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Jonmarker O, Nilsson T, Axelsson R, Ericson LH, Tran TA, Tzortzakakis A, Savitcheva I, Holstensson M. [ 18 F]-PSMA-1007 PET imaging optimization and inter-rater reliability - a comparison of three different reconstructions read by four radiologists. Nucl Med Commun 2024; 45:389-395. [PMID: 38312095 DOI: 10.1097/mnm.0000000000001823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2024]
Abstract
OBJECTIVES To increase understanding of optimal imaging parameters [ 18 F]PSMA-1007 when imaging patients with prostate cancer and to determine interrater agreement using [ 18 F]PSMA-1007. METHODS In this observational study, four independent physicians read reconstruction sets using bedtimes of 1, 2 and 3 minutes of patients undergoing [ 18 F]PSMA-1007. positron emission topography. Clear and equivocal lesions and their locations were recorded. Image noise was rated on a four-point scale. Lesion counts were compared using inter-class correlation whereas noise ratings were compared using generalized estimating equations. Repeated cases were used to assess intra-rater agreement. RESULTS Sixty reconstruction sets of 16 consecutively examined participants were included. Participants had a mean age of 71.5 years, six of them were examined prior to any treatment, three had a history of radiotherapy and seven of prostatectomy. Median Gleason score of primary tumors was 7. Imaging was performed after a mean of 132 min using a mean 3.95 MBq/Kg body weight of [ 18 F] PSMA-1007. Neither the total number of lesions per location nor the proportion of equivocal lesions varied consistently between bedtimes. Inter-rater reliability scores varied depending on location from 0.40 to 1.0 and were similar for all bedtimes. Intra-rater reliability varied between 0.70 and 0.76 for the three different bedtimes. Noise ratings were significantly lower for 1 minute than 3 minutes per bed. CONCLUSION In the setting of [ 18 F]PSMA-1007 PET CT, 1, 2 and 3 minutes per bed produce similar results unlikely to affect clinical interpretation. Image noise ratings favor 2 and 3 minutes per bed.
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Affiliation(s)
- Olof Jonmarker
- Medical Diagnostics Karolinska, Karolinska University Hospital,
- Division of Radiology, Department for Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet,
| | - Ted Nilsson
- Division of Radiology, Department for Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet,
- Medical Radiation Physics and Nuclear Medicine, Functional Unit of Nuclear Medicine, Karolinska University Hospital,
| | - Rimma Axelsson
- Medical Radiation Physics and Nuclear Medicine, Functional Unit of Nuclear Medicine, Karolinska University Hospital,
- Department of Molecular Medicine and Surgery, Karolinska Institutet,
| | | | - Thuy A Tran
- Radiopharmacy, Medical Diagnostics Karolinska, Karolinska University Hospital and
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
| | - Antonios Tzortzakakis
- Division of Radiology, Department for Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet,
- Medical Radiation Physics and Nuclear Medicine, Functional Unit of Nuclear Medicine, Karolinska University Hospital,
| | - Irina Savitcheva
- Medical Radiation Physics and Nuclear Medicine, Functional Unit of Nuclear Medicine, Karolinska University Hospital,
| | - Maria Holstensson
- Division of Radiology, Department for Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet,
- Medical Radiation Physics and Nuclear Medicine, Functional Unit of Nuclear Medicine, Karolinska University Hospital,
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Wang H, Zhu H, Li G, Dai J, Huang H, Jia Q. Effect of 18F-DCFPyL PET on changes in management of patients with prostate cancer: a systematic review and meta-analysis. Front Med (Lausanne) 2024; 11:1355236. [PMID: 38725467 PMCID: PMC11079165 DOI: 10.3389/fmed.2024.1355236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 04/15/2024] [Indexed: 05/12/2024] Open
Abstract
Purpose Prostate-specific membrane antigen (PSMA)-targeted imaging has gained increasing interest in its application in prostate cancer lesion detection. Compared with 68Galium (68Ga), 18Fluoride (18F)-labeled imaging agent has easier syntheses, lower price, and a longer half-time. 2-(3-{1-Carboxy-5-[(6-[18F]fluoro-pyridine-3-carbonyl)-amino]-pentyl}-ureido)-pentanedioic acid positron emission tomography (18F-DCFPyL PET) has been recently approved by the U.S. Food and Drug Administration. Several studies have proven its superiority to conventional imaging techniques in detecting prostate cancer lesions. However, the impact of 18F-DCFPyL PET on the management of patients with prostate cancer is not well established. Thus, we performed a systematic review and meta-analysis of available data to evaluate the impact of 18F-DCFPyL PET on the management of patients with prostate cancer. Methods The PubMed, Embase, Scopus, and Cochrane databases were searched up to April 2024. Studies that reported the proportion of changes in management after 18F-DCFPyL PET was performed in patients with prostate cancer were included. The Grading of Recommendations Assessment, Development, and Evaluation system was used for the quality evaluation of the included studies. The proportion of changes in management was pooled using a random effects model. Meta-regression analyses were performed to assess the potential correlation between the PET positivity and management changes. Results Fourteen studies (3,078 patients with prostate cancer) were included in our review and analysis. The pooled percentage of management changes was 43.5% (95% confidence interval [CI]: 33-54%). In patients with biochemical recurrent and for primary staging, the pooled percentage was 50% (95% CI: 39-60%) and 22% (95% CI: 15-29%), respectively. In the meta-regression analyses, PET positivity was detected as a significant predictor of management change (p = 0.0023). Conclusion 18F-DCFPyL PET significantly affects the management of patients with prostate cancer. Higher PET positivity rate significantly correlated with a higher proportion of management changes in patients with prostate cancer. However, more studies are still needed to confirm the important role of 18F-DCFPyL PET in the management of prostate cancer. Systematic review registration https://www.crd.york.ac.uk/PROSPERO/#myprospero, CRD42022339178.
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Affiliation(s)
- Hui Wang
- Department of Nuclear Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - HongMei Zhu
- Department of Nuclear Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - GuanNan Li
- Department of Nuclear Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - JiaoNa Dai
- Department of Nuclear Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - HeXiao Huang
- Department of Nuclear Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Qiong Jia
- Department of Pediatrics, Peking University Third Hospital, Beijing, China
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Gühne F, Schilder T, Seifert P, Kühnel C, Freesmeyer M. Dependence of Renal Uptake on Kidney Function in [ 68Ga]Ga-PSMA-11 PET/CT Imaging. Diagnostics (Basel) 2024; 14:696. [PMID: 38611608 PMCID: PMC11012145 DOI: 10.3390/diagnostics14070696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 03/21/2024] [Accepted: 03/24/2024] [Indexed: 04/14/2024] Open
Abstract
(1) Background: PSMA ligand PET/CT is increasingly important for diagnostics of prostate cancer and other tumor diseases. In particular, the radiopharmaceutical [68Ga]Ga-PSMA-11 is widely used. Besides its tumor-specific binding, the uptake within the kidneys is dominant and seems to visualize the renal cortex specifically. Kidney diseases may alter the uptake of radiopharmaceuticals. Therefore, the correlation between renal uptake in PET/CT imaging and renal function should be investigated. (2) Methods: A group of 103 male patients were retrospectively evaluated for eGFR according to the CKD-EPI equation, tracer uptake intensity (SUVmax, SUVpeak, SUVmean), the molecular volume of the renal cortex, morphological kidney size, and total renal uptake. Manual and three different computer-assisted contouring methods (thresholds at 50% of SUVmax, 30% of SUVmax, and absolute SUV of 20) were used for measurements. Correlations between parameters were calculated using linear regression models. (3) Results: Renal SUVmax, SUVpeak, and SUVmean do not correlate with eGFR for manual or computer-assisted measurements. In contrast, molecular cortex volume shows a moderate correlation with eGFR (R2 = 0.231, p < 0.001), superior to morphological kidney size. A contouring threshold of 30% of SUVmax outperformed the other settings for renal cortex volume and total renal uptake. (4) Conclusions: Renal uptake of [68Ga]Ga-PSMA-11 cannot predict eGFR, but the functional renal cortex can be quantified by PET/CT imaging.
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Affiliation(s)
| | | | | | | | - Martin Freesmeyer
- Clinic of Nuclear Medicine, Jena University Hospital, Am Klinikum 1, 07747 Jena, Germany
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4
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Lindgren Belal S, Frantz S, Minarik D, Enqvist O, Wikström E, Edenbrandt L, Trägårdh E. Applications of Artificial Intelligence in PSMA PET/CT for Prostate Cancer Imaging. Semin Nucl Med 2024; 54:141-149. [PMID: 37357026 DOI: 10.1053/j.semnuclmed.2023.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 06/12/2023] [Indexed: 06/27/2023]
Abstract
Prostate-specific membrane antigen (PSMA) positron emission tomography/computed tomography (PET/CT) has emerged as an important imaging technique for prostate cancer. The use of PSMA PET/CT is rapidly increasing, while the number of nuclear medicine physicians and radiologists to interpret these scans is limited. Additionally, there is variability in interpretation among readers. Artificial intelligence techniques, including traditional machine learning and deep learning algorithms, are being used to address these challenges and provide additional insights from the images. The aim of this scoping review was to summarize the available research on the development and applications of AI in PSMA PET/CT for prostate cancer imaging. A systematic literature search was performed in PubMed, Embase and Cinahl according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A total of 26 publications were included in the synthesis. The included studies focus on different aspects of artificial intelligence in PSMA PET/CT, including detection of primary tumor, local recurrence and metastatic lesions, lesion classification, tumor quantification and prediction/prognostication. Several studies show similar performances of artificial intelligence algorithms compared to human interpretation. Few artificial intelligence tools are approved for use in clinical practice. Major limitations include the lack of external validation and prospective design. Demonstrating the clinical impact and utility of artificial intelligence tools is crucial for their adoption in healthcare settings. To take the next step towards a clinically valuable artificial intelligence tool that provides quantitative data, independent validation studies are needed across institutions and equipment to ensure robustness.
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Affiliation(s)
- Sarah Lindgren Belal
- Department of Translational Medicine and Wallenberg Centre for Molecular Medicine, Lund University, Malmö, Sweden; Department of Surgery, Skåne University Hospital, Malmö, Sweden
| | - Sophia Frantz
- Department of Translational Medicine and Wallenberg Centre for Molecular Medicine, Lund University, Malmö, Sweden; Department of Health Technology Assessment South, Skåne University Hospital, Lund, Sweden
| | - David Minarik
- Department of Translational Medicine and Wallenberg Centre for Molecular Medicine, Lund University, Malmö, Sweden; Department of Radiation Physics, Skåne University Hospital, Malmö, Sweden
| | - Olof Enqvist
- Department of Electrical Engineering, Chalmers University of Technology, Gothenburg, Sweden; Department of Clinical Physiology and Nuclear Medicine, Malmö Sweden
| | - Erik Wikström
- Department of Health Technology Assessment South, Skåne University Hospital, Lund, Sweden
| | - Lars Edenbrandt
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Sweden
| | - Elin Trägårdh
- Department of Translational Medicine and Wallenberg Centre for Molecular Medicine, Lund University, Malmö, Sweden; Department of Clinical Physiology and Nuclear Medicine, Skåne University Hospital, Malmö, Sweden.
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5
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Han T, Quan Z, Wang M, Meng X, Zhang M, Ye J, Li G, Wang J, Kang F. Head-to-Head Comparison of 68Ga-PSMA-11 with 68Ga-P137 in Patients with Suspected Prostate Cancer. Mol Pharm 2023; 20:5646-5654. [PMID: 37862042 DOI: 10.1021/acs.molpharmaceut.3c00522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Abstract
P137 is a novel oxalyldiaminopropionic acid-urea-based prostate-specific membrane antigen (PSMA) targeting agent. This study compared the uptake patterns of 68Ga-P137 and the FDA-approved PET tracer 68Ga-PSMA-11 for diagnosing prostate cancer (PCa). Sixteen patients suspected of PCa were scanned by 68Ga-PSMA-11 and 68Ga-P137 PET/CT, respectively, followed by prospective analysis. The tumor-to-background ratio was calculated using normal prostate tissue, blood pool, muscle, and urine as backgrounds. Pathology or follow-up results were used to analyze uptake patterns of benign/malignant lesions and various organs. Thirteen patients were diagnosed with PCa and three with benign prostate diseases (BPD). The number and location of primary lesions, lymph node metastasis (LNM) (n = 25), bone metastasis (n = 30), and liver metastasis (n = 3) detected by the two tracers were identical. Maximum standardized uptake value (SUVmax), tumor/normal prostate ratio, as well as semiquantitative miPSMA-ES and PRIMARY diagnostic scores (P all >0.05) showed similar uptake levels of primary lesions between 68Ga-P137 and 68Ga-PSMA-11. Compared to 68Ga-P137, the SUVmax of 68Ga-PSMA-11 was significantly higher for bone metastasis, LNM, and liver metastasis (14.9 ± 7.2 vs 9.1 ± 4.4, 14.4 ± 5.0 vs 7.5 ± 2.4, 13.9 ± 2.0 vs 8.8 ± 2.4, P all <0.05). One-hour postinjection, SUVmax of the duodenum (9.4 ± 2.1 vs 16.2 ± 6.1), kidney (19.4 ± 4.3 vs 45.6 ± 20.9), and urine (14.1 ± 7.1 vs 42.1 ± 25.9) were significantly lower for 68Ga-P137 than for 68Ga-PSMA-11 (P all <0.05), whereas the radioactivity accumulation of blood pool and muscle (3.9 ± 0.5 vs 1.6 ± 0.4, 1.0 ± 0.1 vs 0.6 ± 0.1, P all <0.05) of 68Ga-P137 was significantly higher than 68Ga-PSMA-11. The uptake level of 68Ga-P137 has no significant difference from that of 68Ga-PSMA-11 in prostate primary lesions, and their imaging performances are visually equivalent for both primary and metastatic lesions, despite a higher blood pool and muscle background and a lower uptake in metastatic lesions. Due to the lower urine excretion of 68Ga-P137, primary prostate lesions near the urine can potentially be displayed clearer than 68Ga-PSMA-11.
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Affiliation(s)
- Tingting Han
- Department of Nuclear Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Zhiyong Quan
- Department of Nuclear Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Min Wang
- Department of Nuclear Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Xiaoli Meng
- Department of Nuclear Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Mingru Zhang
- Department of Nuclear Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Jiajun Ye
- Department of Nuclear Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Guiyu Li
- Department of Nuclear Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Jing Wang
- Department of Nuclear Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Fei Kang
- Department of Nuclear Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
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6
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Lin BH, Chen SH, Chen SM, Qiu QRS, Gao RC, Wei Y, Zheng QS, Miao WB, Xu N. Head-to-head comparisons of 68Ga-PSMA-11 and 18F-FDG PET/CT in evaluating patients with upper tract urothelial carcinoma: a prospective pilot study. Int Urol Nephrol 2023; 55:2753-2764. [PMID: 37477778 DOI: 10.1007/s11255-023-03710-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 07/10/2023] [Indexed: 07/22/2023]
Abstract
PURPOSE To prospectively compare the uptake of 68Ga-prostate specific membrane antigen (68Ga-PSMA)-11 and 18F-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) in upper tract urothelial carcinoma (UTUC) and investigate the correlation between radiological parameters and pathological features of UTUC. METHODS Clinicopathologic and imaging data were collected from 10 UTUC patients who underwent preoperative 68Ga-PSMA-11 and 18F-FDG PET/CT scans. The diagnostic capabilities of both imaging techniques were analyzed and compared in UTUC. Angiogenesis in the malignancies was assessed using Chalkley counting and the expression of folate hydrolase 1 (FOLH1) and glucose transporter 1 (GLUT1) in UTUC were evaluated in the surgical specimens. Double immunofluorescence staining of PSMA and CD34 was used to examine tumor neovascularization. Tracer uptake and expression were compared and explored. Additionally, 10 patients with clear cell renal cell carcinoma (ccRCC) were included for prospective, comparative research. RESULTS Ten UTUC patients with 12 malignant lesions and another 10 ccRCC patients were included. 18F-FDG PET/CT demonstrated a more effective detection of UTUC foci compared to 68Ga-PSMA-11 PET/CT (the SUVmax of 18.48 ± 6.73 vs. 4.38 ± 1.45, P < 0.01). Immunohistochemical analysis revealed a statistically significant difference in the expression of PSMA and GLUT1 in UTUC (P = 0.048), with higher pathological grades showing more intense GLUT1 staining than PSMA (75% vs. 12.5%). The Chalkley counting of angiogenesis in ccRCC was significantly higher than that in UTUC (229.34 vs. 71.67), which was proportional to 68Ga-PSMA-11 PET/CT SUVmax (both P < 0.05). CONCLUSION 18F-FDG PET/CT holds better clinical potential for evaluating UTUC and detecting lymph node metastasis compared to 68Ga-PSMA-11 PET/CT, likely due to the relatively scant expression of FOLH1 in tumor neovascular endothelium while the abundant expression of GLUT1 in malignancy. Furthermore, the lower neovascular density in UTUC should not be overlooked.
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Affiliation(s)
- Bo-Han Lin
- Department of Urology, Urology Research Institute, The First Affiliated Hospital of Fujian Medical University, Fuzhou, 350005, China
- Department of Urology, National Region Medical Centre, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, 350212, China
| | - Shao-Hao Chen
- Department of Urology, Urology Research Institute, The First Affiliated Hospital of Fujian Medical University, Fuzhou, 350005, China
- Department of Urology, National Region Medical Centre, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, 350212, China
| | - Shao-Ming Chen
- Department of Nuclear Medicine, The First Affiliated Hospital of Fujian Medical University, Fuzhou, 350005, China
| | - Qian-Ren-Shun Qiu
- Department of Urology, Urology Research Institute, The First Affiliated Hospital of Fujian Medical University, Fuzhou, 350005, China
- Department of Urology, National Region Medical Centre, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, 350212, China
| | - Rui-Cheng Gao
- Department of Urology, Urology Research Institute, The First Affiliated Hospital of Fujian Medical University, Fuzhou, 350005, China
- Department of Urology, National Region Medical Centre, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, 350212, China
| | - Yong Wei
- Department of Urology, Urology Research Institute, The First Affiliated Hospital of Fujian Medical University, Fuzhou, 350005, China
- Department of Urology, National Region Medical Centre, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, 350212, China
| | - Qing-Shui Zheng
- Department of Urology, Urology Research Institute, The First Affiliated Hospital of Fujian Medical University, Fuzhou, 350005, China
- Department of Urology, National Region Medical Centre, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, 350212, China
| | - Wei-Bing Miao
- Department of Nuclear Medicine, The First Affiliated Hospital of Fujian Medical University, Fuzhou, 350005, China.
- Fujian Key Laboratory of Precision Medicine for Cancer, The First Affiliated Hospital of Fujian Medical University, Fuzhou, 350005, China.
| | - Ning Xu
- Department of Urology, Urology Research Institute, The First Affiliated Hospital of Fujian Medical University, Fuzhou, 350005, China.
- Fujian Key Laboratory of Precision Medicine for Cancer, The First Affiliated Hospital of Fujian Medical University, Fuzhou, 350005, China.
- Department of Urology, National Region Medical Centre, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, 350212, China.
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Mojsak M, Szumowski P, Amelian A, Hladunski M, Kubas B, Myśliwiec J, Kochanowicz J, Moniuszko M. Application of 18F-PSMA-1007 PET/MR Imaging in Early Biochemical Recurrence of Prostate Cancer: Results of a Prospective Study of 60 Patients with Very Low PSA Levels ≤ 0.5 ng/mL. Cancers (Basel) 2023; 15:4185. [PMID: 37627213 PMCID: PMC10453039 DOI: 10.3390/cancers15164185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 08/12/2023] [Accepted: 08/17/2023] [Indexed: 08/27/2023] Open
Abstract
The use of 18F-PSMA-1007 and the role of PET/MR in the diagnosis of prostate cancer are not conclusively confirmed. There are reports indicating the potential pros and cons of using 18F-PSMA-1007 as well as the PET/MR technique in prostate cancer recurrence, but they are not yet included in the EAU guidelines. The aim of the study was to assess the effectiveness of 18F-PSMA-1007 PET/MR in detecting BCR lesions at very low PSA levels <0.5 ng/mL. METHODS Sixty patients with BCR after radical prostatectomy (RP) with PSA ranged 0.1-0.5 ng/mL were enrolled in a prospective study. All patients underwent simultaneous whole-body and pelvic 18F-PSMA-1007 PET/MR. The obtained results were verified by 12-month follow-up. RESULTS Fifty-three lesions were detected in 45 patients with 75% detection rate. The mean PSA value was 0.31 ng/mL. Of all PSMA-positive foci, 91% were localized in the pelvis, and only 9% of lesions were located in the extrapelvic region. Local recurrences were detected in 29%, PSMA-positive lymph nodes were detected in 64% of patients and bone metastases lesions were detected in 7% of patients. CONCLUSIONS 18F-PSMA-1007 PET/MR seems to be an excellent diagnostic tool in patients with early BCR with very low PSA levels, especially with dt PSA < 6 months. The synergistic effect of combining 18F-PSMA-1007 and whole-body PET/MR with precise multiparametric assessment of pelvic lesions is of particular benefit in early BCR.
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Affiliation(s)
- Małgorzata Mojsak
- Independent Laboratory of Molecular Imaging, Medical University of Bialystok, 15-276 Bialystok, Poland; (A.A.)
| | - Piotr Szumowski
- Department of Nuclear Medicine, Medical University of Bialystok, 15-276 Bialystok, Poland; (P.S.)
| | - Anna Amelian
- Independent Laboratory of Molecular Imaging, Medical University of Bialystok, 15-276 Bialystok, Poland; (A.A.)
| | - Marcin Hladunski
- Independent Laboratory of Molecular Imaging, Medical University of Bialystok, 15-276 Bialystok, Poland; (A.A.)
| | - Bożena Kubas
- Department of Radiology, Medical University of Bialystok, 15-276 Bialystok, Poland
| | - Janusz Myśliwiec
- Department of Nuclear Medicine, Medical University of Bialystok, 15-276 Bialystok, Poland; (P.S.)
| | - Jan Kochanowicz
- Department of Neurology, Medical University of Bialystok, 15-276 Bialystok, Poland
| | - Marcin Moniuszko
- Department of Regenerative Medicine and Immune Regulation, Medical University of Bialystok, 15-276 Bialystok, Poland;
- Clinical Department of Allergic and Internal Diseases, Medical University of Bialystok, 15-276 Bialystok, Poland
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Berliner C, Steinhelfer L, Chantadisai M, Kroenke M, Koehler D, Pose R, Bannas P, Knipper S, Eiber M, Maurer T. Delayed Imaging Improves Lesion Detectability in [ 99mTc]Tc-PSMA-I&S SPECT/CT in Recurrent Prostate Cancer. J Nucl Med 2023:jnumed.122.265252. [PMID: 37230531 DOI: 10.2967/jnumed.122.265252] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 03/07/2023] [Indexed: 05/27/2023] Open
Abstract
Our objective was to compare the ability to detect histopathologically confirmed lymph node metastases by early and delayed [99mTc]Tc-PSMA-I&S SPECT/CT in early biochemically recurrent prostate cancer. Methods: We retrospectively analyzed 222 patients selected for radioguided surgery using [99mTc]Tc-PSMA-I&S SPECT/CT at different time points after injection (≤4 h and >15 h). In total, 386 prostate-specific membrane antigen (PSMA) PET predetermined lesions were analyzed on SPECT/CT using a 4-point scale, and the results were compared between early and late imaging groups, with uni- and multivariate analyses performed including prostate-specific antigen, injected [99mTc]Tc-PSMA-I&S activity, Gleason grade group, initial TNM stage, and, stratified by size, PSMA PET/CT-positive lymph nodes. PSMA PET/CT findings served as the standard of reference. Results: [99mTc]Tc-PSMA-I&S SPECT/CT had a significantly higher positivity rate for detecting lesions in the late than the early imaging group (79%, n = 140/178, vs. 27%, n = 12/44 [P < 0.05] on a patient basis; 60%, n = 195/324, vs. 21%, n = 13/62 [P < 0.05] on a lesion basis). Similar positivity rates were found when lesions were stratified by size. Multivariate analysis found that SUVmax on PSMA PET/CT and the uptake time of [99mTc]Tc-PSMA-I&S were independent predictors for lesion detectability on SPECT/CT. Conclusion: Late imaging (>15 h after injection) should be preferred when [99mTc]Tc-PSMA-I&S SPECT/CT is used for lesion detection in early biochemical recurrence of prostate cancer. However, the performance of PSMA SPECT/CT is clearly inferior to that of PSMA PET/CT.
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Affiliation(s)
- Christoph Berliner
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, Universitätsklinikum Hamburg-Eppendorf, Hamburg, Germany;
- Department of Nuclear Medicine, Universitätsklinikum Essen, Essen, Germany
| | - Lisa Steinhelfer
- Department of Nuclear Medicine, Klinikum Rechts der Isar, Technische Universität München, München, Germany
| | - Maythinee Chantadisai
- Department of Nuclear Medicine, Klinikum Rechts der Isar, Technische Universität München, München, Germany
| | - Markus Kroenke
- Department of Nuclear Medicine, Klinikum Rechts der Isar, Technische Universität München, München, Germany
| | - Daniel Koehler
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, Universitätsklinikum Hamburg-Eppendorf, Hamburg, Germany
| | - Randi Pose
- Martini-Klinik Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany; and
| | - Peter Bannas
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, Universitätsklinikum Hamburg-Eppendorf, Hamburg, Germany
| | - Sophie Knipper
- Martini-Klinik Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany; and
| | - Matthias Eiber
- Martini-Klinik Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany; and
| | - Tobias Maurer
- Martini-Klinik Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany; and
- Department of Urology, University Hospital Hamburg-Eppendorf, Hamburg, Germany
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Hvittfeldt E, Bitzén U, Minarik D, Oddstig J, Olsson B, Trägårdh E. PET/CT imaging 2 h after injection of [ 18F]PSMA-1007 can lead to higher staging of prostate cancer than imaging after 1 h. Eur J Hybrid Imaging 2023; 7:9. [PMID: 37121920 PMCID: PMC10149540 DOI: 10.1186/s41824-023-00167-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 03/15/2023] [Indexed: 05/02/2023] Open
Abstract
BACKGROUND [18F]PSMA-1007 is a prostate specific membrane antigen (PSMA) ligand for positron emission tomography (PET) imaging of prostate cancer. Current guidelines recommend imaging 90-120 min after injection but strong data about optimal timing is lacking. Our aim was to study whether imaging after 1 h and 2 h leads to a different number of detected lesions, with a specific focus on lesions that might lead to a change in treatment. METHODS 195 patients underwent PET with computed tomography imaging 1 and 2 h after injection of [18F]PSMA-1007. Three readers assessed the status of the prostate or prostate bed and suspected metastases. We analyzed the location and number of found metastases to determine N- and M-stage of patients. We also analyzed standardized uptake values (SUV) in lesions and in normal tissue. RESULTS Significantly more pelvic lymph nodes and bone metastases were found and higher N- and M-stages were seen after 2 h. In twelve patients (6.1%) two or three readers agreed on a higher N- or M-stage after 2 h. Conversely, in two patients (1.0%), two readers agreed on a higher stage at 1 h. SUVs in suspected malignant lesions and in normal tissues were higher at 2 h, but lower in the blood pool and urinary bladder. CONCLUSIONS Imaging at 2 h after injection of [18F]PSMA-1007 leads to more suspected metastases found than after 1 h, with higher staging in some patients and possible effect on patient treatment.
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Affiliation(s)
- Erland Hvittfeldt
- Department of Translational Medicine, Wallenberg Centre for Molecular Medicine, Lund University, Carl Bertil Laurells gata 9, 205 02, Malmö, Sweden.
- Department of Clinical Physiology and Nuclear Medicine, Skåne University Hospital, Malmö, Sweden.
| | - Ulrika Bitzén
- Department of Clinical Physiology and Nuclear Medicine, Skåne University Hospital, Lund, Sweden
| | - David Minarik
- Department of Translational Medicine, Wallenberg Centre for Molecular Medicine, Lund University, Carl Bertil Laurells gata 9, 205 02, Malmö, Sweden
- Department of Medical Physics, Skåne University Hospital, Malmö, Sweden
| | - Jenny Oddstig
- Department of Translational Medicine, Wallenberg Centre for Molecular Medicine, Lund University, Carl Bertil Laurells gata 9, 205 02, Malmö, Sweden
- Department of Medical Physics, Skåne University Hospital, Lund, Sweden
| | - Berit Olsson
- Department of Translational Medicine, Wallenberg Centre for Molecular Medicine, Lund University, Carl Bertil Laurells gata 9, 205 02, Malmö, Sweden
- Department of Clinical Physiology and Nuclear Medicine, Skåne University Hospital, Malmö, Sweden
| | - Elin Trägårdh
- Department of Translational Medicine, Wallenberg Centre for Molecular Medicine, Lund University, Carl Bertil Laurells gata 9, 205 02, Malmö, Sweden
- Department of Clinical Physiology and Nuclear Medicine, Skåne University Hospital, Malmö, Sweden
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10
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Afshar-Oromieh A, Eiber M, Fendler W, Schmidt M, Rahbar K, Ahmadzadehfar H, Umutlu L, Hadaschik B, Hakenberg OW, Fornara P, Kurth J, Neels O, Wester HJ, Schwaiger M, Kopka K, Haberkorn U, Herrmann K, Krause BJ. [Procedure Guideline for Prostate Cancer Imaging with PSMA-ligand PET/CT]. Nuklearmedizin 2023; 62:5-19. [PMID: 36746147 DOI: 10.1055/a-1984-8167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
PSMA-PET/CT for imaging prostate cancer (PC) has spread worldwide since its clinical introduction in 2011. The majority of experiences have been collected for PSMA-PET-imaging of recurrent PC. Data for primary staging of high-risk PC are highly promising. Meanwhile, a plethora of PSMA-ligands are available for clinical use (e. g. 68Ga-PSMA-11, 68Ga-PSMA-I&T, 68Ga-PSMA-617, 18F-DCFBC, 18F-DCFPyL, 18F-PSMA-1007, 18F-rhPSMA-7 and 18F-JK-PSMA-7). However, an official approval is available only for 68Ga-PSMA-11 (approved by the US FDA in 2020) and 18F-DCFPyL (approved by the US FDA in 2021).Recommendations for acquisition times vary from 1-2 h p. i. It has been shown that for the majority of tumour lesions, the contrast in PSMA-PET/CT increases with time. Therefore, additional late imaging can help to clarify unclear findings. PSMA-PET/CT should be performed prior to commencing an androgen deprivation therapy (ADT) since (long term) ADT reduces the visibility of PC lesions. Following injection of PSMA-ligands, hydration and forced diuresis are recommended for PSMA-ligands with primarily excretion via the kidneys in order to increase the visibility of tumour lesions adjacent to the urinary bladder.PSMA-ligands are physiologically taken up in multiple normal organs. For some 18F-labelled PSMA-ligands, presence of unspecific focal bone uptake has been reported. When using these tracers, focal bone uptake without CT-correlate should be interpreted with great caution. Besides prostate cancer, practically all solid tumors express PSMA in their neovasculature thereby taking up PSMA-ligands, although usually at a lower extent compared to PC. Also multiple benign lesions and inflammatory processes (e. g. lymph nodes) take up PSMA-ligands, also usually at lower extent compared to PC.
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Affiliation(s)
- Ali Afshar-Oromieh
- Universitätsklinikum Bern, Inselspital, Klinik für Nuklearmedizin, Universität Bern, Schweiz
| | - Matthias Eiber
- Technische Universität München, Klinik für Nuklearmedizin
| | | | - Matthias Schmidt
- Universitätsklinikum Köln, Klinik und Poliklinik für Nuklearmedizin
| | - Kambiz Rahbar
- Universitätsklinikum Münster, Klinik für Nuklearmedizin
| | | | - Lale Umutlu
- Universitätsklinikum Essen, Klinik für Radiologie
| | - Boris Hadaschik
- Universitätsklinikum Essen, Klinik und Poliklinik für Urologie, Kinderurologie und Uroonkologie
| | | | - Paolo Fornara
- Universitätsklinikum Halle, Universitätsklinik und Poliklinik für Urologie
| | - Jens Kurth
- Universitätsmedizin Rostock, Klinik und Poliklinik für Nuklearmedizin
| | - O Neels
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institut für Radiopharmazeutische Krebsforschung.,Deutsches Konsortium für Translationale Krebsforschung (DKTK), Partnerstandort Dresden
| | | | | | - Klaus Kopka
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institut für Radiopharmazeutische Krebsforschung.,Deutsches Konsortium für Translationale Krebsforschung (DKTK), Partnerstandort Dresden
| | - Uwe Haberkorn
- Universitätsklinikum Heidelberg, Abteilung Nuklearmedizin der Radiologischen Klinik
| | - Ken Herrmann
- Universitätsklinikum Essen, Klinik für Nuklearmedizin
| | - Bernd J Krause
- Universitätsmedizin Rostock, Klinik und Poliklinik für Nuklearmedizin
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11
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Kim SB, Song IH, Kim SY, Ko HY, Kil HS, Chi DY, Giesel FL, Kopka K, Hoepping A, Chun JH, Park HS, Yun M, Kim SE. Preclinical Evaluation of a Companion Diagnostic Radiopharmaceutical, [ 18F]PSMA-1007, in a Subcutaneous Prostate Cancer Xenograft Mouse Model. Mol Pharm 2022; 20:1050-1060. [PMID: 36583623 PMCID: PMC9906735 DOI: 10.1021/acs.molpharmaceut.2c00788] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Several radiolabeled prostate-specific membrane antigen (PSMA)-targeted agents have been developed for detecting prostate cancer, using positron emission tomography imaging and targeted radionuclide therapy. Among them, [18F]PSMA-1007 has several advantages, including a comparatively long half-life, delayed renal excretion, and compatible structure with α-/β-particle emitter-labeled therapeutics. This study aimed to characterize the preclinical pharmacokinetics and internal radiation dosimetry of [18F]PSMA-1007, as well as its repeatability and specificity for target binding using prostate tumor-bearing mice. In PSMA-positive tumor-bearing mice, the kidney showed the greatest accumulation of [18F]PSMA-1007. The distribution in the tumor attained its peak concentration of 2.8%ID/g at 112 min after intravenous injection. The absorbed doses in the tumor and salivary glands were 0.079 ± 0.010 Gy/MBq and 0.036 ± 0.006 Gy/MBq, respectively. The variance of the net influx (Ki) of [18F]PSMA-1007 to the tumor was minimal between scans performed in the same animals (within-subject coefficient of variation = 7.57%). [18F]PSMA-1007 uptake in the tumor was specifically decreased by 32% in Ki after treatment with a PSMA inhibitor 2-(phosphonomethyl)-pentanedioic acid (2-PMPA). In the present study, we investigated the in vivo preclinical characteristics of [18F]PSMA-1007. Our data from [18F]PSMA-1007 PET/computed tomography (CT) studies in a subcutaneous prostate cancer xenograft mouse model supports clinical therapeutic strategies that use paired therapeutic radiopharmaceuticals (such as [177Lu]Lu-PSMA-617), especially strategies with a quantitative radiation dose estimate for target lesions while minimizing radiation-induced toxicity to off-target tissues.
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Affiliation(s)
- Su Bin Kim
- Department
of Applied Bioengineering, Graduate School of Convergence Science
and Technology, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul08826, Korea,Department
of Nuclear Medicine, Seoul National University
College of Medicine, Seoul National University Bundang Hospital, 82 Gumi-ro, 173
Beon-gil, Bundang-gu, Seongnam13620, Korea
| | - In Ho Song
- Department
of Nuclear Medicine, Seoul National University
College of Medicine, Seoul National University Bundang Hospital, 82 Gumi-ro, 173
Beon-gil, Bundang-gu, Seongnam13620, Korea
| | - Seon Yoo Kim
- Department
of Nuclear Medicine, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul03722, Korea
| | - Hae Young Ko
- Department
of Nuclear Medicine, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul03722, Korea
| | - Hee Seup Kil
- Research
Institute of Radiopharmaceuticals, FutureChem
Co. Ltd, Seoul04793, Korea
| | - Dae Yoon Chi
- Research
Institute of Radiopharmaceuticals, FutureChem
Co. Ltd, Seoul04793, Korea
| | - Frederik L. Giesel
- Department
of Nuclear Medicine, Heinreich-Heine-University,
University Hospital Duesseldorf, Duesseldorf40225, Germany
| | - Klaus Kopka
- Institute
of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf (HZDR) e.v., Bautzner Landstrasse 400, Dresden01328, Germany,Technische
Universität Dresden, Faculty of Chemistry and Food Chemistry,
School of Science, Dresden01069, Germany,National
Center for Tumor Diseases (NCT) Dresden, University Hospital Carl Gustav Carus, Fetscherstraße 74, Dresden01307, Germany,German
Cancer Consortium (DKTK), Partner Site Dresden, Dresden01307, Germany
| | - Alexander Hoepping
- Department
of Medicinal Chemistry, ABX Advanced Biochemical
Compounds GmbH, Radeberg1454, Germany
| | - Joong-Hyun Chun
- Department
of Nuclear Medicine, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul03722, Korea
| | - Hyun Soo Park
- Department
of Nuclear Medicine, Seoul National University
College of Medicine, Seoul National University Bundang Hospital, 82 Gumi-ro, 173
Beon-gil, Bundang-gu, Seongnam13620, Korea,Department
of Molecular Medicine and Biopharmaceutical Sciences, Graduate School
of Convergence Science and Technology, Seoul
National University, 1 Gwanak-ro, Gwanak-gu, Seoul08826, Korea,. Tel: +82-31-787-2936. Fax: +82-31-787-4018
| | - Mijin Yun
- Department
of Nuclear Medicine, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul03722, Korea,. Tel: +82-2-2228-6068. Fax: +82-2-2227-8354
| | - Sang Eun Kim
- Department
of Nuclear Medicine, Seoul National University
College of Medicine, Seoul National University Bundang Hospital, 82 Gumi-ro, 173
Beon-gil, Bundang-gu, Seongnam13620, Korea,Department
of Molecular Medicine and Biopharmaceutical Sciences, Graduate School
of Convergence Science and Technology, Seoul
National University, 1 Gwanak-ro, Gwanak-gu, Seoul08826, Korea,Advanced
Institutes of Convergence Technology, 145 Gwanggyo-ro, Yeongtong-gu, Suwon16229, Korea,BIK Therapeutics Inc., 172 Dolma-ro, Bundang-gu, Seongnam13605, Korea,. Tel: +82-31-787-7671. Fax: +82-31-787-4018
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12
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Combes AD, Palma CA, Calopedos R, Wen L, Woo H, Fulham M, Leslie S. PSMA PET-CT in the Diagnosis and Staging of Prostate Cancer. Diagnostics (Basel) 2022; 12:2594. [PMID: 36359439 PMCID: PMC9689635 DOI: 10.3390/diagnostics12112594] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 10/13/2022] [Accepted: 10/24/2022] [Indexed: 08/07/2023] Open
Abstract
Prostate cancer is the most common cancer and the second leading cause of cancer death in men. The imaging assessment and treatment of prostate cancer has vastly improved over the past decade. The introduction of PSMA PET-CT has improved the detection of loco-regional and metastatic disease. PSMA PET-CT also has a role in the primary diagnosis and staging, in detecting biochemical recurrence after curative treatment and in metastasis-directed therapy. In this paper we review the role of PSMA PET-CT in prostate cancer.
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Affiliation(s)
- Alexander D. Combes
- Department of Urology, Royal Prince Alfred Hospital, Sydney, NSW 2050, Australia
| | - Catalina A. Palma
- Department of Urology, Royal Prince Alfred Hospital, Sydney, NSW 2050, Australia
| | - Ross Calopedos
- Department of Urology, Royal Prince Alfred Hospital, Sydney, NSW 2050, Australia
| | - Lingfeng Wen
- Department of Molecular Imaging, Royal Prince Alfred Hospital, Sydney, NSW 2050, Australia
- Faculty of Engineering and Computer Science, University of Sydney, Sydney, NSW 2006, Australia
| | - Henry Woo
- Faculty of Medicine, University of Sydney, Sydney, NSW 2006, Australia
- Department of Urology, Chris O’Brien Lifehouse, Sydney, NSW 2050, Australia
| | - Michael Fulham
- Department of Molecular Imaging, Royal Prince Alfred Hospital, Sydney, NSW 2050, Australia
- Faculty of Medicine, University of Sydney, Sydney, NSW 2006, Australia
| | - Scott Leslie
- Department of Urology, Royal Prince Alfred Hospital, Sydney, NSW 2050, Australia
- Faculty of Medicine, University of Sydney, Sydney, NSW 2006, Australia
- Department of Urology, Chris O’Brien Lifehouse, Sydney, NSW 2050, Australia
- RPA Institute of Academic Surgery, Sydney, NSW 2050, Australia
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13
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Glemser PA, Rotkopf LT, Ziener CH, Beuthien-Baumann B, Weru V, Kopp-Schneider A, Schlemmer HP, Dimitrakopoulou-Strauss A, Sachpekidis C. Hybrid imaging with [ 68Ga]PSMA-11 PET-CT and PET-MRI in biochemically recurrent prostate cancer. Cancer Imaging 2022; 22:53. [PMID: 36138437 PMCID: PMC9502876 DOI: 10.1186/s40644-022-00489-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 09/06/2022] [Indexed: 11/10/2022] Open
Abstract
AIM To compare [68Ga]PSMA-11 PET-CT, [68Ga]PSMA-11 PET-MRI and MRI in a cohort of prostate cancer (PCa) patients in biochemical recurrence after initial curative therapy. MATERIALS AND METHODS Fifty-three patients with biochemically recurrent PCa underwent whole-body [68Ga]PSMA-11 PET-CT 1 hour post-injection (p.i.) followed by [68Ga]PSMA-11 PET-MRI 2.5 hours p.i., including a multiparametric MRI pelvic protocol examination. Imaging data analysis consisted of visual (qualitative) evaluation of the PET-CT, PET-MRI and MRI scans, as well as semi-quantitative and quantitative analyses of the PET and MRI data, including calculation of the parameters standardized uptake value (SUV) and apparent diffusion coefficient (ADC) derived from the PCa lesions. Association analysis was performed between imaging and clinical data, including PSA level and Gleason score. The results were considered significant for p-values less than 0.05 (p < 0.05). RESULTS The hybrid imaging modalities [68Ga]PSMA-11 PET-CT and PET-MRI were positive in more patients than MRI alone. In particular, PET-CT detected lesions suggestive of PCa relapse in 34/53 (64.2%), PET-MRI in 36/53 (67.9%) and MRI in 23/53 patients (43.4%). While no significant differences in lesion detection rate were observed between PET-CT and PET-MRI, the latter was particularly efficient in detection of local recurrences in the prostate bed mainly due to the contribution of the MRI part of the modality. Association analysis revealed a statistically significant increase in the probability of a positive scan with increasing PSA levels for all imaging modalities. Accordingly, there was no significant association between scan positivity rate and Gleason score for any imaging modality. No significant correlation was observed between SUV and ADC values in lymph node metastases. CONCLUSION [68Ga]PSMA-11 PET-CT and PET-MRI provide equally good detection rates for PCa recurrence, both outperforming stand-alone MRI.
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Affiliation(s)
- P A Glemser
- Department of Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - L T Rotkopf
- Department of Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Medical Faculty, Ruprecht-Karls-University Heidelberg, 69120, Heidelberg, Germany
| | - C H Ziener
- Department of Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - B Beuthien-Baumann
- Department of Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - V Weru
- Department of Biostatistics, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - A Kopp-Schneider
- Department of Biostatistics, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - H P Schlemmer
- Department of Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - A Dimitrakopoulou-Strauss
- Clinical Cooperation Unit Nuclear Medicine, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69210, Heidelberg, Germany
| | - C Sachpekidis
- Clinical Cooperation Unit Nuclear Medicine, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69210, Heidelberg, Germany.
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14
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Huang YT, Tseng NC, Chen YK, Huang KH, Lin HY, Huang YY, Hwang TIS, Ou YC. The Detection Performance of 18 F-Prostate-Specific Membrane Antigen-1007 PET/CT in Primary Prostate Cancer : A Systemic Review and Meta-analysis. Clin Nucl Med 2022; 47:755-762. [PMID: 35452013 DOI: 10.1097/rlu.0000000000004228] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Multiple tools are now available to determine the requirement for a biopsy to diagnose prostate cancer, and PET/CT with radiolabeled prostate-specific membrane antigen (PSMA)-targeting radiotracers has been recommended for detecting primary prostate cancer. Particularly, the radiotracer 18 F-PSMA-1007 was found to be more favorable for primary tumors compared with other PSMA-targeting radiotracers because of its low clearance via the urinary tract and better image resolution. Thus, we performed a systematic review and meta-analysis to more accurately evaluate the detection performance of 18 F-PSMA-1007 PET/CT in primary prostate cancer patients. METHODS An update on the databases of PubMed/MEDLINE, EMBASE, and Cochrane Library for comprehensive literature search was performed on September 30, 2021. The pooling detection rate was calculated on a per-patient basis. The pooling median of the SUV max was analyzed from the included studies. Furthermore, the positive predictive value of 18 F-PSMA-1007 PET/CT with pathologic lesions was analyzed using the criterion standard. RESULTS Twelve studies (540 patients total) were included in the meta-analysis. The overall pooling detection rate of 18 F-PSMA-1007 per patient was 94%, and the pooling median of SUV max located at the intraprostate tumor was 16 (range, 3.7-77.7). The positive predictive value of 18 F-PSMA-1007 per lesion with histopathological validation was 0.90, detecting regional lymph node metastasis was 0.94, and detecting localized prostatic tumors was 0.84. CONCLUSIONS In the current meta-analysis, we revealed the excellent performance of 18 F-PSMA-1007 to detect localized prostatic tumor lesions and regional lymph node metastasis. Moreover, the uptake of localized tumors in primary prostate cancer was nearly liver uptake and may be considered a suspicious malignancy if it was equal to or greater than the liver uptake.
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15
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Ingvar J, Hvittfeldt E, Trägårdh E, Simoulis A, Bjartell A. Assessing the accuracy of [ 18F]PSMA-1007 PET/CT for primary staging of lymph node metastases in intermediate- and high-risk prostate cancer patients. EJNMMI Res 2022; 12:48. [PMID: 35943665 PMCID: PMC9363552 DOI: 10.1186/s13550-022-00918-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 07/27/2022] [Indexed: 11/29/2022] Open
Abstract
Background [18F]PSMA-1007 is a promising tracer for integrated positron emission tomography and computed tomography (PET/CT).
Objective Our aim was to assess the diagnostic accuracy of [18F]PSMA-1007 PET/CT for primary staging of lymph node metastasis before robotic-assisted laparoscopy (RALP) with extended lymph node dissection (ePLND). Design, Setting and Participants The study was a retrospective cohort in a tertiary referral center. Men with prostate cancer that underwent surgical treatment for intermediate- or high-risk prostate cancer between May 2019 and August 2021 were included. Interventions [18F]PSMA-1007 PET/CT for initial staging followed by RALP and ePLND. Outcome measurements and statistical analyses Sensitivity and specificity were calculated both for the entire cohort and for patients with lymph node metastasis ≥ 3 mm. Positive (PPV) and negative (NPV) predictive values were calculated. Results and limitations Among 104 patients included in the analyses, 26 patients had lymph node metastasis based on pathology reporting and metastases were ≥ 3 mm in size in 13 of the cases (50%). In the entire cohort, the sensitivity and specificity of [18F]PSMA-1007 were 26.9% (95% confidence interval (CI); 11.6–47.8) and 96.2% (95% CI; 89.2–99.2), respectively. The sensitivity and specificity of [18F]PSMA-1007 to detect a lymph node metastasis ≥ 3 mm on PET/CT were 53.8% (95% CI; 25.1–80.8) and 96.7% (95% CI; 90.7–99.3), respectively. PPV was 70% and NPV 93.6%. Conclusions In primary staging of intermediate- and high-risk prostate cancer, [18F]PSMA-1007 PET/CT is highly specific for prediction of lymph node metastases, but the sensitivity for detection of metastases smaller than 3 mm is limited. Based on our results, [18F]PSMA-1007 PET/CT cannot completely replace ePLND. Patient summary This study investigated the use of an imaging method based on a prostate antigen-specific radiopharmaceutical tracer to detect lymph node prostate cancer metastasis. We found that it is unreliable to discover small metastasis.
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Affiliation(s)
- Jacob Ingvar
- Department of Urology, Skåne University Hospital, Malmö, Sweden. .,Department of Translational Medicine, Faculty of Medicine, Lund University, Jan Waldenströmsgata 5, 205 02, Malmö, Sweden.
| | - Erland Hvittfeldt
- Department of Translational Medicine, Faculty of Medicine, Lund University, Jan Waldenströmsgata 5, 205 02, Malmö, Sweden.,Clinical Physiology and Nuclear Medicine, Skåne University Hospital, Malmö, Sweden.,Wallenberg Centre for Molecular Medicine, Lund University, Lund, Sweden
| | - Elin Trägårdh
- Department of Translational Medicine, Faculty of Medicine, Lund University, Jan Waldenströmsgata 5, 205 02, Malmö, Sweden.,Clinical Physiology and Nuclear Medicine, Skåne University Hospital, Malmö, Sweden.,Wallenberg Centre for Molecular Medicine, Lund University, Lund, Sweden
| | - Athanasios Simoulis
- Department of Translational Medicine, Faculty of Medicine, Lund University, Jan Waldenströmsgata 5, 205 02, Malmö, Sweden.,Department of Pathology, Skåne University Hospital and Lund University, Malmö, Sweden
| | - Anders Bjartell
- Department of Urology, Skåne University Hospital, Malmö, Sweden.,Department of Translational Medicine, Faculty of Medicine, Lund University, Jan Waldenströmsgata 5, 205 02, Malmö, Sweden
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16
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The Role of PSMA PET/CT in the Primary Diagnosis and Follow-Up of Prostate Cancer-A Practical Clinical Review. Cancers (Basel) 2022; 14:cancers14153638. [PMID: 35892897 PMCID: PMC9367536 DOI: 10.3390/cancers14153638] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 07/21/2022] [Accepted: 07/22/2022] [Indexed: 02/04/2023] Open
Abstract
Simple Summary The combination of positron emission tomography (PET)-diagnostics with ligands binding to the prostate-specific membrane antigen (PSMA) has been a diagnostic milestone in the situation of biochemical recurrence of prostate cancer and is gaining importance in primary diagnostics, providing a highly specific and sensitive diagnostic method in various clinical situations. However, the clinical application of this method requires a comprehensive knowledge of its advantages and disadvantages, potential pitfalls and influencing factors. This review aims to provide a practical clinical review of the currently available background data on PSMA PET/CT, as well as the clinical implications. Although a large amount of data already exist, a thorough analysis is complicated by study heterogeneity, showing the need for future systematic and prospective research. Abstract The importance of PSMA PET/CT in both primary diagnostics and prostate cancer recurrence has grown steadily since its introduction more than a decade ago. Over the past years, a vast amount of data have been published on the diagnostic accuracy and the impact of PSMA PET/CT on patient management. Nevertheless, a large heterogeneity between studies has made reaching a consensus difficult; this review aims to provide a comprehensive clinical review of the available scientific literature, covering the currently known data on physiological and pathological PSMA expression, influencing factors, the differences and pitfalls of various tracers, as well as the clinical implications in initial TNM-staging and in the situation of biochemical recurrence. This review has the objective of providing a practical clinical overview of the advantages and disadvantages of the examination in various clinical situations and the body of knowledge available, as well as open questions still requiring further research.
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17
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Orevi M, Ben-Haim S, Abourbeh G, Chicheportiche A, Mishani E, Yutkin V, Gofrit ON. False Positive Findings of [18F]PSMA-1007 PET/CT in Patients After Radical Prostatectomy with Undetectable Serum PSA Levels. Front Surg 2022; 9:943760. [PMID: 35813044 PMCID: PMC9263625 DOI: 10.3389/fsurg.2022.943760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Accepted: 06/07/2022] [Indexed: 11/13/2022] Open
Abstract
Background PET-CT using prostate-specific membrane antigen (PSMA)-targeting radiopharmaceuticals labeled with 68Ga or 18F has emerged as the most sensitive staging tool in prostate cancer (PC). Nonetheless, the occurrence of false positive (FP) findings presents a major concern of this approach. In this prospective study, we investigated the frequency and pattern of false-positive findings of [18F]PSMA-1007 PET/CT in patients after radical prostatectomy with undetectable serum PSA levels. Any discrete non-physiological accumulation of [18F]PSMA-1007 in this population is by definition FP. Methods Seventeen men after radical prostatectomy, whose serum PSA levels were <0.05 ng/mL at 2–24 months after surgery were prospectively recruited. PET/CT was acquired at both 1 and 2 h after injection of [18F]PSMA-1007. Findings Three studies (18%) were interpreted as completely normal. Thirty-five foci of “non-physiological” uptake were observed in the remaining 14 (82%) patients, including a single skeletal focus in four patients, multiple skeletal foci in five patients and soft tissue uptake in eight, including in a desmoid tumor and in pelvic lymphocele. The SUVmax of all lesions was in the range of 1–7, except for the desmoid tumor which measured 12.7. All foci were visible in both the 1- and the 2 h studies, presenting a minor (<10%), statistically insignificant increase of SUVmax during this time-interval. Interpretation FP [18F]PSMA-1007-avid foci are found in about 80% of patients with undetectable serum PSA levels. Thus, focal uptake of [18F]PSMA-1007 outside its physiological distribution is not a categorical sign of metastasis and can arise from non-specific uptake of the ligand. The interpretation of [18F]PSMA-1007 PET/CT studies should always consider the clinical context, and lesions with SUVmax < 7 are suspicious for FP.
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Affiliation(s)
- Marina Orevi
- Department of Nuclear Medicine and Medical Biophysics, Faculty of Medicine, Hebrew University of Jerusalem, Hadassah Medical Center, Jerusalem, Israel
| | - Simona Ben-Haim
- Department of Nuclear Medicine and Medical Biophysics, Faculty of Medicine, Hebrew University of Jerusalem, Hadassah Medical Center, Jerusalem, Israel
- University College London and UCL Hospitals, NHS Trust, London, United Kingdom
| | - Galith Abourbeh
- Cyclotron/Radiochemistry Unit, Hadassah Medical Center, Jerusalem, Israel
| | | | - Eyal Mishani
- Cyclotron/Radiochemistry Unit, Hadassah Medical Center, Jerusalem, Israel
| | - Vladimir Yutkin
- Department of Urology, Faculty of Medicine, Hebrew University of Jerusalem, Hadassah Medical Center, Jerusalem, Israel
| | - Ofer N. Gofrit
- Department of Urology, Faculty of Medicine, Hebrew University of Jerusalem, Hadassah Medical Center, Jerusalem, Israel
- Correspondence: Ofer N. Gofrit
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18
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Lengana T, Lawal I, Janse Van Rensburg C, Mokoala K, Moshokoa E, Mazibuko S, Van de Wiele C, Maes A, Vorster M, Sathekge MM. The Diagnostic Performance of 18F-PSMA-1007 PET/CT in Prostate Cancer Patients with Early Recurrence after Definitive Therapy with a PSA <10 ng/ml. Nuklearmedizin 2022; 61:120-129. [PMID: 35421900 DOI: 10.1055/a-1759-1603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
AIM The prostate bed is one of the common sites of early recurrence of prostate cancer. The currently used PSMA ligands (68Ga-PSMA-11 and 99mTc-PSMA) undergo early urinary clearance resulting in interfering physiological activity within and surrounding the prostate. This can result in sites of cancer recurrence being obscured. 18F-PSMA-1007 has an advantage of delayed urinary clearance thus the prostate region is reviewed without any interfering physiological activity. The aim of this study was to determine the diagnostic performance of 18F-PSMA-1007 PET/CT in patients with early biochemical recurrence after definitive therapy. METHODS Forty-six Prostate cancer (mean age 66.7±7.5, range 48-87 years) presenting with biochemical recurrence (median PSA 1.6ng/ml, range 0.1-10.0) underwent non-contrast-enhanced 18F-PSMA-1007 PET/CT. PET/CT findings were evaluated qualitatively and semiquantitatively (SUVmax) and compared to the results of histology, Gleason grade, and conventional imaging. RESULTS Twenty-four of the 46 (52.2%) patients demonstrated a site of recurrence on 18F-PSMA-1007 PET/CT. Oligometastatic disease was detected in 15 (32.6%) of these patients. Of these 10 (37.5%) demonstrated intra-prostatic recurrence, lymph node disease was noted in 11 (45.8%) whilst two patients demonstrated skeletal metastases. The detection rates for PSA levels 0-<0.5, 0.5-<1, 1-2, >2 were 31.3%, 33.3%, 55.6% and 72.2% respectively. 7 (29.2%) of the positive patients had been described as negative or equivocal on conventional imaging. An optimal PSA cut-off level of 1.3ng/ml was found. CONCLUSION 18F-PSMA-1007 demonstrated good diagnostic performance detecting sites of recurrence. Its ability to detect sites of recurrence in the setting of early biochemical recurrence will have a significant impact on patient management.
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Affiliation(s)
- Thabo Lengana
- Nuclear Medicine, University of Pretoria, Pretoria, South Africa
| | - Ismaheel Lawal
- Nuclear Medicine, University of Pretoria, Pretoria, South Africa
| | - Charl Janse Van Rensburg
- Biostatistics Unit, Pretoria MRC, South African Medical Research Council, Pretoria, South Africa
| | - Kgomotso Mokoala
- Nuclear Medicine, University of Pretoria, Pretoria, South Africa
| | | | | | - Christophe Van de Wiele
- Nuclear Medicine, Universiteit Gent Faculteit Geneeskunde en Gezondheidswetenschappen, Gent, Belgium
| | - Alex Maes
- Department Nuclear Medicine, University Hospital Leuven, Kortrijk, Belgium
| | - Mariza Vorster
- Nuclear Medicine, University of Pretoria, Pretoria, South Africa
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19
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Detection efficacy of PET/CT with 18F-FSU-880 in patients with suspected recurrent prostate cancer: a prospective single-center study. Ann Nucl Med 2022; 36:302-309. [DOI: 10.1007/s12149-021-01704-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Accepted: 11/28/2021] [Indexed: 11/25/2022]
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20
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Ong JS, Hofman MS. PET imaging of prostate cancer. Nucl Med Mol Imaging 2022. [DOI: 10.1016/b978-0-12-822960-6.00111-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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21
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18F-PSMA-1007 PET in Biochemical Recurrent Prostate Cancer: An Updated Meta-Analysis. CONTRAST MEDIA & MOLECULAR IMAGING 2021; 2021:3502389. [PMID: 35002568 PMCID: PMC8710160 DOI: 10.1155/2021/3502389] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 10/05/2021] [Accepted: 12/07/2021] [Indexed: 12/29/2022]
Abstract
Background Prostate-specific membrane antigen- (PSMA-) targeted agents labeled with fluorine-18 (18F) have recently become available to evaluate patients with biochemical recurrent prostate cancer (BRPCa) by using positron emission tomography/computed tomography (PET/CT) or positron emission tomography/magnetic resonance imaging (PET/MRI). We performed a systematic review and meta-analysis about the detection rate (DR) of 18F-PSMA-1007 PET/CT or PET/MRI in BRPCa patients. Methods A comprehensive computer literature search of PubMed/MEDLINE, EMBASE, and Cochrane Library databases for studies published through 17 May 2021 was carried out using the following search algorithm: “PSMA” AND “1007”. Only studies providing data on the DR of 18F-PSMA-1007 PET/CT or PET/MRI in BRPCa were included. A random-effects model was used to calculate the pooled DR on a per scan basis. Results Fifteen articles (853 patients) were selected and included in the systematic review, and ten were included in the quantitative analysis. Most of the studies reported a good DR of 18F-PSMA-1007 PET/CT or PET/MRI in BRPCa including also patients with low prostate-specific membrane antigen (PSA) values. The DR of 18F-PSMA-1007 PET/CT or PET/MRI was dependent on PSA serum values. The pooled DR was 81.3% (95% confidence interval: 74.6–88%) with statistical heterogeneity. A significant reporting bias (publication bias) was not detected. Conclusions 18F-PSMA-1007 PET/CT or PET/MRI showed a good DR in BRPCa patients in line with other PSMA-targeted agents. The DR of 18F-PSMA-1007 PET/CT or PET/MRI is influenced by serum PSA values. These findings should be confirmed by prospective multicentric trials.
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22
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Kessel K, Seifert R, Weckesser M, Boegemann M, Huss S, Kratochwil C, Haberkorn U, Giesel F, Rahbar K. Prostate-specific membrane antigen and fibroblast activation protein distribution in prostate cancer: preliminary data on immunohistochemistry and PET imaging. Ann Nucl Med 2021; 36:293-301. [PMID: 34854061 PMCID: PMC8897381 DOI: 10.1007/s12149-021-01702-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 11/24/2021] [Indexed: 11/30/2022]
Abstract
Introduction Fibroblast activation protein (FAP) has been recently presented as new imaging target for malignant diseases and offers high contrast to surrounding normal tissue. FAP tracer uptake has been reported in various tumor entities. The aim of this study was to compare FAP and Prostate-specific membrane antigen (PSMA) expression in primary prostate cancer employing histological analyses and PET imaging in two small patient collectives.
Methods Two independent small patient collectives were included in this study. For cohort A, data of 5 prostate cancer patients and 3 patients with benign prostate hyperplasia were included. Patients with prostate cancer were initially referred for PSMA PET staging. Radical prostatectomy was performed in all patients and prostate specimen of patients and biopsies of healthy controls were available for further evaluation. Histological workup included HE and immunohistochemistry using PSMA Ab, FAP Ab. Cohort B consists of 6 Patients with diagnosed mCRPC and available PSMA as well as FAP PET. Results Patients with proven prostate cancer infiltration exhibited strong positivity for PSMA in both primary tumors and lymph node metastases while stainings for FAP were found positive in some cases, but not all (2/5). Controls with BPH presented moderate PSMA staining and in one case also with a positive FAP staining (1/3). PET imaging with FAP seemed to result in more precise results in case of low PSMA expression than PSMA-PET. Conclusions While PSMA staining intensity is a valid indicator of prostate cancer in both primary tumor and lymph node metastases, the expression of FAP seems to be heterogeneous but not necessarily linked to cancer-associated fibroblasts. It is also present in inflammation-associated myofibroblasts. Therefore, its ultimate role in prostate cancer diagnosis remains a subject of discussion.
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Affiliation(s)
- Katharina Kessel
- Department of Nuclear Medicine, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Münster, Germany.,Clinical Cooperation Unit Nuclear Medicine, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Robert Seifert
- Department of Nuclear Medicine, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Münster, Germany.,Department of Nuclear Medicine, University Hospital Essen, Essen, Germany.,Clinical Cooperation Unit Nuclear Medicine, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Matthias Weckesser
- Department of Nuclear Medicine, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Münster, Germany.,Clinical Cooperation Unit Nuclear Medicine, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Martin Boegemann
- Department of Urology, University Hospital Muenster, Münster, Germany.,Clinical Cooperation Unit Nuclear Medicine, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Sebastian Huss
- Gerhard-Domagk-Institute for Pathology, University Hospital Muenster, Münster, Germany.,Clinical Cooperation Unit Nuclear Medicine, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Clemens Kratochwil
- Department of Nuclear Medicine, University of Heidelberg, Heidelberg, Germany.,Clinical Cooperation Unit Nuclear Medicine, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Uwe Haberkorn
- Department of Nuclear Medicine, University of Heidelberg, Heidelberg, Germany.,Clinical Cooperation Unit Nuclear Medicine, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Translational Lung Research Center Heidelberg (TLRC), German Center for Lung Research (DZL), Heidelberg, Germany.,Department of Nuclear Medicine, University Hospital Düsseldorf, 40210, Düsseldorf, Germany
| | - Frederik Giesel
- Department of Nuclear Medicine, University of Heidelberg, Heidelberg, Germany.,Clinical Cooperation Unit Nuclear Medicine, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Department of Nuclear Medicine, University Hospital Düsseldorf, 40210, Düsseldorf, Germany
| | - Kambiz Rahbar
- Department of Nuclear Medicine, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Münster, Germany. .,Clinical Cooperation Unit Nuclear Medicine, German Cancer Research Center (DKFZ), Heidelberg, Germany.
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23
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Manafi-Farid R, Ranjbar S, Jamshidi Araghi Z, Pilz J, Schweighofer-Zwink G, Pirich C, Beheshti M. Molecular Imaging in Primary Staging of Prostate Cancer Patients: Current Aspects and Future Trends. Cancers (Basel) 2021; 13:5360. [PMID: 34771523 PMCID: PMC8582501 DOI: 10.3390/cancers13215360] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/17/2021] [Accepted: 10/19/2021] [Indexed: 12/19/2022] Open
Abstract
Accurate primary staging is the cornerstone in all malignancies. Different morphological imaging modalities are employed in the evaluation of prostate cancer (PCa). Regardless of all developments in imaging, invasive histopathologic evaluation is still the standard method for the detection and staging of the primary PCa. Magnetic resonance imaging (MRI) and computed tomography (CT) play crucial roles; however, functional imaging provides additional valuable information, and it is gaining ever-growing acceptance in the management of PCa. Targeted imaging with different radiotracers has remarkably evolved in the past two decades. [111In]In-capromab pendetide scintigraphy was a new approach in the management of PCa. Afterwards, positron emission tomography (PET) tracers such as [11C/18F]choline and [11C]acetate were developed. Nevertheless, none found a role in the primary staging. By introduction of the highly sensitive small molecule prostate-specific membrane antigen (PSMA) PET/CT, as well as recent developments in MRI and hybrid PET/MRI systems, non-invasive staging of PCa is being contemplated. Several studies investigated the role of these sophisticated modalities in the primary staging of PCa, showing promising results. Here, we recapitulate the role of targeted functional imaging. We briefly mention the most popular radiotracers, their diagnostic accuracy in the primary staging of PCa, and impact on patient management.
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Affiliation(s)
- Reyhaneh Manafi-Farid
- Research Center for Nuclear Medicine, Tehran University of Medical Sciences, Tehran 1411713135, Iran;
| | - Shaghayegh Ranjbar
- Department of Nuclear Medicine, Division of Molecular Imaging and Theranostics, University Hospital Salzburg, Paracelsus Medical University, Muellner Hauptstrasse 48, 5020 Salzburg, Austria; (S.R.); (Z.J.A.); (J.P.); (G.S.-Z.); (C.P.)
| | - Zahra Jamshidi Araghi
- Department of Nuclear Medicine, Division of Molecular Imaging and Theranostics, University Hospital Salzburg, Paracelsus Medical University, Muellner Hauptstrasse 48, 5020 Salzburg, Austria; (S.R.); (Z.J.A.); (J.P.); (G.S.-Z.); (C.P.)
| | - Julia Pilz
- Department of Nuclear Medicine, Division of Molecular Imaging and Theranostics, University Hospital Salzburg, Paracelsus Medical University, Muellner Hauptstrasse 48, 5020 Salzburg, Austria; (S.R.); (Z.J.A.); (J.P.); (G.S.-Z.); (C.P.)
| | - Gregor Schweighofer-Zwink
- Department of Nuclear Medicine, Division of Molecular Imaging and Theranostics, University Hospital Salzburg, Paracelsus Medical University, Muellner Hauptstrasse 48, 5020 Salzburg, Austria; (S.R.); (Z.J.A.); (J.P.); (G.S.-Z.); (C.P.)
| | - Christian Pirich
- Department of Nuclear Medicine, Division of Molecular Imaging and Theranostics, University Hospital Salzburg, Paracelsus Medical University, Muellner Hauptstrasse 48, 5020 Salzburg, Austria; (S.R.); (Z.J.A.); (J.P.); (G.S.-Z.); (C.P.)
| | - Mohsen Beheshti
- Department of Nuclear Medicine, Division of Molecular Imaging and Theranostics, University Hospital Salzburg, Paracelsus Medical University, Muellner Hauptstrasse 48, 5020 Salzburg, Austria; (S.R.); (Z.J.A.); (J.P.); (G.S.-Z.); (C.P.)
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24
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[ 68Ga]Ga-PSMA-11: The First FDA-Approved 68Ga-Radiopharmaceutical for PET Imaging of Prostate Cancer. Pharmaceuticals (Basel) 2021; 14:ph14080713. [PMID: 34451810 PMCID: PMC8401928 DOI: 10.3390/ph14080713] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 07/15/2021] [Accepted: 07/17/2021] [Indexed: 12/12/2022] Open
Abstract
For the positron emission tomography (PET) imaging of prostate cancer, radiotracers targeting the prostate-specific membrane antigen (PSMA) are nowadays used in clinical practice. Almost 10 years after its discovery, [68Ga]Ga-PSMA-11 has been approved in the United States by the Food and Drug Administration (FDA) as the first 68Ga-radiopharmaceutical for the PET imaging of PSMA-positive prostate cancer in 2020. This radiopharmaceutical combines the peptidomimetic Glu-NH-CO-NH-Lys(Ahx)-HBED-CC with the radionuclide 68Ga, enabling specific imaging of tumor cells expressing PSMA. Such a targeting approach may also be used for therapy planning as well as potentially for the evaluation of treatment response.
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25
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Wang R, Shen G, Huang M, Tian R. The Diagnostic Role of 18F-Choline, 18F-Fluciclovine and 18F-PSMA PET/CT in the Detection of Prostate Cancer With Biochemical Recurrence: A Meta-Analysis. Front Oncol 2021; 11:684629. [PMID: 34222008 PMCID: PMC8249319 DOI: 10.3389/fonc.2021.684629] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 05/31/2021] [Indexed: 02/05/2023] Open
Abstract
Background Diagnosing the biochemical recurrence (BCR) of prostate cancer (PCa) is a clinical challenge, and early detection of BCR can help patients receive optimal treatment. We conducted a meta-analysis to define the diagnostic accuracy of PET/CT using 18F-labeled choline, fluciclovine, and prostate-specific membrane antigen (PSMA) in patients with BCR. Methods Multiple databases were searched until March 30, 2021. We included studies investigating the diagnostic accuracy of 18F-choline, 18F-fluciclovine, and 18F-PSMA PET/CT in patients with BCR. The pooled sensitivity, specificity, and detection rate of 18F-labeled tracers were calculated with a random-effects model. Results A total of 46 studies met the included criteria; 17, 16, and 13 studies focused on 18F-choline, fluciclovine, and PSMA, respectively. The pooled sensitivities of 18F-choline and 18F-fluciclovine were 0.93 (95% CI, 0.85–0.98) and 0.80 (95% CI, 0.65–0.897), and the specificities were 0.91 (95% CI, 0.73–0.97) and 0.66 (95% CI, 0.50–0.79), respectively. The pooled detection rates of 18F-labeled choline, fluciclovine and PSMA were 66, 74, and 83%, respectively. Moreover, the detection rates of 18F-labeled choline, fluciclovine, and PSMA were 35, 23, and 58% for a PSA level less than 0.5 ng/ml; 41, 46, and 75% for a PSA level of 0.5–0.99 ng/ml; 62, 57, and 86% for a PSA level of 1.0–1.99 ng/ml; 80, 92, and 94% for a PSA level more than 2.0 ng/ml. Conclusion These three 18F-labeled tracers are promising for detecting BCR in prostate cancer patients, with 18F-choline showing superior diagnostic accuracy. In addition, the much higher detection rates of 18F-PSMA showed its superiority over other tracers, particularly in low PSA levels. Systematic Review Registration PROSPERO, identifier CRD42020212531.
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Affiliation(s)
- Rang Wang
- Department of Nuclear Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Guohua Shen
- Department of Nuclear Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Mingxing Huang
- Department of Nuclear Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Rong Tian
- Department of Nuclear Medicine, West China Hospital, Sichuan University, Chengdu, China
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26
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Scobioala S, Kittel C, Wolters H, Huss S, Elsayad K, Seifert R, Stegger L, Weckesser M, Haverkamp U, Eich HT, Rahbar K. Diagnostic efficiency of hybrid imaging using PSMA ligands, PET/CT, PET/MRI and MRI in identifying malignant prostate lesions. Ann Nucl Med 2021; 35:628-638. [PMID: 33742373 PMCID: PMC8079339 DOI: 10.1007/s12149-021-01606-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 03/10/2021] [Indexed: 12/26/2022]
Abstract
OBJECTIVE The objective of this study was to assess the accuracy of 68Ga-PSMA-11 PET/MRI, 18F-PSMA-1007 PET/CT, 68Ga-PSMA-11 PET/CT, and multiparametric (mp)MRI for the delineating of dominant intraprostatic lesions (IPL). MATERIALS AND METHODS 35 patients with organ-confined prostate cancer who were assigned to definitive radiotherapy (RT) were divided into three groups based on imaging techniques: 68Ga-PSMA-PET/MRI (n = 9), 18F-PSMA-PET/CT (n = 16) and 68Ga-PSMA-PET/CT (n = 10). All patients without PSMA-PET/MRI received an additional mpMRI. PSMA-PET-based automatic isocontours and manual contours of the dominant IPLs were generated for each modality. The biopsy results were then used to validate whether any of the prostate biopsies were positive in the marked lesion using Dice similarity coefficient (DSC), Youden index (YI), sensitivity and specificity. Factors that can predict the accuracy of IPLs contouring were analysed. RESULTS Diagnostic performance was significantly superior both for manual and automatic IPLs contouring using 68Ga-PSMA-PET/MRI (DSC/YI SUV70%-0.62/0.51), 18F-PSMA-PET/CT (DSC/YI SUV70%-0.67/0.53) or 68Ga-PSMA-PET/CT (DSC/YI SUV70%-0.63/0.51) compared to mpMRI (DSC/YI-0.47/0.41; p < 0.001). The accuracy for delineating IPLs was not improved by combination of PET/CT and mpMRI images compared to PET/CT alone. Significantly superior diagnostic accuracy was found for large prostate lesions (at least 15% from the prostate volume) and higher Gleason score (at least 7b) comparing to smaller lesions with lower GS. CONCLUSION IPL localization was significantly improved when using PSMA-imaging procedures compared to mpMRI. No significant difference for delineating IPLs was found between hybrid method PSMA-PET/MRI and PSMA-PET/CT. PSMA-based imaging technique should be considered for the diagnostics of IPLs and focal treatment modality.
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Affiliation(s)
- Sergiu Scobioala
- Department of Radiation Oncology, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Muenster, Germany.
- West German Cancer Center, Muenster and Essen, Germany.
| | - Christopher Kittel
- Department of Radiation Oncology, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Muenster, Germany
- West German Cancer Center, Muenster and Essen, Germany
| | - Heidi Wolters
- Department of Radiation Oncology, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Muenster, Germany
- West German Cancer Center, Muenster and Essen, Germany
| | - Sebastian Huss
- Department of Pathology, University Hospital of Muenster, Muenster, Germany
- West German Cancer Center, Muenster and Essen, Germany
| | - Khaled Elsayad
- Department of Radiation Oncology, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Muenster, Germany
- West German Cancer Center, Muenster and Essen, Germany
| | - Robert Seifert
- Department of Nuclear Medicine, University Hospital of Muenster, Muenster, Germany
- West German Cancer Center, Muenster and Essen, Germany
| | - Lars Stegger
- Department of Nuclear Medicine, University Hospital of Muenster, Muenster, Germany
- West German Cancer Center, Muenster and Essen, Germany
| | - Matthias Weckesser
- Department of Nuclear Medicine, University Hospital of Muenster, Muenster, Germany
- West German Cancer Center, Muenster and Essen, Germany
| | - Uwe Haverkamp
- Department of Radiation Oncology, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Muenster, Germany
- West German Cancer Center, Muenster and Essen, Germany
| | - Hans Theodor Eich
- Department of Radiation Oncology, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Muenster, Germany
- West German Cancer Center, Muenster and Essen, Germany
| | - Kambiz Rahbar
- Department of Nuclear Medicine, University Hospital of Muenster, Muenster, Germany
- West German Cancer Center, Muenster and Essen, Germany
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27
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Ahmadi Bidakhvidi N, Laenen A, Jentjens S, Deroose CM, Van Laere K, De Wever L, Mai C, Berghen C, De Meerleer G, Haustermans K, Joniau S, Everaerts W, Goffin K. Parameters predicting [ 18F]PSMA-1007 scan positivity and type and number of detected lesions in patients with biochemical recurrence of prostate cancer. EJNMMI Res 2021; 11:41. [PMID: 33929626 PMCID: PMC8087750 DOI: 10.1186/s13550-021-00783-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Accepted: 04/21/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Detection of the site of recurrence using PSMA-PET/CT is important to guide treatment in patients with biochemical recurrence of prostate cancer (PCa). The aim of this study was to evaluate the positivity rate of [18F]PSMA-1007-PET/CT in patients with biochemically recurrent PCa and identify parameters that predict scan positivity as well as the type and number of detected lesions. This monocentric retrospective study included 137 PCa patients with biochemical recurrence who underwent one or more [18F]PSMA-1007-PET/CT scans between August 2018 and June 2019. PET-positive malignant lesions were classified as local recurrence, lymph node (LN), bone or soft tissue lesions. The association between biochemical/paraclinical parameters, as PSA value, PSA doubling time, PSA velocity, Gleason score (GS) and androgen deprivation therapy (ADT), and scan positivity as well as type and number of detected lesions was evaluated using logistic regression analysis (binary outcomes) and Poisson models (count-type outcomes). RESULTS We included 175 [18F]PSMA-1007-PET/CT scans after radical prostatectomy (78%), external beam radiation therapy (8.8%), ADT (7.3%), brachytherapy (5.1%) and high intensity focused ultrasound (0.7%) as primary treatment (median PSA value 1.6 ng/ml). Positivity rate was 80%. PSA value and PSA velocity were significant predictors of scan positivity as well as of the presence of bone and soft tissue lesions and number of bone, LN and soft tissue lesions, both in uni- and/or multivariable analysis. Multivariable analysis also showed prior ADT as predictor of bone and soft tissue lesions, GS as predictor of the number of bone lesions and ongoing ADT as predictor of the number of LN lesions. CONCLUSION [18F]PSMA-1007-PET/CT showed a high positivity rate in patients with biochemically recurrent PCa. PSA value and PSA velocity were significant predictors of scan positivity as well as of the presence and number of bone and soft tissue lesions and the number of LN lesions. Our findings can guide clinicians in optimal patient selection for [18F]PSMA-1007-PET/CT and support further research leading to the development of a prediction nomogram.
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Affiliation(s)
| | - Annouschka Laenen
- Interuniversity Institute for Biostatistics and Statistical Bioinformatics, 3000, Leuven, Belgium
| | - Sander Jentjens
- Department of Nuclear Medicine, University Hospitals Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Christophe M Deroose
- Department of Nuclear Medicine, University Hospitals Leuven, Herestraat 49, 3000, Leuven, Belgium.,Nuclear Medicine and Molecular Imaging, Department of Imaging and Pathology, KU Leuven, 3000, Leuven, Belgium
| | - Koen Van Laere
- Department of Nuclear Medicine, University Hospitals Leuven, Herestraat 49, 3000, Leuven, Belgium.,Nuclear Medicine and Molecular Imaging, Department of Imaging and Pathology, KU Leuven, 3000, Leuven, Belgium
| | - Liesbeth De Wever
- Department of Radiology, University Hospitals Leuven, 3000, Leuven, Belgium
| | - Cindy Mai
- Department of Radiology, University Hospitals Leuven, 3000, Leuven, Belgium
| | - Charlien Berghen
- Department of Radiation Oncology, University Hospitals Leuven, 3000, Leuven, Belgium
| | - Gert De Meerleer
- Department of Radiation Oncology, University Hospitals Leuven, 3000, Leuven, Belgium.,Laboratory of Experimental Radiotherapy, Department of Oncology, KU Leuven, 3000, Leuven, Belgium
| | - Karin Haustermans
- Department of Radiation Oncology, University Hospitals Leuven, 3000, Leuven, Belgium.,Laboratory of Experimental Radiotherapy, Department of Oncology, KU Leuven, 3000, Leuven, Belgium
| | - Steven Joniau
- Department of Urology, University Hospitals Leuven, 3000, Leuven, Belgium.,Urogenital, Abdominal and Plastic Surgery, Department of Development and Regeneration, KU Leuven, 3000, Leuven, Belgium
| | - Wouter Everaerts
- Department of Urology, University Hospitals Leuven, 3000, Leuven, Belgium.,Urogenital, Abdominal and Plastic Surgery, Department of Development and Regeneration, KU Leuven, 3000, Leuven, Belgium
| | - Karolien Goffin
- Department of Nuclear Medicine, University Hospitals Leuven, Herestraat 49, 3000, Leuven, Belgium.,Nuclear Medicine and Molecular Imaging, Department of Imaging and Pathology, KU Leuven, 3000, Leuven, Belgium
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Kinetic analysis and optimisation of 18F-rhPSMA-7.3 PET imaging of prostate cancer. Eur J Nucl Med Mol Imaging 2021; 48:3723-3731. [PMID: 33846844 PMCID: PMC8440272 DOI: 10.1007/s00259-021-05346-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 03/29/2021] [Indexed: 12/01/2022]
Abstract
Purpose This phase 1 open-label study evaluated the uptake kinetics of a novel theranostic PET radiopharmaceutical, 18F-rhPSMA-7.3, to optimise its use for imaging of prostate cancer. Methods Nine men, three with high-risk localised prostate cancer, three with treatment-naïve hormone-sensitive metastatic disease and three with castration-resistant metastatic disease, underwent dynamic 45-min PET scanning of a target area immediately post-injection of 300 MBq 18F-rhPSMA-7.3, followed by two whole-body PET/CT scans acquired from 60 and 90 min post-injection. Volumes of interest (VoIs) corresponding to prostate cancer lesions and reference tissues were recorded. Standardised uptake values (SUV) and lesion-to-reference ratios were calculated for 3 time frames: 35–45, 60–88 and 90–118 min. Net influx rates (Ki) were calculated using Patlak plots. Results Altogether, 44 lesions from the target area were identified. Optimal visual lesion detection started 60 min post-injection. The 18F-rhPSMA-7.3 signal from prostate cancer lesions increased over time, while reference tissue signals remained stable or decreased. The mean (SD) SUV (g/mL) at the 3 time frames were 8.4 (5.6), 10.1 (7) and 10.6 (7.5), respectively, for prostate lesions, 11.2 (4.3), 13 (4.8) and 14 (5.2) for lymph node metastases, and 4.6 (2.6), 5.7 (3.1) and 6.4 (3.5) for bone metastases. The mean (SD) lesion-to-reference ratio increases from the earliest to the 2 later time frames were 40% (10) and 59% (9), respectively, for the prostate, 65% (27) and 125% (47) for metastatic lymph nodes and 25% (19) and 32% (30) for bone lesions. Patlak plots from lesion VoIs signified almost irreversible uptake kinetics. Ki, SUV and lesion-to-reference ratio estimates showed good agreement. Conclusion 18F-rhPSMA-7.3 uptake in prostate cancer lesions was high. Lesion-to-background ratios increased over time, with optimal visual detection starting from 60 min post-injection. Thus, 18F-rhPSMA-7.3 emerges as a very promising PET radiopharmaceutical for diagnostic imaging of prostate cancer. Trial Registration NCT03995888 (24 June 2019). Supplementary Information The online version contains supplementary material available at 10.1007/s00259-021-05346-8.
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Bagguley D, Ong S, Buteau JP, Koschel S, Dhiantravan N, Hofman MS, Emmett L, Murphy DG, Lawrentschuk N. Role of PSMA PET/CT imaging in the diagnosis, staging and restaging of prostate cancer. Future Oncol 2021; 17:2225-2241. [PMID: 33724868 DOI: 10.2217/fon-2020-1293] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Prostate-specific membrane antigen (PSMA) PET/CT is a novel imaging technique for the detection and staging of either primary or recurrent prostate cancer. Early studies demonstrated its improved sensitivity and specificity over and in combination with other currently employed imaging techniques, such as multiparametric MRI, bone scan, PET and CT. However, the lack of strength and confidence in these studies has meant incorporation of PSMA PET/CT into clinical guidelines and practice has been limited to date. In response, a number of high-quality prospective studies have recently emerged and reflect exciting results seen in preceding publications. Here we recount some of the key earlier publications, report results from the latest studies and look to the future discussing some of the eagerly awaited ongoing clinical trials.
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Affiliation(s)
- Dominic Bagguley
- Division of Cancer Surgery, Peter MacCallum Cancer Centre, Melbourne, 3000, Australia.,EJ Whitten Prostate Cancer Research Centre at Epworth, Melbourne, 3121, Australia
| | - Sean Ong
- Division of Cancer Surgery, Peter MacCallum Cancer Centre, Melbourne, 3000, Australia.,EJ Whitten Prostate Cancer Research Centre at Epworth, Melbourne, 3121, Australia
| | - James P Buteau
- Molecular Imaging & Therapeutic Nuclear Medicine, Peter MacCallum Cancer Centre, Melbourne, 3000, Australia
| | - Sam Koschel
- Division of Cancer Surgery, Peter MacCallum Cancer Centre, Melbourne, 3000, Australia
| | - Nattakorn Dhiantravan
- Molecular Imaging & Therapeutic Nuclear Medicine, Peter MacCallum Cancer Centre, Melbourne, 3000, Australia
| | - Michael S Hofman
- Molecular Imaging & Therapeutic Nuclear Medicine, Peter MacCallum Cancer Centre, Melbourne, 3000, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, 3000, Australia
| | - Louise Emmett
- St Vincent's Hospital Nuclear Medicine & PET Department, Darlinghurst, 2010, Australia
| | - Declan G Murphy
- Division of Cancer Surgery, Peter MacCallum Cancer Centre, Melbourne, 3000, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, 3000, Australia
| | - Nathan Lawrentschuk
- Division of Cancer Surgery, Peter MacCallum Cancer Centre, Melbourne, 3000, Australia.,EJ Whitten Prostate Cancer Research Centre at Epworth, Melbourne, 3121, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, 3000, Australia.,Department of Urology, Royal Melbourne Hospital, Parkville, 3000, Australia.,Department of Surgery, University of Melbourne, Austin Hospital, Heidelberg, 3084, Australia
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Alberts I, Niklas-Hünermund J, Sachpekidis C, Zacho HD, Mingels C, Dijkstra L, Bohn KP, Läppchen T, Gourni E, Rominger A, Afshar-Oromieh A. Combination of Forced Diuresis with Additional Late Imaging in 68Ga-PSMA-11 PET/CT: Effects on Lesion Visibility and Radiotracer Uptake. J Nucl Med 2021; 62:1252-1257. [PMID: 33547214 DOI: 10.2967/jnumed.120.257741] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 12/28/2020] [Indexed: 11/16/2022] Open
Abstract
Renal excretion of some prostate-specific membrane antigen (PSMA) ligands and consequently increased bladder activity can obscure locally relapsing prostate cancer lesions in PSMA PET/CT. Furthermore, additional late imaging in PSMA PET/CT provides a useful method to clarify uncertain findings. The aim of this retrospective study was to investigate a modified imaging protocol combining late additional imaging with hydration and forced diuresis in individuals undergoing additional late scanning for uncertain lesions or low prostate-specific antigen. Methods: We compared an older protocol with a newer one. In the old protocol, patients undergoing 68Ga-PSMA-11 PET/CT were examined at 90 min after injection, with 1 L of oral hydration beginning at 30 min after injection and 20 mg of furosemide given intravenously at 1 h after injection, followed by additional late imaging at 2.5 h after injection without further preparation. In the new protocol, a second group received the same procedure as before, with an additional 0.5 L of oral hydration and 10 mg of furosemide intravenously 30 min before the late imaging. We examined 132 patients (76 with the old protocol and 56 with the new one) with respect to urinary bladder activity (SUVmean), prostate cancer lesion uptake (SUVmax), and lesion contrast (ratio of tumor SUVmax to bladder SUVmean for local relapses and ratio of tumor SUVmax to gluteal-muscle SUVmean for nonlocal prostate cancer lesions). Results: Bladder activity was significantly greater for the old protocol in the late scans than for the new protocol (ratio of bladder activity at 2.5 h to bladder activity at 1.5 h, 2.33 ± 1.17 vs. 1.37 ± 0.50, P < 0.0001). Increased tumor SUVmax and contrast were seen at 2.5 h compared with 1.5 h (P < 0.0001 for old protocol; P = 0.02 for new protocol). Increased bladder activity for the old protocol resulted in decreased lesion-to-bladder contrast, which was not the case for the new protocol. Tumor-to-background ratios increased at late imaging for both protocols, but the increase was significantly lower for the new protocol. For the old protocol, comparing the 1.5-h to the 2.5-h acquisitions, 4 lesions in 4 patients (4/76 = 5.2% of the cohort) were visible at the postdiuresis 1.5-h acquisition but not at 2.5 h, having been obscured as a result of the higher bladder activity. In the new protocol, 2 of 56 (3.6%) patients had lesions visible only at late imaging, and 2 patients had lesions that could be better discriminated at late imaging. Conclusion: Although the combination of diuretics and hydration can be a useful method to increase the visualization and detectability of locally recurrent prostate cancer in standard 68Ga-PSMA-11 PET/CT, their effects do not sufficiently continue into additional late imaging. Additional diuresis and hydration are recommended to improve the visibility, detection, and diagnostic certainty of local recurrences.
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Affiliation(s)
- Ian Alberts
- Department of Nuclear Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; and
| | - Jan Niklas-Hünermund
- Department of Nuclear Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; and
| | - Christos Sachpekidis
- Department of Nuclear Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; and
| | | | - Clemens Mingels
- Department of Nuclear Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; and
| | - Lotte Dijkstra
- Department of Nuclear Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; and
| | - Karl Peter Bohn
- Department of Nuclear Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; and
| | - Tilman Läppchen
- Department of Nuclear Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; and
| | - Eleni Gourni
- Department of Nuclear Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; and
| | - Axel Rominger
- Department of Nuclear Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; and
| | - Ali Afshar-Oromieh
- Department of Nuclear Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; and
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Afshar-Oromieh A, da Cunha ML, Wagner J, Haberkorn U, Debus N, Weber W, Eiber M, Holland-Letz T, Rauscher I. Performance of [ 68Ga]Ga-PSMA-11 PET/CT in patients with recurrent prostate cancer after prostatectomy-a multi-centre evaluation of 2533 patients. Eur J Nucl Med Mol Imaging 2021; 48:2925-2934. [PMID: 33543325 PMCID: PMC8263399 DOI: 10.1007/s00259-021-05189-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 01/02/2021] [Indexed: 11/28/2022]
Abstract
PURPOSE To evaluate the performance of [68Ga]Ga-PSMA-11 PET/CT in the diagnosis of recurrent prostate cancer (PC) after prostatectomy in a large multicentre cohort. METHODS The centres, which contributed to this study, were the departments of nuclear medicine of Heidelberg (Germany), Technical University of Munich (Germany) and Albert Einstein Hospital of São Paulo (Brazil). A total of 2533 patients who were scanned with [68Ga]Ga-PSMA-11 PET/CT at 1 h p.i. due to recurrent PC after prostatectomy were included in this retrospective analysis. Exclusion criteria were as follows: patients with untreated primary tumour, previous chemotherapy or Xofigo®; those previously treated with exclusively external beam radiation therapy or HIFU; those referred for PSMA-therapy; and those treated with ADT (including first- and second-generation ADT) within the last 6 months. Potential influences of different factors such as PSA level, PSA doubling-time (PSADT), PSA velocity (PSAVel), Gleason Score (GSC, including the separate analysis of 7a and 7b), age and amount of injected tracer were evaluated in a multivariable analysis. RESULTS The rate of pathologic PET/CT-scans was 43% for PSA ≤ 0.2 ng/ml, 58% for PSA > 0.2 to ≤ 0.5, 72% for PSA > 0.5 to ≤ 1.0 and increased to a maximum of 93% for PSA > 10 ng/ml. A pathological PET/CT was significantly (p = 0.001) associated with PSA level and higher GSC. Amount of injected tracer, age, PSADT and PSAVel were not associated with a higher probability of a pathological scan. CONCLUSION [68Ga]Ga-PSMA-11 PET/CT at 1 h p.i. confirmed its high performance in the largest patient cohort yet analysed. Tumour detection showed a clear association with higher PSA and higher GSC. No association was found between a pathological [68Ga]Ga-PSMA-11 PET/CT and age, amount of injected tracer, PSADT or PSAVel.
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Affiliation(s)
- Ali Afshar-Oromieh
- Department of Nuclear Medicine, Heidelberg University Hospital, Heidelberg, Germany. .,Department of Nuclear Medicine, Inselspital, Bern University Hospital, University of Bern, Freiburgstr. 18, CH-3010, Bern, Switzerland.
| | | | - Jairo Wagner
- Department of Nuclear Medicine, Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Uwe Haberkorn
- Department of Nuclear Medicine, Heidelberg University Hospital, Heidelberg, Germany.,Clinical Cooperation Unit Nuclear Medicine, German Cancer Research Centre, Heidelberg, Germany
| | - Nils Debus
- Department of Nuclear Medicine, Heidelberg University Hospital, Heidelberg, Germany
| | - Wolfgang Weber
- Department of Nuclear Medicine, Technical University of Munich, Munich, Germany
| | - Matthias Eiber
- Department of Nuclear Medicine, Technical University of Munich, Munich, Germany
| | - Tim Holland-Letz
- Department of Biostatistics, German Cancer Research Center, Heidelberg, Germany
| | - Isabel Rauscher
- Department of Nuclear Medicine, Technical University of Munich, Munich, Germany
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Zhou X, Li Y, Jiang X, Wang X, Chen S, Shen T, You J, Lu H, Liao H, Li Z, Cheng Z. Intra-Individual Comparison of 18F-PSMA-1007 and 18F-FDG PET/CT in the Evaluation of Patients With Prostate Cancer. Front Oncol 2021; 10:585213. [PMID: 33604285 PMCID: PMC7884904 DOI: 10.3389/fonc.2020.585213] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 11/23/2020] [Indexed: 12/17/2022] Open
Abstract
Purpose 18F labelled PSMA-1007 presents promising results in detecting prostate cancer (PC), while some pitfalls exists meanwhile. An intra-individual comparison of 18F-FDG and 18F-PSMA-1007 in patients with prostate cancer were aimed to be performed in the present study. Then, the pitfalls of 18F-PSMA-1007 PET/CT in imaging of patients with prostate cancer were analyzed. Methods and Material 21 prostate cancer patients underwent 18F-PSMA-1007 PET/CT as well as 18F-FDG PET/CT before treatment. All positive lesions were noticed in both 18F-PSMA-1007 PET/CT and 18F-FDG PET/CT, then differentiated PC metastasis from benign lesions. the SUVmax, SUVmean and TBR of lesions, up to 10 metastases and 10 benign lesions per patients were recorded (5 for bone, 5 for soft tissue metastasis ). The distribution of positive lesions were analyzed for two imaging. Detection rates, SUVmax, SUVmean and TBR in 18F-PSMA-1007 PET/CT and 18F-FDG PET/CT were compared, respectively. The optimal cut-off values of SUVmax, SUVmean for metastases vs. benign lesions was found through areas under ROC in 18F-PSMA-1007. Results The detection rates of primary lesions in 18F-PSMA-1007 PET/CT was higher than that of 18F-FDG PET/CT(100% (21/21) vs. 67%(14/21)). For extra- prostatic lesions, 18F-PSMA-1007 PET/CT revealed 124 positive lesions, 49(49/124, 40%) attributed to a benign origin; 18F-FDG PET/CT revealed 68 positive lesions, 14(14/68, 21%) attributed to a benign origin. The SUVmax, SUVmean, TBR of primary tumor in 18F-PSMA-1007 PET/CT was higher than that in 18F-FDG PET/CT (15.20 vs. 4.20 for SUVmax; 8.70 vs. 2.80 for SUVmean; 24.92 vs. 4.82 for TBR, respectively); The SUVmax, SUVmean, TBR of metastases in 18F-PSMA-1007 PET/CT was higher than that in 18F-FDG PET/CT (10.72 vs. 4.42 for SUVmax; 6.67 vs. 2.59 for SUVmean; The TBR of metastases was 13.3 vs. 7.91). For 18F-FDG PET/CT, the SUVmax, SUVmean in metastases was higher than that in benign lesions (4.42 vs. 3.04 for SUVmax, 2.59 vs. 1.75 for SUVmean, respectively). Similarly, for 18F-PSMA-1007 PET/CT, the SUVmax, SUVmean in metastases was significantly higher than that in benign lesions(10.72 vs. 3.14 for SUVmax, 6.67 vs. 1.91 for SUVmean, respectively), ROC suggested that SUVmax=7.71, SUVmean=5.35 might be the optimal cut-off values for metastases vs. benign lesions. Conclusion The pilot study suggested that 18F-PSMA-1007 showed superiority over 18F-FDG because its high detecting rate of PC lesions and excellent tumor uptake. While non-tumor uptake in 18F-PSMA-1007 may lead to misdiagnosis, recognizing these pitfalls and careful analysis can improve the accuracy of diagnosis.
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Affiliation(s)
- Xing Zhou
- Radiation Oncology Key Laboratory of Sichuan Province, PET/CT Centre, Sichuan Cancer Hospital, Chengdu, China.,Department of Nuclear Medicine, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - YingChun Li
- Department of Nuclear Medicine & Radiotherapy, Air Force Hospital of Western Theater Command, Chengdu, China
| | - Xiao Jiang
- Radiation Oncology Key Laboratory of Sichuan Province, PET/CT Centre, Sichuan Cancer Hospital, Chengdu, China
| | - XiaoXiong Wang
- Radiation Oncology Key Laboratory of Sichuan Province, PET/CT Centre, Sichuan Cancer Hospital, Chengdu, China
| | - ShiRong Chen
- Radiation Oncology Key Laboratory of Sichuan Province, PET/CT Centre, Sichuan Cancer Hospital, Chengdu, China
| | - TaiPeng Shen
- Radiation Oncology Key Laboratory of Sichuan Province, PET/CT Centre, Sichuan Cancer Hospital, Chengdu, China
| | - JinHui You
- Department of Nuclear Medicine, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Hao Lu
- Radiation Oncology Key Laboratory of Sichuan Province, PET/CT Centre, Sichuan Cancer Hospital, Chengdu, China
| | - Hong Liao
- Radiation Oncology Key Laboratory of Sichuan Province, Department of Urology, Sichuan Cancer Hospital, Chengdu, China
| | - Zeng Li
- Radiation Oncology Key Laboratory of Sichuan Province, Department of Urology, Sichuan Cancer Hospital, Chengdu, China
| | - ZhuZhong Cheng
- Radiation Oncology Key Laboratory of Sichuan Province, PET/CT Centre, Sichuan Cancer Hospital, Chengdu, China.,Department of Nuclear Medicine, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
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Rahbar K, Afshar-Oromieh A, Seifert R, Wagner S, Schäfers M, Bögemann M, Weckesser M. Do fasting or high caloric drinks affect the physiological uptake of fluorine-18 prostate-specific membrane antigen-1007 in liver and bowel? World J Nucl Med 2020; 19:220-223. [PMID: 33354176 PMCID: PMC7745857 DOI: 10.4103/wjnm.wjnm_6_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 02/14/2019] [Indexed: 12/03/2022] Open
Abstract
Recently introduced fluorine-18 prostate-specific membrane antigen-1007 (18F-PSMA-1007) for imaging prostate cancer has an intense physiologic liver uptake and biliary excretion. The aim of the present study was to evaluate the effect of different dietary conditions on this physiological uptake. Forty consecutive prostate cancer patients were scanned with 18F-PSMA-1007 positron emission tomography/computed tomography at different dietary conditions. In addition to a blinded read scoring, tracer uptake intensities (standardized uptake values [SUVs]) were measured in the liver and small bowel. There was no significant difference in liver and small-bowel uptake between different patient groups. Wilcoxon signed-rank tests revealed no significant difference of the median mean SUV of the liver or maximum SUV of the horizontal part of the duodenum between different dietary conditions groups. A dietary preparation of patients by fasting or the attempt to clear liver activity by high caloric drinks does not have a significant effect on tracer uptake in the liver or in the small bowel.
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Affiliation(s)
- Kambiz Rahbar
- Department of Nuclear Medicine, University Hospital Münster, Münster, Germany
| | - Ali Afshar-Oromieh
- Department of Nuclear Medicine, Inselspital, University Hospital of Bern, Bern, Switzerland.,Department of Nuclear Medicine, University Hospital of Heidelberg, Germany
| | - Robert Seifert
- Department of Nuclear Medicine, University Hospital Münster, Münster, Germany
| | - Stefan Wagner
- Department of Nuclear Medicine, University Hospital Münster, Münster, Germany
| | - Michael Schäfers
- Department of Nuclear Medicine, University Hospital Münster, Münster, Germany
| | - Martin Bögemann
- Department of Urology, University Hospital Münster, Münster, Germany
| | - Matthias Weckesser
- Department of Nuclear Medicine, University Hospital Münster, Münster, Germany
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Veerasuri S, Redman S, Graham R, Meehan C, Little D. Non-prostate uptake on 18F-PSMA-1007 PET/CT: a case of myeloma. BJR Case Rep 2020; 7:20200102. [PMID: 33841899 PMCID: PMC8008463 DOI: 10.1259/bjrcr.20200102] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 10/06/2020] [Accepted: 10/26/2020] [Indexed: 11/21/2022] Open
Abstract
Prostate-specific membrane antigen (PSMA), a glycoprotein that is highly expressed in prostate cancer, has been used as a target for molecular radiotherapy as well as imaging. Over the last couple of years, 18F-PSMA gained popularity due to its longer half-life (110 min) compared to gallium 68Ga-PSMA (68 min). This has helped the dissemination beyond large metropolitan centres. In addition, due to the low background activity in the urinary bladder (1.2% injected dose over 2 h compared to 10% injected dose over 2 h for 68Ga), 18F-PSMA helps detect local recurrence or spread to pelvic nodes more readily as lesions are not masked by physiological urinary excretion. Despite excellent sensitivities of PSMA positron emission tomography modalities, it is noteworthy that PSMA expression is not specific to the prostate. A variety of normal tissues express PSMA with intense uptake noted in salivary glands, lacrimal glands, the liver, spleen, pancreas, small intestine, bladder and renal cortex. In this case report, we describe an example of non-prostatic PSMA uptake in a patient imaged with 18F-PSMA-1007 positron emission tomography/CT that showed an avid lytic lesion in manubrium. The patient was subsequently proven by biopsy to have myeloma. Our case report illustrates a potential pitfall when imaging patients with 18F PSMA-1007 and adds to the growing body of literature of non-prostatic uptake of PSMA and highlights the need for reporters to be aware of this uptake.
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Affiliation(s)
- Sowmya Veerasuri
- Department of Radiology, Royal United Hospital, Combe Park, Bath, Avon, United Kingdom
| | - Stewart Redman
- Department of Radiology, Royal United Hospital, Combe Park, Bath, Avon, United Kingdom
| | - Richard Graham
- Department of Radiology, Royal United Hospital, Combe Park, Bath, Avon, United Kingdom
| | - Chris Meehan
- Department of Cellular Pathology, Royal United Hospital, Combe Park, Bath, Avon, United Kingdom
| | - David Little
- Department of Radiology, Royal United Hospital, Combe Park, Bath, Avon, United Kingdom
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35
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Begum NJ, Glatting G, Eiber M, Beer AJ, Kletting P. An in silico study on the effect of the radionuclide half-life on PET/CT imaging with PSMA-targeting radioligands. Nuklearmedizin 2020; 60:33-37. [PMID: 33137837 DOI: 10.1055/a-1253-1535] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AIM The aim of this work was to systematically investigate the influence of the radionuclide half-life and affinity of prostate-specific membrane antigen (PSMA)-targeting ligands on the activity concentration for PET/CT imaging. METHODS A whole-body physiologically-based pharmacokinetic (PBPK) model with individually estimated parameters of 13 patients with metastatic castration-resistant prostate cancer (mCRPC) was used to simulate the pharmacokinetics of PSMA-targeting radioligands. The simulations were performed with 68Ga (T1/2 = 1.13 h), 18F (T1/2 = 1.83 h), 64Cu (T1/2 = 12.7 h) and for different affinities (dissociation constants KD of 1-0.01 nM) and a commonly used ligand amount of 3 nmol. The activity concentrations were calculated at 1, 2, 3, 4, 8, 12, and 16 h after injection. RESULTS The highest tumor uptake was achieved 1 h p. i. for 68Ga-PSMA. For 18F-PSMA, the highest tumor uptake was at 1 h p. i. and 2 h p.i for dissociation constants KD = 1 nM and KD = 0.1-0.01 nM, respectively. For 64Cu-PSMA, the highest tumor uptake was at 4 h p. i. for dissociation constant KD = 1 nM and at 4 h p. i. (9 patients) and 8 h p. i. (4 patients) for higher affinities. Compared to 68Ga-PSMA (1 h p. i.), the activity concentrations in the tumor for 18F-PSMA (2 h p. i.) increased maximum 1.3-fold with minor differences for all affinities. For 64Cu-PSMA (4 h p. i.), the improvements were in the range of 2.8 to 3.2-fold for all affinities. CONCLUSIONS The simulations indicate that the highest tumor-to-background ratio can be achieved after 4 hours in PET/CT using high-affinity 64Cu-PSMA.
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Affiliation(s)
- Nusrat Jihan Begum
- Medical Radiation Physics, Department of Nuclear Medicine, Ulm University, Ulm, Germany
| | - Gerhard Glatting
- Medical Radiation Physics, Department of Nuclear Medicine, Ulm University, Ulm, Germany
| | - Matthias Eiber
- Klinikum rechts der Isar, Department of Nuclear Medicine, Technical University of Munich School of Medicine, München, Germany
| | - Ambros J Beer
- Department of Nuclear Medicine, Ulm University, Ulm, Germany
| | - Peter Kletting
- Medical Radiation Physics, Department of Nuclear Medicine, Ulm University, Ulm, Germany
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Draulans C, De Roover R, van der Heide UA, Kerkmeijer L, Smeenk RJ, Pos F, Vogel WV, Nagarajah J, Janssen M, Isebaert S, Maes F, Mai C, Oyen R, Joniau S, Kunze-Busch M, Goffin K, Haustermans K. Optimal 68Ga-PSMA and 18F-PSMA PET window levelling for gross tumour volume delineation in primary prostate cancer. Eur J Nucl Med Mol Imaging 2020; 48:1211-1218. [PMID: 33025093 DOI: 10.1007/s00259-020-05059-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 09/27/2020] [Indexed: 12/24/2022]
Abstract
PURPOSE This study proposes optimal tracer-specific threshold-based window levels for PSMA PET-based intraprostatic gross tumour volume (GTV) contouring to reduce interobserver delineation variability. METHODS Nine 68Ga-PSMA-11 and nine 18F-PSMA-1007 PET scans including GTV delineations of four expert teams (GTVmanual) and a majority-voted GTV (GTVmajority) were assessed with respect to a registered histopathological GTV (GTVhisto) as the gold standard reference. The standard uptake values (SUVs) per voxel were converted to a percentage (SUV%) relative to the SUVmax. The statistically optimised SUV% threshold (SOST) was defined as those that maximises accuracy for threshold-based contouring. A leave-one-out cross-validation receiver operating characteristic (ROC) curve analysis was performed to determine the SOST for each tracer. The SOST analysis was performed twice, first using the GTVhisto contour as training structure (GTVSOST-H) and second using the GTVmajority contour as training structure (GTVSOST-MA) to correct for any limited misregistration. The accuracy of both GTVSOST-H and GTVSOST-MA was calculated relative to GTVhisto in the 'leave-one-out' patient of each fold and compared with the accuracy of GTVmanual. RESULTS ROC curve analysis for 68Ga-PSMA-11 PET revealed a median threshold of 25 SUV% (range, 22-27 SUV%) and 41 SUV% (40-43 SUV%) for GTVSOST-H and GTVSOST-MA, respectively. For 18F-PSMA-1007 PET, a median threshold of 42 SUV% (39-45 SUV%) for GTVSOST-H and 44 SUV% (42-45 SUV%) for GTVSOST-MA was found. A significant pairwise difference was observed when comparing the accuracy of the GTVSOST-H contours with the median accuracy of the GTVmanual contours (median, - 2.5%; IQR, - 26.5-0.2%; p = 0.020), whereas no significant pairwise difference was found for the GTVSOST-MA contours (median, - 0.3%; IQR, - 4.4-0.6%; p = 0.199). CONCLUSIONS Threshold-based contouring using GTVmajority-trained SOSTs achieves an accuracy comparable with manual contours in delineating GTVhisto. The median SOSTs of 41 SUV% for 68Ga-PSMA-11 PET and 44 SUV% for 18F-PSMA-1007 PET form a base for tracer-specific window levelling. TRIAL REGISTRATION Clinicaltrials.gov ; NCT03327675; 31-10-2017.
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Affiliation(s)
- Cédric Draulans
- Department of Radiation Oncology, University Hospitals Leuven, Leuven, Belgium.
- Department of Oncology, KU Leuven, Leuven, Belgium.
| | - Robin De Roover
- Department of Radiation Oncology, University Hospitals Leuven, Leuven, Belgium
- Department of Oncology, KU Leuven, Leuven, Belgium
| | - Uulke A van der Heide
- Department of Radiation Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Linda Kerkmeijer
- Department of Radiation Oncology, Radboud University Medical Centre, Nijmegen, The Netherlands
- Department of Radiation Oncology, University Medical Centre, Utrecht, The Netherlands
| | - Robert J Smeenk
- Department of Radiation Oncology, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Floris Pos
- Department of Radiation Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Wouter V Vogel
- Department of Nuclear Medicine, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - James Nagarajah
- Department of Radiology & Nuclear Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Marcel Janssen
- Department of Radiology & Nuclear Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Sofie Isebaert
- Department of Radiation Oncology, University Hospitals Leuven, Leuven, Belgium
- Department of Oncology, KU Leuven, Leuven, Belgium
| | - Frederik Maes
- Department of Electrical Engineering, ESAT/PSI, KU Leuven, Leuven, Belgium
- Medical Imaging Research Centre, University Hospitals Leuven, Leuven, Belgium
| | - Cindy Mai
- Department of Radiology, University Hospitals Leuven, Leuven, Belgium
| | - Raymond Oyen
- Department of Radiology, University Hospitals Leuven, Leuven, Belgium
| | - Steven Joniau
- Department of Urology, University Hospitals Leuven, Leuven, Belgium
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium
| | - Martina Kunze-Busch
- Department of Radiation Oncology, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Karolien Goffin
- Department of Nuclear Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Karin Haustermans
- Department of Radiation Oncology, University Hospitals Leuven, Leuven, Belgium.
- Department of Oncology, KU Leuven, Leuven, Belgium.
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Cardinale J, Roscher M, Schäfer M, Geerlings M, Benešová M, Bauder-Wüst U, Remde Y, Eder M, Nováková Z, Motlová L, Barinka C, Giesel FL, Kopka K. Development of PSMA-1007-Related Series of 18F-Labeled Glu-Ureido-Type PSMA Inhibitors. J Med Chem 2020; 63:10897-10907. [PMID: 32852205 DOI: 10.1021/acs.jmedchem.9b01479] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In recent years, a number of drugs targeting the prostate-specific membrane antigen (PSMA) have become important tools in the diagnosis and treatment of prostate cancer. In the present work, we report on the synthesis and preclinical evaluation of a series of 18F-labeled PSMA ligands for diagnostic application based on the theragnostic ligand PSMA-617. By applying modifications to the linker structure, insight into the structure-activity relationship could be gained, highlighting the importance of hydrophilicity and stereoselectivity on interaction with PSMA and hence the biodistribution. Selected compounds were co-crystallized with the PSMA protein and analyzed by X-rays with mixed results. Among these, PSMA-1007 (compound 5) showed the best interaction with the PSMA protein. The respective radiotracer [18F]PSMA-1007 was translated into the clinic and is, in the meantime, subject of advanced clinical trials.
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Affiliation(s)
- Jens Cardinale
- Division of Radiopharmaceutical Chemistry, German Cancer Research Center, INF 280, 69120 Heidelberg, Germany
| | - Mareike Roscher
- Division of Radiopharmaceutical Chemistry, German Cancer Research Center, INF 280, 69120 Heidelberg, Germany
| | - Martin Schäfer
- Division of Radiopharmaceutical Chemistry, German Cancer Research Center, INF 280, 69120 Heidelberg, Germany
| | - Max Geerlings
- Division of Radiopharmaceutical Chemistry, German Cancer Research Center, INF 280, 69120 Heidelberg, Germany
| | - Martina Benešová
- Division of Radiopharmaceutical Chemistry, German Cancer Research Center, INF 280, 69120 Heidelberg, Germany
| | - Ulrike Bauder-Wüst
- Division of Radiopharmaceutical Chemistry, German Cancer Research Center, INF 280, 69120 Heidelberg, Germany
| | - Yvonne Remde
- Division of Radiopharmaceutical Chemistry, German Cancer Research Center, INF 280, 69120 Heidelberg, Germany
| | - Matthias Eder
- Division of Radiopharmaceutical Chemistry, German Cancer Research Center, INF 280, 69120 Heidelberg, Germany
| | - Zora Nováková
- Laboratory of Structural Biology, Institute of Biotechnology of the Czech Academy of Sciences, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Lucia Motlová
- Laboratory of Structural Biology, Institute of Biotechnology of the Czech Academy of Sciences, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Cyril Barinka
- Laboratory of Structural Biology, Institute of Biotechnology of the Czech Academy of Sciences, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Frederik L Giesel
- Department of Nuclear Medicine, University Hospital Heidelberg, INF 400, 69120 Heidelberg, Germany
| | - Klaus Kopka
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
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Foley RW, Redman SL, Graham RN, Loughborough WW, Little D. Fluorine-18 labelled prostate-specific membrane antigen (PSMA)-1007 positron-emission tomography-computed tomography: normal patterns, pearls, and pitfalls. Clin Radiol 2020; 75:903-913. [PMID: 32782128 DOI: 10.1016/j.crad.2020.06.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 06/30/2020] [Indexed: 11/15/2022]
Abstract
Prostate-specific membrane antigen (PSMA)-based positron-emission tomography (PET)-computed tomography (CT) has shown great promise in prostate cancer imaging. This technique has demonstrated particular utility in the staging of high-risk primary cancer and in the localisation of recurrent disease. The use of fluorine-18 PSMA-1007 is advantageous, as it is excreted via the hepatobiliary system rather than urinary and the longer half-life of fluorine-18 compared to gallium tracers, allows for PSMA imaging in centres without a gallium generator. However, imaging with this tracer is not without flaws and areas of ambiguity remain. In this article, the biodistribution, clinical indications, and pearls of 18F-PSMA-1007 PET-CT in patients with prostate cancer will be discussed, as well as the potential pitfalls in the reporting of these studies.
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Affiliation(s)
- R W Foley
- Royal United Hospitals Bath NHS Foundation Trust, Combe Park, Avon, Bath, BA1 3NG, UK
| | - S L Redman
- Royal United Hospitals Bath NHS Foundation Trust, Combe Park, Avon, Bath, BA1 3NG, UK
| | - R N Graham
- Royal United Hospitals Bath NHS Foundation Trust, Combe Park, Avon, Bath, BA1 3NG, UK
| | - W W Loughborough
- Royal United Hospitals Bath NHS Foundation Trust, Combe Park, Avon, Bath, BA1 3NG, UK
| | - D Little
- Royal United Hospitals Bath NHS Foundation Trust, Combe Park, Avon, Bath, BA1 3NG, UK.
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Abstract
Prostate cancer is the commonest malignancy to affect men in the United Kingdom. Extraprostatic disease detection at staging and in the setting of biochemical recurrence is essential in determining treatment strategy. Conventional imaging including computed tomography and bone scintigraphy are limited in their ability to detect sites of loco-regional nodal and metastatic bone disease, particularly at clinically relevant low prostate-specific antigen levels. The use of positron emission tomography-computed tomography has helped overcome these deficiencies and is leading a paradigm shift in the management of prostate cancer using a wide range of radiopharmaceuticals. Their mechanisms of action, utility in both staging and biochemical recurrence, and comparative strengths and weaknesses will be covered in this article.
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Affiliation(s)
- Manil Subesinghe
- King's College London & Guy's & St. Thomas' PET Centre, St. Thomas' Hospital, London, UK; Department of Cancer Imaging, School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK.
| | - Meghana Kulkarni
- Department of Cancer Imaging, School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK
| | - Gary J Cook
- King's College London & Guy's & St. Thomas' PET Centre, St. Thomas' Hospital, London, UK; Department of Cancer Imaging, School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK
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Ioppolo JA, Nezich RA, Richardson KL, Morandeau L, Leedman PJ, Price RI. Direct in vivo comparison of [18F]PSMA-1007 with [68Ga]Ga-PSMA-11 and [18F]AlF-PSMA-11 in mice bearing PSMA-expressing xenografts. Appl Radiat Isot 2020; 161:109164. [DOI: 10.1016/j.apradiso.2020.109164] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 03/16/2020] [Accepted: 03/25/2020] [Indexed: 12/15/2022]
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Kessel K, Seifert R, Weckesser M, Roll W, Humberg V, Schlack K, Bögemann M, Bernemann C, Rahbar K. Molecular analysis of circulating tumor cells of metastatic castration-resistant Prostate Cancer Patients receiving 177Lu-PSMA-617 Radioligand Therapy. Theranostics 2020; 10:7645-7655. [PMID: 32685010 PMCID: PMC7359074 DOI: 10.7150/thno.44556] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 05/20/2020] [Indexed: 12/21/2022] Open
Abstract
Rationale: Lu-177-PSMA-617 radioligand therapy (RLT) is currently under approval for treatment of metastatic castration resistant prostate cancer (mCRPC) patients with late stage disease. However, previous studies demonstrated both heterogeneity of prostate specific membrane antigen (PSMA) expression, as well as response to PSMA treatment among mCRPC patients. Thus, there is an unmet need for identifying predictive parametres prior or under PSMA-RLT treatment. We therefore aimed to correlate several clinical and molecular parameters with response to PSMA treatment in a cohort of mCRPC patients undergoing PSMA RLT followed by a detailed analysis of promising candidates. Methods: Nineteen patients, median age 68.8 years (range: 56.9 - 83.3) with mCRPC were included in this study. We performed baseline analysis of clinical parameters based on PSMA PET/CT, (metabolic tumor volume (MTV), total tumor volume (TTV)), serum PSA, ALP, LDH and gene expression analysis of circulating tumor cells (expression of AR full length (AR-FL), AR splice variant 7 (AR-V7), PSA and PSMA) as well as common markers for neuroendocrine differentiation (NED). Results: Patients presented with bone, lymph node, and visceral metastases (89%, 68%, and 21%, respectively). All patients were pretreated with docetaxel, either abiraterone or enzalutamide, or both. Biochemical response in terms of PSA decline ≥50 or ≥30% was observed in 42% and 63%, respectively. There were significant correlations between PSA and PSMA mRNA expression, as well as tumor volumes (both MTV and TTV), AR-FL and AR-V7 mRNA expression. However, there was no correlation with response to PSMA treatment. Furthermore, none of these parameters was significantly correlated with baseline serum PSA values. Common NED markers were shown to be specifically high expressed and revealed impact on OS independent from AR-V7 gene expression. Conclusion: We demonstrate that AR-FL and its splice variant AR-V7 might serve as prognostic biomarkers displaying high tumor burden in mCRPC patient prior to PSMA-RLT. Contrary, PSMA, which has been discussed as a biomarker for PSMA targeted treatment, does not display strong prognostic ability - at least on the mRNA level. Surprisingly, none of these parameters correlates to response to PSMA treatment. In contrast, commom NED markers such as SYP and ENO2 as well as FOXA1 expression level seem to predict OS, but not PFS, more reliably. We admit that a limitation of our study is the focus on mRNA expression of potential biomarkers only. Further investigations analyzing the potential role of protein expression of these markers are therefore warranted.
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Werner RA, Derlin T, Lapa C, Sheikbahaei S, Higuchi T, Giesel FL, Behr S, Drzezga A, Kimura H, Buck AK, Bengel FM, Pomper MG, Gorin MA, Rowe SP. 18F-Labeled, PSMA-Targeted Radiotracers: Leveraging the Advantages of Radiofluorination for Prostate Cancer Molecular Imaging. Theranostics 2020; 10:1-16. [PMID: 31903102 PMCID: PMC6929634 DOI: 10.7150/thno.37894] [Citation(s) in RCA: 104] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 09/11/2019] [Indexed: 12/22/2022] Open
Abstract
Prostate-specific membrane antigen (PSMA)-targeted PET imaging for prostate cancer with 68Ga-labeled compounds has rapidly become adopted as part of routine clinical care in many parts of the world. However, recent years have witnessed the start of a shift from 68Ga- to 18F-labeled PSMA-targeted compounds. The latter imaging agents have several key advantages, which may lay the groundwork for an even more widespread adoption into the clinic. First, facilitated delivery from distant suppliers expands the availability of PET radiopharmaceuticals in smaller hospitals operating a PET center but lacking the patient volume to justify an onsite 68Ge/68Ga generator. Thus, such an approach meets the increasing demand for PSMA-targeted PET imaging in areas with lower population density and may even lead to cost-savings compared to in-house production. Moreover, 18F-labeled radiotracers have a higher positron yield and lower positron energy, which in turn decreases image noise, improves contrast resolution, and maximizes the likelihood of detecting subtle lesions. In addition, the longer half-life of 110 min allows for improved delayed imaging protocols and flexibility in study design, which may further increase diagnostic accuracy. Moreover, such compounds can be distributed to sites which are not allowed to produce radiotracers on-site due to regulatory issues or to centers without access to a cyclotron. In light of these advantageous characteristics, 18F-labeled PSMA-targeted PET radiotracers may play an important role in both optimizing this transformative imaging modality and making it widely available. We have aimed to provide a concise overview of emerging 18F-labeled PSMA-targeted radiotracers undergoing active clinical development. Given the wide array of available radiotracers, comparative studies are needed to firmly establish the role of the available 18F-labeled compounds in the field of molecular PCa imaging, preferably in different clinical scenarios.
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Affiliation(s)
- Rudolf A. Werner
- Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany
- The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Thorsten Derlin
- Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany
| | - Constantin Lapa
- Department of Nuclear Medicine, University Hospital Würzburg, Germany
| | - Sara Sheikbahaei
- The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Takahiro Higuchi
- Department of Nuclear Medicine, University Hospital Würzburg, Germany
- Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Frederik L. Giesel
- Department of Nuclear Medicine, University Hospital Heidelberg, INF 400, 69120 Heidelberg, Germany
| | - Spencer Behr
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA
| | - Alexander Drzezga
- Department of Nuclear Medicine, University Hospital Cologne, Germany
| | - Hiroyuki Kimura
- Department of Analytical and Bioinorganic Chemistry, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Andreas K. Buck
- Department of Nuclear Medicine, University Hospital Würzburg, Germany
| | - Frank M. Bengel
- Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany
| | - Martin G. Pomper
- The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Michael A. Gorin
- The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Steven P. Rowe
- The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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Oh SW, Wurzer A, Teoh EJ, Oh S, Langbein T, Krönke M, Herz M, Kropf S, Wester HJ, Weber WA, Eiber M. Quantitative and Qualitative Analyses of Biodistribution and PET Image Quality of a Novel Radiohybrid PSMA, 18F-rhPSMA-7, in Patients with Prostate Cancer. J Nucl Med 2019; 61:702-709. [PMID: 31836686 DOI: 10.2967/jnumed.119.234609] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 11/11/2019] [Indexed: 11/16/2022] Open
Abstract
Radiohybrid PSMA (rhPSMA) ligands, a new class of theranostic prostate-specific membrane antigen (PSMA)-targeting agents, feature fast 18F synthesis and utility for labeling with radiometals. Here, we assessed the biodistribution and image quality of 18F-rhPSMA-7 to determine the best imaging time point for patients with prostate cancer. Methods: In total, 202 prostate cancer patients who underwent a clinically indicated 18F-rhPSMA-7 PET/CT were retrospectively analyzed, and 12 groups based on the administered activity and uptake time of PET scanning were created: 3 administered activities (low, 222-296 MBq; moderate, 297-370 MBq; and high, 371-444 MBq) and 4 uptake time points (short, 50-70 min; intermediate, 71-90 min; long, 91-110 min; and extra long, ≥111 min). For quantitative analyses, SUVmean and organ- or tumor-to-background ratio were determined for background, healthy organs, and 3 representative tumor lesions. Qualitative analyses assessed overall image quality, nonspecific blood-pool activity, and background uptake in bone or marrow using 3- or 4-point scales. Results: In quantitative analyses, SUVmean showed a significant decrease in the blood pool and lungs and an increase in the kidneys, bladder, and bones as the uptake time increased. SUVmean showed a trend to increase in the blood pool and bones as the administered activity increased. However, no significant differences were found in 377 tumor lesions with respect to the administered activity or uptake time. In qualitative analyses, the overall image quality was stable along with the uptake time, but the proportion rated to have good image quality decreased as the administered activity increased. All other qualitative image parameters showed no significant differences for the administered activities, but they showed significant trends with increasing uptake time: less nonspecific blood activity, more frequent background uptake in the bone marrow, and increased negative impact on clinical decision making. Conclusion: The biodistribution of 18F-rhPSMA-7 was similar to that of established PSMA ligands, and tumor uptake of 18F-rhPSMA-7 was stable across the administered activities and uptake times. An early imaging time point (50-70 min) is recommended for 18F-rhPSMA-7 PET/CT to achieve the highest overall image quality.
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Affiliation(s)
- So Won Oh
- Department of Nuclear Medicine, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.,Department of Nuclear Medicine, Seoul National University Boramae Medical Center, Seoul, Korea
| | | | - Eugene J Teoh
- Department of Radiology and Nuclear Medicine, Oxford University Hospitals NHS Foundation Trust, Oxford, United Kingdom
| | - Sohee Oh
- Department of Biostatistics, Seoul National University Boramae Medical Center, Seoul, Korea; and
| | - Thomas Langbein
- Department of Nuclear Medicine, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Markus Krönke
- Department of Nuclear Medicine, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Michael Herz
- Department of Nuclear Medicine, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | | | | | - Wolfgang A Weber
- Department of Nuclear Medicine, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Matthias Eiber
- Department of Nuclear Medicine, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
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Digital versus analogue PET in [ 68Ga]Ga-PSMA-11 PET/CT for recurrent prostate cancer: a matched-pair comparison. Eur J Nucl Med Mol Imaging 2019; 47:614-623. [PMID: 31792572 DOI: 10.1007/s00259-019-04630-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 11/18/2019] [Indexed: 12/31/2022]
Abstract
PURPOSE Digital PET/CT scanners represent a significant step forward in molecular imaging. We report here the clinical impact of digital PET in PSMA-PET/CT. METHODS In this retrospective study, 88 consecutive patients who underwent [68Ga]Ga-PSMA-11 PET/CT on a digital PET/CT (dPET/CT) scanner for recurrent prostate cancer (PC) were included in a first cohort. In a second step, 88 individuals who underwent an analogue [68Ga]Ga-PSMA-11 PET/CT (aPET/CT) were selected after they were matched to the first cohort for clinical parameters. Following consensus read by two nuclear medicine physicians, the number and type of PC lesions as well as benign, PSMA-positive lesions were recorded. The results were complemented by extensive [68Ga]Ga phantom measurements to determine imaging characteristics of both scanners. RESULTS dPET/CT revealed a greater number of PC lesions compared to aPET/CT (326 versus 142) as well as a proportional increase in benign causes of tracer-uptake (144 versus 65). A greater number of scans were noted as pathological for PC on dPET/CT (74/88) compared to aPET/CT (64/88, p < 0.05). The PSMA positivity rate for PC was significantly higher in dPET/CT for the lowest PSA values (PSA < 2.0 ng/ml, p < 0.05). CONCLUSION dPET/CT detected more PC lesions compared to aPET/CT. A significantly higher rate of pathological PET/CTs was noted in the group with the lowest PSA values. A higher number of benign PSMA-positive lesions were also noted in dPET/CT. The differences could be plausibly explained by the measured imaging characteristics of the scanners.
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Diagnostic performance of 18F-PSMA-1007 PET/CT in biochemically relapsed patients with prostate cancer with PSA levels ≤ 2.0 ng/ml. Prostate Cancer Prostatic Dis 2019; 23:343-348. [DOI: 10.1038/s41391-019-0194-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Revised: 11/13/2019] [Accepted: 11/15/2019] [Indexed: 11/08/2022]
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Dietlein F, Kobe C, Hohberg M, Zlatopolskiy BD, Krapf P, Endepols H, Täger P, Hammes J, Heidenreich A, Persigehl T, Neumaier B, Drzezga A, Dietlein M. Intraindividual Comparison of 18F-PSMA-1007 with Renally Excreted PSMA Ligands for PSMA PET Imaging in Patients with Relapsed Prostate Cancer. J Nucl Med 2019; 61:729-734. [DOI: 10.2967/jnumed.119.234898] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 09/20/2019] [Indexed: 02/04/2023] Open
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47
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Kuten J, Fahoum I, Savin Z, Shamni O, Gitstein G, Hershkovitz D, Mabjeesh NJ, Yossepowitch O, Mishani E, Even-Sapir E. Head-to-Head Comparison of 68Ga-PSMA-11 with 18F-PSMA-1007 PET/CT in Staging Prostate Cancer Using Histopathology and Immunohistochemical Analysis as a Reference Standard. J Nucl Med 2019; 61:527-532. [DOI: 10.2967/jnumed.119.234187] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 08/26/2019] [Indexed: 11/16/2022] Open
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Ahmadzadehfar H, Rahbar K, Essler M, Biersack HJ. PSMA-Based Theranostics: A Step-by-Step Practical Approach to Diagnosis and Therapy for mCRPC Patients. Semin Nucl Med 2019; 50:98-109. [PMID: 31843065 DOI: 10.1053/j.semnuclmed.2019.07.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
To date, several papers have been published about prostate-specific membrane antigen (PSMA)-based radioligand diagnostic and therapeutic approaches. This paper mainly provides information for nuclear medicine physicians that are clinically engaged in the diagnosis and treatment of prostate cancer patients. It aims to present the utility of PSMA imaging and therapy in a step-by-step practical approach; thus, it does not discuss radiochemistry and the molecular basics of PSMA.
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Affiliation(s)
| | - Kambiz Rahbar
- Department of Nuclear Medicine, University Hospital Munster, Bonn, Germany
| | - Markus Essler
- Department of Nuclear Medicine, University Hospital Bonn, Bonn, Germany
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Rauscher I, Krönke M, König M, Gafita A, Maurer T, Horn T, Schiller K, Weber W, Eiber M. Matched-Pair Comparison of 68Ga-PSMA-11 PET/CT and 18F-PSMA-1007 PET/CT: Frequency of Pitfalls and Detection Efficacy in Biochemical Recurrence After Radical Prostatectomy. J Nucl Med 2019; 61:51-57. [PMID: 31253741 DOI: 10.2967/jnumed.119.229187] [Citation(s) in RCA: 137] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 06/12/2019] [Indexed: 11/16/2022] Open
Abstract
18F-labeled prostate-specific membrane antigen (PSMA)-ligand PET has several principal advantages over 68Ga-PSMA-11. The purpose of this retrospective study was to evaluate the frequency of non-tumor-related uptake and the detection efficacy comparing 68Ga-PSMA-11 PET/CT and 18F-PSMA-1007 PET/CT in recurrent prostate cancer (PC) patients. Methods: The study included 102 patients with biochemically recurrent PC after radical prostatectomy undergoing 18F-PSMA-1007 PET/CT imaging. On the basis of various clinical variables, patients with corresponding 68Ga-PSMA-11 PET/CT scans were matched. All PET/CT scans (n = 204) were reviewed by 1 nuclear medicine physician. First, all PET-positive lesions were noted. Then, lesions suspected of being recurrent PC were differentiated from lesions attributed to a benign origin on the basis of known pitfalls and information from CT. For each region, the SUVmax of the lesion with the highest PSMA-ligand uptake was noted. Detection rates were determined, and SUVmax was compared separately for 68Ga-PSMA-11 and 18F-PSMA-1007. Results: In total, 18F-PSMA-1007 PET and 68Ga-PSMA-11 PET revealed 369 and 178 PSMA-ligand-positive lesions, respectively. 18F-PSMA-1007 PET revealed approximately 5 times more lesions attributed to a benign origin than did 68Ga-PSMA-11 PET (245 vs. 52 lesions, respectively). The benign lesions most frequently observed were ganglia, unspecific lymph node, and bone lesions, at a rate of 43%, 31%, and 24% for 18F-PSMA-1007 PET and 29%, 42%, and 27% for 68Ga-PSMA-11 PET, respectively. The SUVmax of lesions attributed to a benign origin was significantly higher (P < 0.0001) for 18F-PSMA-1007 PET. Further, a similar number of lesions was attributed to recurrent PC (124/369 for 18F-PSMA-1007 PET and 126/178 for 68Ga-PSMA-11 PET). Conclusion: The number of lesions with increased PSMA-ligand uptake attributed to a benign origin is considerably higher for 18F-PSMA-1007 PET than for 68Ga-PSMA-11 PET. This finding indicates the need for sophisticated reader training emphasizing known pitfalls and reporting within the clinical context.
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Affiliation(s)
- Isabel Rauscher
- Department of Nuclear Medicine, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Markus Krönke
- Department of Nuclear Medicine, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Michael König
- Department of Nuclear Medicine, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Andrei Gafita
- Department of Nuclear Medicine, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Tobias Maurer
- Department of Urology, Klinikum rechts der Isar, Technical University Munich, Munich, Germany.,Department of Urology and Martini-Klinik, University of Hamburg-Eppendorf, Hamburg, Germany; and
| | - Thomas Horn
- Department of Urology, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Kilian Schiller
- Department of Radiation Oncology, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Wolfgang Weber
- Department of Nuclear Medicine, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Matthias Eiber
- Department of Nuclear Medicine, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
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Shamni O, Nebeling B, Grievink H, Mishani E. Fine-tuning of the automated [18
F]PSMA-1007 radiosynthesis. J Labelled Comp Radiopharm 2019; 62:252-258. [DOI: 10.1002/jlcr.3732] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 03/25/2019] [Accepted: 03/27/2019] [Indexed: 01/25/2023]
Affiliation(s)
- Ofer Shamni
- Cyclotron/Radiochemistry/MicroPET Unit; Hadassah Hebrew University Hospital, Hadassah Medical Organization; Jerusalem Israel
| | | | - Hilbert Grievink
- Cyclotron/Radiochemistry/MicroPET Unit; Hadassah Hebrew University Hospital, Hadassah Medical Organization; Jerusalem Israel
| | - Eyal Mishani
- Cyclotron/Radiochemistry/MicroPET Unit; Hadassah Hebrew University Hospital, Hadassah Medical Organization; Jerusalem Israel
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