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Watanabe Y, Chen YW, Igaki H, Arakawa A, Tao K, Sugiyama M, Nakajima M, Shirakawa N, Yanagisawa S, Miyakita Y, Yoshida A, Isohashi K, Ono K, Narita Y, Ogawa C. Boron neutron capture therapy prolongs survival in a patient with a recurrent malignant peripheral nerve sheath tumor-A case report. Pediatr Blood Cancer 2024:e31011. [PMID: 38616403 DOI: 10.1002/pbc.31011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 02/20/2024] [Accepted: 03/27/2024] [Indexed: 04/16/2024]
Affiliation(s)
- Yuko Watanabe
- Department of Pediatric Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan
| | - Yi-Wei Chen
- Department of Heavy Particles and Radiation Oncology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Hiroshi Igaki
- Department of Radiation Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan
| | - Ayumu Arakawa
- Department of Pediatric Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan
| | - Kayoko Tao
- Department of Pediatric Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan
| | - Masanaka Sugiyama
- Department of Pediatric Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan
| | - Miho Nakajima
- Department of Pediatric Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan
| | - Nami Shirakawa
- Department of Pediatric Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan
| | - Shunsuke Yanagisawa
- Department of Neurosurgery and Neuro-Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan
| | - Yasuji Miyakita
- Department of Neurosurgery and Neuro-Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan
| | - Akihiko Yoshida
- Department of Diagnostic Pathology, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan
| | - Kayako Isohashi
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, Takatsuki-shi, Osaka, Japan
| | - Koji Ono
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, Takatsuki-shi, Osaka, Japan
| | - Yoshitaka Narita
- Department of Neurosurgery and Neuro-Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan
| | - Chitose Ogawa
- Department of Pediatric Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan
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Watabe T, Ose N, Naka S, Fukui E, Kimura T, Kanou T, Funaki S, Sasaki H, Kamiya T, Kurimoto K, Isohashi K, Tatsumi M, Shimosegawa E, Kato H, Ohgaki R, Kanai Y, Shintani Y. Evaluation of LAT1 Expression in Patients With Lung Cancer and Mediastinal Tumors: 18F-FBPA PET Study With Immunohistological Comparison. Clin Nucl Med 2023; 48:853-860. [PMID: 37682600 DOI: 10.1097/rlu.0000000000004816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
PURPOSE OF THE REPORT L-type amino acid transporter-1 (LAT1) is a tumor-specific transporter expressed in various tumor types, with minimal expression in normal organs. We previously demonstrated 18F-fluoro-borono-phenylalanine (18F-FBPA) as a selective PET probe for LAT1 in a preclinical study. Herein, we evaluated LAT1 expression in preoperative patients with lung or mediastinal tumors using 18F-FBPA PET and immunofluorescence staining. PATIENTS AND METHODS The study population included patients with histopathological diagnosis (n = 55): primary lung cancers (n = 21), lung metastases (n = 6), mediastinal tumors (n = 15), and benign lesion (n = 13). PET scanning was performed 1 hour after the injection of 18F-FBPA (232 ± 32 MBq). Immunofluorescence staining was performed on the resected tumor sections using LAT1 antibody. LAT1 staining was graded on a 4-grade scale and compared with the SUVmax on 18F-FBPA PET. RESULTS A positive correlation was observed between the SUVmax of 18F-FBPA PET and LAT1 expression by immunofluorescence staining (r = 0.611, P < 0.001). The SUVmax of 18F-FBPA was 3.92 ± 1.46 in grade 3, 3.21 ± 1.82 in grade 2, 2.33 ± 0.93 in grade 1, and 1.50 ± 0.39 in grade 0 of LAT1 expression. Although 18F-FBPA PET showed variable uptake in lung cancers and mediastinal tumors, benign lesions showed significantly lower SUVmax than those in malignant lesions (P < 0.01). CONCLUSIONS Uptake on 18F-FBPA PET reflected the expression level of LAT1 in lung and mediastinal tumors. It was suggested that 18F-FBPA PET can be used for the precise characterization of the tumor in pretreatment evaluation.
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Affiliation(s)
| | - Naoko Ose
- Department of General Thoracic Surgery, Graduate School of Medicine, Osaka University
| | | | - Eriko Fukui
- Department of General Thoracic Surgery, Graduate School of Medicine, Osaka University
| | - Toru Kimura
- Department of General Thoracic Surgery, Graduate School of Medicine, Osaka University
| | - Takashi Kanou
- Department of General Thoracic Surgery, Graduate School of Medicine, Osaka University
| | - Soichiro Funaki
- Department of General Thoracic Surgery, Graduate School of Medicine, Osaka University
| | | | | | | | | | | | | | | | - Ryuichi Ohgaki
- Bio-system Pharmacology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yoshikatsu Kanai
- Bio-system Pharmacology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yasushi Shintani
- Department of General Thoracic Surgery, Graduate School of Medicine, Osaka University
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Isohashi K, Kanai Y, Aihara T, Hu N, Fukushima K, Baba I, Hirokawa F, Kakino R, Komori T, Nihei K, Hatazawa J, Ono K. Exploration of the threshold SUV for diagnosis of malignancy using 18F-FBPA PET/CT. Eur J Hybrid Imaging 2022; 6:35. [DOI: 10.1186/s41824-022-00156-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 11/09/2022] [Indexed: 12/05/2022] Open
Abstract
Abstract
Background
The goal of the study was to evaluate the diagnostic ability of 18F-FBPA PET/CT for malignant tumors. Findings from 18F-FBPA and 18F-FDG PET/CT were compared with pathological diagnoses in patients with malignant tumors or benign lesions.
Methods
A total of 82 patients (45 males, 37 females; median age, 63 years; age range, 20–89 years) with various types of malignant tumors or benign lesions, such as inflammation and granulomas, were examined by 18F-FDG and 18F-FBPA PET/CT. Tumor uptake of FDG or FBPA was quantified using the maximum standardized uptake value (SUVmax). The final diagnosis was confirmed by cytopathology or histopathological findings of the specimen after biopsy or surgery. A ROC curve was constructed from the SUVmax values of each PET image, and the area under the curve (AUC) and cutoff values were calculated.
Results
The SUVmax for 18F-FDG PET/CT did not differ significantly for malignant tumors and benign lesions (10.9 ± 6.3 vs. 9.1 ± 2.7 P = 0.62), whereas SUVmax for 18F-FBPA PET/CT was significantly higher for malignant tumors (5.1 ± 3.0 vs. 2.9 ± 0.6, P < 0.001). The best SUVmax cutoffs for distinguishing malignant tumors from benign lesions were 11.16 for 18F-FDG PET/CT (sensitivity 0.909, specificity 0.390) and 3.24 for 18F-FBPA PET/CT (sensitivity 0.818, specificity 0.753). ROC analysis showed significantly different AUC values for 18F-FDG and 18F-FBPA PET/CT (0.547 vs. 0.834, p < 0.001).
Conclusion
18F-FBPA PET/CT showed superior diagnostic ability over 18F-FDG PET/CT in differential diagnosis of malignant tumors and benign lesions. The results of this study suggest that 18F-FBPA PET/CT diagnosis may reduce false-positive 18F-FDG PET/CT diagnoses.
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Higashino M, Aihara T, Ozaki A, Hu N, Isohashi K, Ono K, Nihei K, Kurisu Y, Kawata R. Successful salvage surgery of the residual tumor after boron neutron capture therapy (BNCT): A case report. Appl Radiat Isot 2022; 189:110420. [DOI: 10.1016/j.apradiso.2022.110420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 08/08/2022] [Accepted: 08/12/2022] [Indexed: 11/02/2022]
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Kakino R, Hu N, Isohashi K, Aihara T, Nihei K, Ono K. Comprehensive evaluation of dosimetric impact against position errors in accelerator-based BNCT under different treatment parameter settings. Med Phys 2022; 49:4944-4954. [PMID: 35758307 PMCID: PMC9541895 DOI: 10.1002/mp.15823] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 06/07/2022] [Accepted: 06/07/2022] [Indexed: 11/12/2022] Open
Abstract
Background Patients who undergo accelerator‐based (AB) boron neutron capture therapy (BNCT) for head and neck cancer in the sitting position are generally uncomfortably immobilized, and patient motion during this treatment may be greater than that in other radiotherapy techniques. Furthermore, the treatment time of BNCT is relatively long (up to approximately 1 h), which increases the possibility of patient movement during treatment. As most BNCT irradiations are performed in a single fraction, the dosimetric error due to patient motion is of greater consequence and needs to be evaluated and accounted for. Several treatment parameters are required for BNCT dose calculation. Purpose To investigate the dosimetric impacts (DIs) against position errors using a simple cylindrical phantom for an AB‐BNCT system under different treatment parameter settings. Methods The treatment plans were created in RayStation and the dose calculation was performed using the NeuCure® dose engine. A cylindrical phantom (16 cm diameter × 20 cm height) made of soft tissue was modeled. Dummy tumors in the form of a 3‐cm‐diameter sphere were arranged at depths of 2.5 and 6.5 cm (denoted by T2.5 and T6.5, respectively). Reference plans were created by setting the following parameters: collimator size = 10, 12, or 15 cm in diameter, collimator‐to‐surface distance (CSD) = 4.0 or 8.0 cm, tumor‐to‐blood ratio (T/B ratio) using 18F‐fluoro‐borono‐phenylalanine = 2.5 or 5.0, and 10B concentration in blood = 20, 25, or 30 ppm. The prescribed dose was D95% ≥ 20 Gy‐eq for both T2.5 and T6.5. Based on the reference plans, phantom‐shifted plans were created in 26 directions [all combinations of left–right (LR), anterior–posterior (AP), and superior–inferior (SI) directions) and three distances (1.0, 2.0, and 3.0 cm). The DIs were evaluated at D80% of the tumors. The shift direction dependency of the DI in the LR, AP, and SI directions was evaluated by conducting a multiple regression analysis (MRA) and other analyses where required. Results The coefficients of the MRA of the DIs for LR, AP, and SI shifts were −0.08, 2.16, and −0.04 (p‐values = 0.084, <0.01, and 0.334) for T2.5 and −0.05, 2.08, and 0.15 (p‐values = 0.526, <0.01, and 0.065) for T6.5, respectively. The analysis of variance showed that DIs due to the AP shift were significantly greater for smaller collimator sizes on T2.5 and smaller CSD on T6.5. Dose reduction due to SI or LR (lateral) shifts was significantly greater for smaller collimator sizes on both T2.5 and T6.5 and smaller CSD on T2.5, according to the Student's t‐test. There were no significant differences in the DIs against both the AP shift and the lateral shift between the different T/B ratios and 10B concentrations. Conclusion The DIs were largely affected by the shift in the AP direction and were influenced by the different treatment parameters.
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Affiliation(s)
- Ryo Kakino
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, 2-7 Daigaku-machi, Takatsuki-shi, Osaka, 569-8686, Japan
| | - Naonori Hu
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, 2-7 Daigaku-machi, Takatsuki-shi, Osaka, 569-8686, Japan.,Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2 Asashiro-nishi Kumatori-cho, Osaka, 590-0494, Japan
| | - Kayako Isohashi
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, 2-7 Daigaku-machi, Takatsuki-shi, Osaka, 569-8686, Japan
| | - Teruhito Aihara
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, 2-7 Daigaku-machi, Takatsuki-shi, Osaka, 569-8686, Japan
| | - Keiji Nihei
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, 2-7 Daigaku-machi, Takatsuki-shi, Osaka, 569-8686, Japan.,Department of Radiation Oncology, Osaka Medical and Pharmaceutical University, 2-7 Daigaku-machi, Takatsuki-shi, Osaka, 569-8686, Japan
| | - Koji Ono
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, 2-7 Daigaku-machi, Takatsuki-shi, Osaka, 569-8686, Japan
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Hu N, Tanaka H, Kakino R, Yoshikawa S, Miyao M, Akita K, Isohashi K, Aihara T, Nihei K, Ono K. Evaluation of a treatment planning system developed for clinical boron neutron capture therapy and validation against an independent Monte Carlo dose calculation system. Radiat Oncol 2021; 16:243. [PMID: 34952608 PMCID: PMC8709965 DOI: 10.1186/s13014-021-01968-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 12/15/2021] [Indexed: 11/16/2022] Open
Abstract
Boron neutron capture therapy (BNCT) for the treatment of unresectable, locally advanced, and recurrent carcinoma of the head and neck cancer has been approved by the Japanese government for reimbursement under the national health insurance as of June 2020. A new treatment planning system for clinical BNCT has been developed by Sumitomo Heavy Industries, Ltd. (Sumitomo), NeuCure® Dose Engine. To safely implement this system for clinical use, the simulated neutron flux and gamma ray dose rate inside a water phantom was compared against experimental measurements. Furthermore, to validate and verify the new planning system, the dose distribution inside an anthropomorphic head phantom was compared against a BNCT treatment planning system SERA and an in-house developed Monte Carlo dose calculation program. The simulated results closely matched the experimental results, within 5% for the thermal neutron flux and 10% for the gamma ray dose rate. The dose distribution inside the head phantom closely matched with SERA and the in-house developed dose calculation program, within 3% for the tumour and a difference of 0.3 Gyw for the brain.
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Affiliation(s)
- Naonori Hu
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, Osaka-fu Takatsuki-shi Daigakumachi 2-7, Takatsuki, Japan. .,Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kyoto, Japan.
| | - Hiroki Tanaka
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kyoto, Japan
| | - Ryo Kakino
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, Osaka-fu Takatsuki-shi Daigakumachi 2-7, Takatsuki, Japan
| | - Syuushi Yoshikawa
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, Osaka-fu Takatsuki-shi Daigakumachi 2-7, Takatsuki, Japan
| | - Mamoru Miyao
- Central Department of Radiology, Osaka Medical and Pharmaceutical University Hospital, Takatsuki, Japan
| | - Kazuhiko Akita
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, Osaka-fu Takatsuki-shi Daigakumachi 2-7, Takatsuki, Japan
| | - Kayako Isohashi
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, Osaka-fu Takatsuki-shi Daigakumachi 2-7, Takatsuki, Japan
| | - Teruhito Aihara
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, Osaka-fu Takatsuki-shi Daigakumachi 2-7, Takatsuki, Japan
| | - Keiji Nihei
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, Osaka-fu Takatsuki-shi Daigakumachi 2-7, Takatsuki, Japan.,Department of Radiation Oncology, Osaka Medical and Pharmaceutical University Hospital, Takatsuki, Japan
| | - Koji Ono
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, Osaka-fu Takatsuki-shi Daigakumachi 2-7, Takatsuki, Japan
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Watanabe Y, Igaki H, Arakawa A, Yanagisawa S, Takahashi M, Ohno M, Miyakita Y, Satomi K, Yoshida A, Isohashi K, Ono K, Miyatake SI, Chen YW, Ogawa C, Narita Y. RT-5 Boron Neutron Capture Therapy has extended progression-free survival about recurrent malignant peripheral nerve sheath tumor - A case report. Neurooncol Adv 2021. [PMCID: PMC8664619 DOI: 10.1093/noajnl/vdab159.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Introduction: Recurrent malignant peripheral nerve sheath tumor (MPNST) is intractable. Boron neutron capture therapy (BNCT) is a treatment using tumor-selective particle radiation, and is indicated for medical treatment for head and neck cancer, and also used for malignant glioma and malignant meningioma.<Case>20-year-old woman who has MPNST that extends from the subcutaneous tissue of the right neck to the posterior fossa. <Medical History>Chemotherapy and local irradiation(50.4Gy/28fr) for primary embryonal rhabdomyosarcoma of the right ear canal at the age six.<Current medical history>Right cervical tumor developed at 17-year-old, some chemotherapy regimens and tumor resections were performed as recurrence of rhabdomyosarcoma at the previous hospital. After she was diagnosed with MPNST in the pathology consultation at our hospital, she was irradiated with heavy ion beam 70.8Gy(RBE)/16fr and received additional chemotherapies at our department, but her tumor was refractory. Although BNCT for MPNST is not covered by health insurance in Japan, she wanted to try to be treated for BNCT. After confirming boron accumulation in the tumor (SUVmax 4.28) by FBPA-PET, tumor growth and hydrocephalus occurred while waiting for travel to Taiwan due to the spread of COVID-19 infection. She was performed tumor resection(NTR) and irradiated with SRS 20Gy/fr for the residual lesion, but tumor had a rapid recurrence from the margin of the excision cavity. Finally, she could travel about 3 months after the operation and underwent BNCT, that used neutrons and 10B-boronophenylalanine from the Tsinghua University research reactor in Taiwan. No serious adverse events including cerebral edema were observed, and dramatic tumor shrinkage was maintained after treatment. FBPA-PET of 3 months later showed accumulation in the part of the margin of the cavity, the recurrence was observed on MRI after 3 and a half months. Discussion: BNCT for refractory/recurrent MPNST showed acceptable safety and was able to prolong progression-free survival.
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Affiliation(s)
- Yuko Watanabe
- Department of Pediatric Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - Hiroshi Igaki
- Department of Radiation Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - Ayumu Arakawa
- Department of Pediatric Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - Shunsuke Yanagisawa
- Department of Neurosurgery and Neuro-Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - Masamichi Takahashi
- Department of Neurosurgery and Neuro-Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - Makoto Ohno
- Department of Neurosurgery and Neuro-Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - Yasuji Miyakita
- Department of Neurosurgery and Neuro-Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - Kaishi Satomi
- Department of Diagnostic Pathology, National Cancer Center Hospital, Tokyo, Japan
| | - Akihiko Yoshida
- Department of Diagnostic Pathology, National Cancer Center Hospital, Tokyo, Japan
| | - Kayako Isohashi
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, Osaka, Japan
| | - Koji Ono
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, Osaka, Japan
| | - Shin-Ichi Miyatake
- Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, Osaka, Japan
| | - Yi-Wei Chen
- Department of Oncology, Taipei Veterans General Hospital, Taipei City, Taiwan
| | - Chitose Ogawa
- Department of Pediatric Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - Yoshitaka Narita
- Department of Neurosurgery and Neuro-Oncology, National Cancer Center Hospital, Tokyo, Japan
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Nakata J, Isohashi K, Oka Y, Nakajima H, Morimoto S, Fujiki F, Oji Y, Tsuboi A, Kumanogoh A, Hashimoto N, Hatazawa J, Sugiyama H. Imaging Assessment of Tumor Response in the Era of Immunotherapy. Diagnostics (Basel) 2021; 11:diagnostics11061041. [PMID: 34198874 PMCID: PMC8226723 DOI: 10.3390/diagnostics11061041] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 05/29/2021] [Accepted: 06/03/2021] [Indexed: 02/07/2023] Open
Abstract
Assessment of tumor response during treatment is one of the most important purposes of imaging. Before the appearance of immunotherapy, response evaluation criteria in solid tumors (RECIST) and positron emission tomography response criteria in solid tumors (PERCIST) were, respectively, the established morphologic and metabolic response criteria, and cessation of treatment was recommended when progressive disease was detected according to these criteria. However, various types of immunotherapy have been developed over the past 20 years, which show novel false positive findings on images, as well as distinct response patterns from conventional therapies. Antitumor immune response itself causes 18F-fluorodeoxyglucose (FDG) uptake in tumor sites, known as "flare phenomenon", so that positron emission tomography using FDG can no longer accurately identify remaining tumors. Furthermore, tumors often initially increase, followed by stability or decrease resulting from immunotherapy, which is called "pseudoprogression", so that progressive disease cannot be confirmed by computed tomography or magnetic resonance imaging at a single time point. As a result, neither RECIST nor PERCIST can accurately predict the response to immunotherapy, and therefore several new response criteria fixed for immunotherapy have been proposed. However, these criteria are still controversial, and also require months for response confirmation. The establishment of optimal response criteria and the development of new imaging technologies other than FDG are therefore urgently needed. In this review, we summarize the false positive images and the revision of response criteria for each immunotherapy, in order to avoid discontinuation of a truly effective immunotherapy.
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Affiliation(s)
- Jun Nakata
- Department of Clinical Laboratory and Biomedical Sciences, Osaka University Graduate School of Medicine, Suita City 565-0871, Osaka, Japan;
- Correspondence: ; Tel.: +81-6-6879-3676; Fax: +81-6-6879-3677
| | - Kayako Isohashi
- Department of Kansai BNCT Medical Center, Osaka Medical and Pharmaceutical University, Takatsuki City 596-8686, Osaka, Japan;
| | - Yoshihiro Oka
- Department of Cancer Stem Cell Biology, Osaka University Graduate School of Medicine, Suita City 565-0871, Osaka, Japan;
- Department of Immunopathology, WP1 Immunology Frontier Research Center, Osaka University, Suita City 565-0871, Osaka, Japan;
| | - Hiroko Nakajima
- Department of Cancer Immunology, Osaka University Graduate School of Medicine, Suita City 565-0871, Osaka, Japan; (H.N.); (F.F.); (H.S.)
| | - Soyoko Morimoto
- Department of Cancer Immunotherapy, Osaka University Graduate School of Medicine, Suita City 565-0871, Osaka, Japan; (S.M.); (A.T.)
| | - Fumihiro Fujiki
- Department of Cancer Immunology, Osaka University Graduate School of Medicine, Suita City 565-0871, Osaka, Japan; (H.N.); (F.F.); (H.S.)
| | - Yusuke Oji
- Department of Clinical Laboratory and Biomedical Sciences, Osaka University Graduate School of Medicine, Suita City 565-0871, Osaka, Japan;
| | - Akihiro Tsuboi
- Department of Cancer Immunotherapy, Osaka University Graduate School of Medicine, Suita City 565-0871, Osaka, Japan; (S.M.); (A.T.)
| | - Atsushi Kumanogoh
- Department of Immunopathology, WP1 Immunology Frontier Research Center, Osaka University, Suita City 565-0871, Osaka, Japan;
- Department of Respiratory Medicine and Clinical Immunology, Osaka University Graduate School of Medicine, Suita City 565-0871, Osaka, Japan
- Integrated Frontier Research for Medical Science Division, Institute for Open and Transdisciplinary Research Initiatives (OTRI), Osaka University Graduate School of Medicine, Suita City 565-0871, Osaka, Japan
| | - Naoya Hashimoto
- Department of Neurosurgery, Kyoto Prefectural University of Medicine Graduate School of Medical Science, Kyoto City 602-8566, Kyoto, Japan;
| | - Jun Hatazawa
- Department of Research Center for Nuclear Physics, Osaka University Graduate School of Medicine, Suita City 565-0871, Osaka, Japan;
| | - Haruo Sugiyama
- Department of Cancer Immunology, Osaka University Graduate School of Medicine, Suita City 565-0871, Osaka, Japan; (H.N.); (F.F.); (H.S.)
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Kato H, Okuno T, Isohashi K, Koda T, Shimizu M, Mochizuki H, Nakatsuji Y, Hatazawa J. Astrocyte metabolism in multiple sclerosis investigated by 1-C-11 acetate PET. J Cereb Blood Flow Metab 2021; 41:369-379. [PMID: 32169013 PMCID: PMC7812519 DOI: 10.1177/0271678x20911469] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This study was aimed at evaluating the metabolism of reactive astrocytes in the brains of patients with multiple sclerosis by quantitative 1-C-11 acetate positron emission tomography (PET). Magnetic resonance imaging and 1-C-11 quantitative PET were performed in eight patients with multiple sclerosis and 10 normal control subjects. The efflux rate (k2) of 1-C-11 acetate, which reportedly reflects the metabolic rate of 1-C-11 acetate, was calculated based on the one-tissue compartmental model. Fractional anisotropy was also determined to evaluate the integrity of the neuronal tracts. The values of k2 in the patients with multiple sclerosis were significantly higher than those in the normal control subjects, in both the white matter (p = 0.003) and the gray matter (p = 0.02). In addition, the white matter/gray matter ratio of k2 was significantly higher in the multiple sclerosis patients than in the normal control subjects (p = 0.02). Voxel-based statistical analysis revealed most prominent increase in k2 in the neuronal fiber tracts, as well as decrease in fractional anisotropy in them in the multiple sclerosis patients. The present study clarified that the pathological changes associated with astrocytic reactivation in multiple sclerosis patients could be visualized by quantitative 1-C-11 acetate PET.
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Affiliation(s)
- Hiroki Kato
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Tatsusada Okuno
- Department of Neurology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Kayako Isohashi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Toru Koda
- Department of Medical Innovation, Osaka University Hospital Department of Neurology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Mikito Shimizu
- Department of Neurology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hideki Mochizuki
- Department of Neurology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yuji Nakatsuji
- Department of Neurology, Toyama University Hospital, Toyama, Japan
| | - Jun Hatazawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan
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Maruyama K, Okada T, Ueha T, Isohashi K, Ikeda H, Kanai Y, Sasaki K, Gentsu T, Ueshima E, Sofue K, Nogami M, Yamaguchi M, Sugimoto K, Sakai Y, Hatazawa J, Murakami T. In vivo evaluation of percutaneous carbon dioxide treatment for improving intratumoral hypoxia using 18F-fluoromisonidazole PET-CT. Oncol Lett 2021; 21:207. [PMID: 33574946 PMCID: PMC7816357 DOI: 10.3892/ol.2021.12468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 12/22/2020] [Indexed: 11/23/2022] Open
Abstract
Carbon dioxide (CO2) treatment is reported to have an antitumor effect owing to the improvement in intratumoral hypoxia. Previous studies were based on histological analysis alone. In the present study, the improvement in intratumoral hypoxia by percutaneous CO2 treatment in vivo was determined using 18F-fluoromisonidazole positron emission tomography-computed tomography (18F-FMISO PET-CT) images. Twelve Japanese nude mice underwent implantation of LM8 tumor cells in the dorsal subcutaneous area 2 weeks before percutaneous CO2 treatment and 18F-FMISO PET-CT scans. Immediately after intravenous injection of 18F-FMISO, CO2 and room air were administered transcutaneously in the CO2-treated group (n=6) and a control group (n=6), respectively; each treatment was performed for 10 minutes. PET-CT was performed 2 h after administration of 18F-FMISO. 18F-FMISO tumor uptake was quantitatively evaluated using the maximum standardized uptake value (SUVmax), tumor-to-liver ratio (TLR), tumor-to-muscle ratio (TMR), metabolic tumor volume (MTV) and total lesion glycolysis (TLG). Mean ± standard error of the mean (SEM) of the tumor volume was not significantly different between the two groups (CO2-treated group, 1.178±0.450 cm3; control group, 1.368±0.295 cm3; P=0.485). Mean ± SEM of SUVmax, TLR, MTV (cm3) and TLG were significantly lower in the CO2-treated group compared with the control group (0.880±0.095 vs. 1.253±0.071, P=0.015; 1.063±0.147361 vs. 1.455±0.078, P=0.041; 0.353±0.139 vs. 1.569±0.438, P=0.015; 0.182±0.070 vs. 1.028±0.338, P=0.015), respectively. TMR was not significantly different between the two groups (4.520±0.503 vs. 5.504±0.310; P=0.240). In conclusion, 18F-FMISO PET revealed that percutaneous CO2 treatment improved intratumoral hypoxia in vivo. This technique enables assessment of the therapeutic effect in CO2 treatment by imaging, and may contribute to its clinical application.
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Affiliation(s)
- Koji Maruyama
- Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo 650-0017, Japan
| | - Takuya Okada
- Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo 650-0017, Japan
| | - Takeshi Ueha
- Division of Rehabilitation Medicine, Kobe University Graduate School of Medicine, Kobe, Hyogo 650-0017, Japan
| | - Kayako Isohashi
- Department of Tracer Kinetics and Nuclear Medicine, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
| | - Hayato Ikeda
- Department of Tracer Kinetics and Nuclear Medicine, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
| | - Yasukazu Kanai
- Department of Tracer Kinetics and Nuclear Medicine, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
| | - Koji Sasaki
- Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo 650-0017, Japan
| | - Tomoyuki Gentsu
- Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo 650-0017, Japan
| | - Eisuke Ueshima
- Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo 650-0017, Japan
| | - Keitaro Sofue
- Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo 650-0017, Japan
| | - Munenobu Nogami
- Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo 650-0017, Japan
| | - Masato Yamaguchi
- Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo 650-0017, Japan
| | - Koji Sugimoto
- Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo 650-0017, Japan
| | - Yoshitada Sakai
- Division of Rehabilitation Medicine, Kobe University Graduate School of Medicine, Kobe, Hyogo 650-0017, Japan
| | - Jun Hatazawa
- Department of Tracer Kinetics and Nuclear Medicine, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
| | - Takamichi Murakami
- Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo 650-0017, Japan
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11
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Takai S, Matsushita Y, Kawabata S, Ono K, Isohashi K, Wanibuchi M, Miyatake S. NI-04 Evaluation of post boron neutron capture therapy for recurrent meningioma using fluoride-labeled boronophenylalanine PET. Neurooncol Adv 2020. [PMCID: PMC7699087 DOI: 10.1093/noajnl/vdaa143.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
We have applied boron neutron capture therapy (BNCT) for 46 recurrent high grade meningiomas (HGM). Twelve cases among them, fluoride-labeled boronophenylalanine positron emission tomography (18F-BPA-PET) were utilized before and after BNCT to evaluate the tumor activity. The lesion to normal brain (L/N) ratios of 14 lesions of these 11 cases were investigated. In all cases L/N ratio decreased after BNCT. The L/N ratio of recurrent (HGM) was 3.2±1.5 (mean±SD) before BNCT and 2.1±0.6 after that. In contrast enhanced MRI, 13 out of 14 lesions shrank or unchanged at least 3 months after BNCT, while one lesion transiently increased and then decreased within 3 months, showing pseudoprogression. In addition, 6 of 12 lesions which could be followed on MRI for more than 3 months progressed after 8 months. 4 of them were performed PET at the time of progressing. The L/N ratio of 2 progressing lesion which were diagnosed as recurrence due to continuously increasing were showed increasing. The L/N ratio of the other 2 lesions which were diagnosed radiation necrosis due to unchanged or shrinkage showed decreasing. Moreover, some systemic metastasis detected in PET image. F-BPA-PET seems to be useful for the evaluation of tumor activity.
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Affiliation(s)
- Satoshi Takai
- Osaka medical college hospital, Osaka prefecture, Japan
| | | | | | - Koji Ono
- Osaka medical college hospital, Osaka prefecture, Japan
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12
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Nakata J, Isohashi K, Morimoto S, Itou R, Kamiya T, Matsuura A, Nakajima H, Fujiki F, Nishida S, Hasii Y, Hasegawa K, Nakatsuka S, Hosen N, Tsuboi A, Oka Y, Kumanogoh A, Shibano M, Munakata S, Oji Y, Hatazawa J, Sugiyama H. Enhanced immune reaction resulting from co-vaccination of WT1 helper peptide assessed on PET-CT. Medicine (Baltimore) 2020; 99:e22417. [PMID: 32991475 PMCID: PMC7523872 DOI: 10.1097/md.0000000000022417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
It has become evident that positron emission tomography/computed tomography (PET-CT) using 2-deoxy-2-[F-18]fluoro-D-glucose (FDG) (FDG PET-CT) can detect anti-tumor immune response induced by various immunotherapies. To evaluate whether FDG PET-CT could detect anti-cancer immune response caused by cancer vaccine therapy, we performed a retrospective analysis of FDG PET-CT imaging of patients who were treated with Wilms Tumor 1 (WT1) vaccine therapy in Osaka University during July 2008 and June 2018. Increased FDG uptakes were detected in WT1-vaccinated skin and their draining lymph nodes during the repeated vaccination. While the FDG uptakes seemed to decrease with time after the cessation of WT1 peptide vaccinations, persistence of FDG uptakes for years in WT1-vaccinated skin were also observed in 2 cases who showed good clinical course. Moreover, the FDG uptakes of patients treated with the combination vaccine of WT1 specific cytotoxic T cell (CTL) and helper peptides were significantly stronger than of those treated with the WT1 CTL peptide alone. Since it is evident that the combination vaccine can induce a more robust anti-tumor immunity than can CTL peptide vaccine alone, the FDG uptakes in WT1-vaccinated skin might reflect the degree of immune response. These results suggest that PET-CT might be a good tool for prediction of anti-tumor immune response induced by WT1 vaccine therapy. Larger scale prospective studies therefore seem to be warranted.
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Affiliation(s)
- Jun Nakata
- Department of Clinical Laboratory and Biomedical Sciences
| | | | - Soyoko Morimoto
- Department of Cancer Immunotherapy, Osaka University Graduate School of Medicine
| | - Ryota Itou
- Department of Pathology, Sakai City General Hospital
| | - Takashi Kamiya
- Department of Nuclear Medicine and Tracer Kinetics, Osaka
| | - Ai Matsuura
- Department of Hematology, Sakai City General Hospital
| | - Hiroko Nakajima
- Department of Cancer Immunology, Osaka University Graduate School of Medicine
| | - Fumihiro Fujiki
- Department of Cancer Immunotherapy, Osaka University Graduate School of Medicine
| | - Sumiyuki Nishida
- Department of Respiratory Medicine and clinical immunology, Osaka University Graduate School of Medicine
| | - Yoshiko Hasii
- Department of Cancer Immunotherapy, Osaka University Graduate School of Medicine
| | | | | | - Naoki Hosen
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine
| | - Akihiro Tsuboi
- Department of Cancer Immunotherapy, Osaka University Graduate School of Medicine
| | - Yoshihiro Oka
- Department of Cancer Stem Cell Biology
- Department of Immunopathology, WP1 Immunology Frontier Research Center, Osaka University, Suita city, Osaka, Japan
| | - Atsushi Kumanogoh
- Department of Respiratory Medicine and clinical immunology, Osaka University Graduate School of Medicine
- Department of Immunopathology, WP1 Immunology Frontier Research Center, Osaka University, Suita city, Osaka, Japan
| | | | | | - Yusuke Oji
- Department of Clinical Laboratory and Biomedical Sciences
| | - Jun Hatazawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka
| | - Haruo Sugiyama
- Department of Cancer Immunology, Osaka University Graduate School of Medicine
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13
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Kawabata S, Takeuchi K, Hiramatsu R, Matsushita Y, Furuse M, Wanibuchi M, Isohashi K, Aihara T, Ono K, Miyatake SI. RT-06 PLANNING OF BORON NEUTRON CAPTURE THERAPY (BNCT) USING POSITRON EMISSION TOMOGRAPHY (PET). Neurooncol Adv 2019. [PMCID: PMC7213358 DOI: 10.1093/noajnl/vdz039.097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Boron neutron capture therapy (BNCT) is the particle irradiation therapy that the selective radiation for tumor cells is available for theoretically. The role that the amino acid (phenylalanine) PET (18F-BPA-PET) that we used boronophenylalanine (BPA) which is a boron compound for neutron capture reaction as a tracer carries out is major in our BNCT especially for the recent non-craniotomy BNCT, and it covers by treatment, observation from indication. In this report, we introduce this PET as a principal axis about BNCT and a relation of the PET.In our BNCT, we calculated the drug accumulation to the tumor from BPA-PET before neutron irradiation and reflected it for individual treatment. We become able to decide indication of BNCT by using this PET study, and the indication expansion to other systemic cancers including head and neck cancer and lung, liver is now worked on actively. Also, in other irradiation modalities, they make a radiation plan based on PET study, and several reports to try the improvement of results had been present, however, high radiation doses will be “ exposed “ to the lesion showing high accumulation in BPA-PET in BNCT. We determine the neutron exposure time from the dosage for the normal tissue in the actual treatment, but the Lesion / Normal tissue ratio obtained from BPA-PET is reflected by the evaluation of the tumor dose and the following treatment plan. Also, after the treatment, diagnoses of the pathologic condition such as an increase in tumor volume, a recurrence or the radiation necrosis might be difficult, and we found that the PET study was useful in the follow-up stage for the patients with already treated malignant brain tumor.
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Affiliation(s)
- Shinji Kawabata
- Department of Neurosurgery, Osaka Medical College, Osaka, Japan
| | - Koji Takeuchi
- Department of Neurosurgery, Osaka Medical College, Osaka, Japan
| | - Ryo Hiramatsu
- Department of Neurosurgery, Osaka Medical College, Osaka, Japan
| | - Yoko Matsushita
- Department of Neurosurgery, Osaka Medical College, Osaka, Japan
| | - Motomasa Furuse
- Department of Neurosurgery, Osaka Medical College, Osaka, Japan
| | | | - Kayako Isohashi
- Department of Neurosurgery, Osaka Medical College, Osaka, Japan
| | - Teruhito Aihara
- Department of Neurosurgery, Osaka Medical College, Osaka, Japan
| | - Koji Ono
- Department of Neurosurgery, Osaka Medical College, Osaka, Japan
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14
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Tatsumi M, Isohashi K, Matsunaga K, Watabe T, Kato H, Kanakura Y, Hatazawa J. Volumetric and texture analysis on FDG PET in evaluating and predicting treatment response and recurrence after chemotherapy in follicular lymphoma. Int J Clin Oncol 2019; 24:1292-1300. [DOI: 10.1007/s10147-019-01482-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Accepted: 05/31/2019] [Indexed: 01/09/2023]
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15
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Yajima S, Miyagawa S, Fukushima S, Isohashi K, Watabe T, Ikeda H, Horitsugi G, Harada A, Sakaniwa R, Hatazawa J, Sawa Y. Microvascular Dysfunction Related to Progressive Left Ventricular Remodeling due to Chronic Occlusion of the Left Anterior Descending Artery in an Adult Porcine Heart. Int Heart J 2019; 60:715-727. [PMID: 31105143 DOI: 10.1536/ihj.18-346] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Occlusion of a major coronary artery induces myocardial infarction (MI), leading to left ventricle (LV) remodeling due to progressive microvasculature dysfunction. Irreversible impairment in microvascular function has been suggested to extend from the infarcted region into the infarct-border or remote regions, depending on the time to revascularization. Our aim was to determine whether the occlusion of a major coronary artery induces microvascular dysfunction in the adjacent area perfused by intact coronary arteries using a porcine model for chronic total occlusion of the left anterior descending artery (LAD). MI was induced via an ameroid constrictor ring around the LAD in adult Göttingen pigs (Sus scrofa domesticus, n = 5). Age-matched normal pigs were treated as controls (n = 3). Cardiac magnetic resonance showed reduced systolic regional wall motion in the left circumflex (LCx) and right coronary artery (RCA) territories, with a progressively worsening motion in the infarction-adjacent area over an eight-week period. On 13N-ammonia positron emission tomography (PET), myocardial blood flow (MBF) during hyperemia was significantly greater in the LCx and RCA territories (particularly in the infarction-adjacent area) compared to that in the LAD territory at four weeks after infarct induction. Subsequently, the flow significantly decreased, approaching that in the LAD territory at eight weeks after infarct induction. Fluoroscopy-guided pressure-wire studies showed significantly higher microvascular resistance in the LCx area at eight weeks compared to that in controls. Electron microscopy showed endothelium swelling and microvasculature disruption in areas adjacent to the LCx and RCA territories. Anterior MI caused coronary microvascular dysfunction in the adjacent area, associated with a reduced MBF and regional wall motion.
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Affiliation(s)
- Shin Yajima
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine
| | - Shigeru Miyagawa
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine
| | - Satsuki Fukushima
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine
| | - Kayako Isohashi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine
| | - Tadashi Watabe
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine
| | - Hayato Ikeda
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine
| | - Genki Horitsugi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine
| | - Akima Harada
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine
| | - Ryoto Sakaniwa
- Public Health, Osaka University Graduate School of Medicine
| | - Jun Hatazawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine
| | - Yoshiki Sawa
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine
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16
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Yajima S, Miyagawa S, Fukushima S, Sakai Y, Iseoka H, Harada A, Isohashi K, Horitsugi G, Mori Y, Shiozaki M, Ohkawara H, Sakaniwa R, Hatazawa J, Yoshioka Y, Sawa Y. Prostacyclin Analogue-Loaded Nanoparticles Attenuate Myocardial Ischemia/Reperfusion Injury in Rats. JACC Basic Transl Sci 2019; 4:318-331. [PMID: 31312756 PMCID: PMC6609885 DOI: 10.1016/j.jacbts.2018.12.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 12/27/2018] [Accepted: 12/27/2018] [Indexed: 11/21/2022]
Abstract
Intravenously injected ONO-1301–containing nanoparticles selectively accumulated in the ischemic border area of the myocardium. Prominent up-regulation occurred of proangiogenic cytokines such as vascular endothelial growth factor and angiopoietin-1 in the ischemic myocardium, which may have contributed to the preservation of the native vascular and capillary networks, thus preserving regional myocardial blood flow. Down-regulation of the proinflammatory cytokines interleukin-1β, interleukin-6, and tumor necrosis factor-α in the ischemic myocardium might have led to the attenuation of myocyte swelling and the suppression of the endothelial bleb formation, also contributing to the preservation of myocardial blood flow or the reduced infarct size.
Intravenously injected ONO-1301–containing nanoparticles (ONO-1301NPs), unlike an ONO-1301 solution, selectively accumulated in the ischemia/reperfusion (I/R)-injured myocardium of rats and contributed to the prolonged retention of ONO-1301 in the targeted myocardial tissue. In the ischemic area, proangiogenic cytokines were up-regulated and inflammatory cytokines were down-regulated upon ONO-1301NP administration. Consequently, ONO-1301NP–injected rats exhibited a smaller infarct size, better-preserved capillary networks, and a better-preserved myocardial blood flow at 24 h after I/R injury, compared with those in vehicle-injected or ONO-1301 solution–injected rats. ONO-1301NPs attenuate the myocardial I/R injury via proangiogenic and anti-inflammatory effects of the drug.
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Key Words
- ANG, angiopoietin
- EPR, enhanced permeability and retention
- I/R, ischemia/reperfusion
- IL, interleukin
- MBF, myocardial blood flow
- MRI, magnetic resonance imaging
- NP, nanoparticle
- ONO-1301
- PET, positron emission tomography
- PMNL, polymorphonuclear leukocyte
- VEGF, vascular endothelial growth factor
- ischemia/reperfusion injury
- nanoparticles
- prostacyclin
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Affiliation(s)
- Shin Yajima
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Shigeru Miyagawa
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Satsuki Fukushima
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yoshiki Sakai
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hiroko Iseoka
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Akima Harada
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Kayako Isohashi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Genki Horitsugi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yuki Mori
- Department of Biofunctional Imaging Laboratory, Immunology Frontier Research Center, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Motoko Shiozaki
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hirotatsu Ohkawara
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Ryoto Sakaniwa
- Department of Public Health, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Jun Hatazawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yoshichika Yoshioka
- Department of Biofunctional Imaging Laboratory, Immunology Frontier Research Center, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yoshiki Sawa
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
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17
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Kamiya T, Watabe T, Fujino K, Victor R, Kawamura Y, Isohashi K, Matsunaga K, Tatsumi M, Kato H, Shimosegawa E, Hatazawa J. Simplified Dynamic Phantom for Pediatric Renography: A Description of Instrument and its Performance. Asia Ocean J Nucl Med Biol 2019; 7:38-48. [PMID: 30705910 PMCID: PMC6352048 DOI: 10.22038/aojnmb.2018.11803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Objective(s): Renography is used for the diagnostic evaluation of pediatric patients with a suspected obstruction of urinary tract or impaired renal function. The recommended dose for children have been released by the European Association of Nuclear Medicine, Society of Nuclear Medicine and Molecular Imaging, and Japanese Society of Nuclear Medicine. Since acquisition counts in dynamic scintigraphy are affected by the administered doses and sensitivity of the scintillation camera, the scan procedure should be determined independently. In this study, we constructed simplified dynamic phantom imitating pediatric renography and tested its performance. Methods: Simplified dynamic phantom consisted of three components (i.e., infusion, imitated kidney, and drainage sections). The infusion rates (mL/min) were determined by comparing the time activity curves obtained from patients with normal renal function. The time-points of the maximum counts (Tmax), as well as the two-thirds and one-half of the maximum counts (T2/3 and T1/2) were measured in different doses using the phantom with the best-match infusion rate and duration, and low-energy general-purpose (LEGP) or low-energy high-resolution (LEHR) collimators and applying different attenuations. Results: The best-match infusion rates of the phantom to imitate the time activity curve of the normal renal function were 42.0, 1.0, 0.6, and 0.3 mL/min in the arterial, secretory, early-excretory, and late-excretory phases, respectively. When 30 MBq, LEHR collimator and non-water-equivalent phantom were applied, Tmax, T2/3, and T1/2 were 242±15.3, 220±10.0 and 317±25.2 seconds, respectively. Using LEGP collimator and (3 MBq of activity) 5-cm water-equivalent phantom, Tmax, T2/3, and T1/2 values were estimated as 242±5.8, 213±11.5, and 310±17.3 sec, respectively. Conclusion: Our simplified dynamic phantom for pediatric renography could imitate the time activity curves obtained from patients with normal renal function. Tmax, T2/3, and T1/2 could be measured under various settings of dose, collimator, and tissue attenuation.
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Affiliation(s)
- Takashi Kamiya
- Division of Radiology, Department of Medical Technology, Osaka University Hospital, Suita, Japan.,Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan
| | - Tadashi Watabe
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan
| | - Koichi Fujino
- Division of Radiology, Department of Medical Technology, Osaka University Hospital, Suita, Japan
| | - Romanov Victor
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan
| | - Yoshiki Kawamura
- Division of Radiology, Department of Medical Technology, Osaka University Hospital, Suita, Japan
| | - Kayako Isohashi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan
| | - Keiko Matsunaga
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan.,Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Suita, Japan
| | - Mitsuaki Tatsumi
- Department of Radiology, Osaka University Hospital, Suita, Japan.,Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Hiroki Kato
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan
| | - Eku Shimosegawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan.,Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Suita, Japan
| | - Jun Hatazawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan.,Immunology Frontier Research Center, Osaka University, Suita, Japan
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18
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Beshr R, Isohashi K, Watabe T, Naka S, Horitsugi G, Romanov V, Kato H, Miyatake SI, Shimosegawa E, Hatazawa J. Preliminary feasibility study on differential diagnosis between radiation-induced cerebral necrosis and recurrent brain tumor by means of [ 18F]fluoro-borono-phenylalanine PET/CT. Ann Nucl Med 2018; 32:702-708. [PMID: 30194665 DOI: 10.1007/s12149-018-1296-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 08/30/2018] [Indexed: 12/15/2022]
Abstract
OBJECTIVES A previous study reported that a differential diagnosis between glioblastoma progression and radiation necrosis by 4-borono-2-[18F]-fluoro-phenylalanine ([18F]FBPA) PET can be made based on lesion-to-normal ratio of [18F]FBPA accumulation. Two-dimensional data acquisition mode PET alone system, with in-plane resolution of 7.9 mm and axial resolution of 13.9 mm, was used. In the current study, we aimed to confirm the differential diagnostic capability of [18F]FBPA PET/CT with higher PET spatial resolution by three-dimensional visual inspection and by measuring mean standardized uptake value (SUVmean), maximum SUV (SUVmax), metabolic tumor volume (MTV), and total lesion (TL) [18F]FBPA uptake. METHODS Twelve patients of glioma (9), malignant meningioma (1), hemangiopericytoma (1), and metastatic brain tumor (1) were enrolled. All had preceding radiotherapy. High-resolution three-dimensional data acquisition mode PET/CT with in-plane resolution of 4.07 mm and axial resolution of 5.41 mm was employed for imaging. Images were three-dimensionally analyzed using the PMOD software. SUVmean and SUVmax of lesion and normal brain were measured. Lesion MTV and TL FBPA uptake were calculated. The diagnostic accuracy of [18F]FBPA PET/CT in detecting recurrence (n = 6) or necrosis (n = 6) was verified by clinical follow-up. RESULTS All parameters showed significantly higher values for tumor recurrence than for necrosis. SUVmean in recurrence was 2.95 ± 0.84 vs 1.18 ± 0.24 in necrosis (P = 0.014); SUVmax in recurrence was 4.63 ± 1.23 vs 1.93 ± 0.44 in necrosis (P = 0.014); MTV in recurrence was 44.92 ± 28.93 mL vs 10.66 ± 8.46 mL in necrosis (P = 0.032); and mean TL FBPA uptake in recurrence was 121.01 ± 50.48 g vs 12.36 ± 9.70 g in necrosis (P = 0.0029). CONCLUSION In this preliminary feasibility study, we confirmed the possibility of differentiating tumor recurrence from radiation necrosis in patients with irradiated brain tumors by [18F]FBPA PET/CT using indices of SUVmean, SUVmax, MTV, and TL 18FBPA uptake.
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Affiliation(s)
- Rouaa Beshr
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan.,Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
| | - Kayako Isohashi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Tadashi Watabe
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Sadahiro Naka
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Genki Horitsugi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Victor Romanov
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan.,Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
| | - Hiroki Kato
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Shin-Ichi Miyatake
- Department of Neurosurgery, Osaka Medical College, Takatsuki, Osaka, Japan
| | - Eku Shimosegawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan.,Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Jun Hatazawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan. .,Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan.
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Yajima S, Miyagawa S, Fukushima S, Sakai Y, Isohashi K, Watabe T, Ikeda H, Horitsugi G, Harada A, Sakaniwa R, Hatazawa J, Sawa Y. A prostacyclin agonist and an omental flap increased myocardial blood flow in a porcine chronic ischemia model. J Thorac Cardiovasc Surg 2018; 156:229-241.e14. [DOI: 10.1016/j.jtcvs.2018.02.086] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 01/29/2018] [Accepted: 02/07/2018] [Indexed: 12/14/2022]
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Aoe J, Watabe T, Shimosegawa E, Kato H, Kanai Y, Naka S, Matsunaga K, Isohashi K, Tatsumi M, Hatazawa J. Evaluation of the default-mode network by quantitative 15O-PET: comparative study between cerebral blood flow and oxygen consumption. Ann Nucl Med 2018; 32:485-491. [PMID: 29934675 PMCID: PMC6061207 DOI: 10.1007/s12149-018-1272-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Accepted: 06/19/2018] [Indexed: 11/29/2022]
Abstract
Objective Resting-state functional MRI (rs-fMRI) has revealed the existence of a default-mode network (DMN) based on spontaneous oscillations of the blood oxygenation level-dependent (BOLD) signal. The BOLD signal reflects the deoxyhemoglobin concentration, which depends on the relationship between the regional cerebral blood flow (CBF) and the cerebral metabolic rate of oxygen (CMRO2). However, these two factors cannot be separated in BOLD rs-fMRI. In this study, we attempted to estimate the functional correlations in the DMN by means of quantitative 15O-labeled gases and water PET, and to compare the contribution of the CBF and CMRO2 to the DMN. Methods Nine healthy volunteers (5 men and 4 women; mean age, 47.0 ± 1.2 years) were studied by means of 15O-O2, 15O-CO gases and 15O-water PET. Quantitative CBF and CMRO2 images were generated by an autoradiographic method and transformed into MNI standardized brain template. Regions of interest were placed on normalized PET images according to the previous rs-fMRI study. For the functional correlation analysis, the intersubject Pearson’s correlation coefficients (r) were calculated for all pairs in the brain regions and correlation matrices were obtained for CBF and CMRO2, respectively. We defined r > 0.7 as a significant positive correlation and compared the correlation matrices of CBF and CMRO2. Results Significant positive correlations (r > 0.7) were observed in 24 pairs of brain regions for the CBF and 22 pairs of brain regions for the CMRO2. Among them, 12 overlapping networks were observed between CBF and CMRO2. Correlation analysis of CBF led to the detection of more brain networks as compared to that of CMRO2, indicating that the CBF can capture the state of the spontaneous activity with a higher sensitivity. Conclusions We estimated the functional correlations in the DMN by means of quantitative PET using 15O-labeled gases and water. The correlation matrix derived from the CBF revealed a larger number of brain networks as compared to that derived from the CMRO2, indicating that contribution to the functional correlation in the DMN is higher in the blood flow more than the oxygen consumption.
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Affiliation(s)
- Jo Aoe
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Tadashi Watabe
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
| | - Eku Shimosegawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Hiroki Kato
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yasukazu Kanai
- Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Sadahiro Naka
- Department of Pharmacology, Osaka University Hospital, 2-15 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Keiko Matsunaga
- Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Kayako Isohashi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Mitsuaki Tatsumi
- Department of Radiology, Osaka University Hospital, 2-15 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Jun Hatazawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
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21
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Alobthani G, Romanov V, Isohashi K, Matsunaga K, Watabe T, Kato H, Tatsumi M, Shimosegawa E, Hatazawa J. Value of 18F-FDG PET/CT in discrimination between indolent and aggressive non-Hodgkin's lymphoma: A study of 328 patients. Hell J Nucl Med 2018; 21:7-14. [PMID: 29550841 DOI: 10.1967/s002449910701] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 01/26/2018] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Non-Hodgkin's lymphoma (NHL) cases with inconclusive biopsy findings are not infrequently referred for fluorine-18-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT). We searched for maximum standardized uptake value (SUVmax) cut-off values that could discriminate between indolent and aggressive NHL in conventional non-time of flight (non-TOF) 18F-FDG PET/CT and TOF 18F-FDG PET/CT. SUBJECTS AND METHODS Retrospectively, 328 patients were selected by the following inclusion criteria: biopsy-proven NHL with no more than one histopathological type; new cases with less than 90 days between obtaining biopsy and 18F-FDG PET/CT scanning; recurrent cases with time interval more than six months since the last therapy with no history of transformation; and blood glucose less than 150mg/dL. Two hundred forty six (246) selected patients were scanned with non-TOF PET/CT, and 82 patients were scanned with TOF 18F-FDG PET/CT. RESULTS The SUVmax of NHL tends to be higher in TOF 18F-FDG PET/CT than non-TOF 18F-FDG PET/CT. New aggressive NHL had significantly higher SUVmax than new indolent NHL in both, non-TOF 18F-FDG PET/CT (13.6±7.7g/mL vs. 5.3±3.4g/mL, P<0.0001) and TOF 18F-FDG PET/CT (20.5±9.8g/mL vs. 6.6±4.7g/mL, P<0.0001). A receiver operating characteristic curve analysis for new cases in non-TOF 18F-FDG PET/CT (n=204), demonstrated SUVmax of 10g/mL as the most balanced cut-off between aggressive and indolent NHL, with the area under the curve (AUC) of 86%, specificity of 94%, and sensitivity of 71%. While SUVmax of 13g/mL was the most balanced cut-off for new cases in TOF 18F-FDG PET/CT (n=57), with AUC of 91%, specificity of 95.5%, and sensitivity of 77%. CONCLUSION Both SUVmax>10g/mL in non-TOF 18F-FDG PET/CT and >13g/mL in TOF 18F-FDG PET/CT were highly suggestive of an aggressive nature of NHL, while there was an overlap between indolent and aggressive NHL in the lower SUVmax levels.
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Affiliation(s)
- Galal Alobthani
- Department of Nuclear Medicine and Tracer Kinetics, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka, Japan.
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22
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Horitsugi G, Watabe T, Kanai Y, Ikeda H, Kato H, Naka S, Ishibashi M, Matsunaga K, Isohashi K, Shimosegawa E, Hatazawa J. Oxygen-15 labeled CO 2, O 2, and CO PET in small animals: evaluation using a 3D-mode microPET scanner and impact of reconstruction algorithms. EJNMMI Res 2017; 7:91. [PMID: 29080056 PMCID: PMC5660010 DOI: 10.1186/s13550-017-0335-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 10/16/2017] [Indexed: 11/10/2022] Open
Abstract
Background Positron emission tomography (PET) studies using 15O-labeled CO2, O2, and CO have been used in humans to evaluate cerebral blood flow (CBF), the cerebral oxygen extraction fraction (OEF), and the cerebral metabolic rate of oxygen (CMRO2) and cerebral blood volume (CBV), respectively. In preclinical studies, however, PET studies using 15O-labeled gases are not widely performed because of the technical difficulties associated with handling labeled gases with a short half-life. The aims of the present study were to evaluate the scatter fraction using 3D-mode micro-PET for 15O-labeled gas studies and the influence of reconstruction algorithms on quantitative values. Nine male SD rats were studied using the steady state inhalation method for 15O-labeled gases with arterial blood sampling. The resulting PET images were reconstructed using filtered back projection (FBP), ordered-subset expectation maximization (OSEM) 2D, or OSEM 3D followed by maximum a posteriori (OSEM3D-MAP). The quantitative values for each brain region and each reconstruction method were calculated by applying different reconstruction methods. Results The quantitative values for the whole brain as calculated using FBP were 46.6 ± 12.5 mL/100 mL/min (CBF), 63.7 ± 7.2% (OEF), 5.72 ± 0.34 mL/100 mL/min (CMRO2), and 5.66 ± 0.34 mL/100 mL (CBV), respectively. The CBF and CMRO2 values were significantly higher when the OSEM2D and OSEM3D-MAP reconstruction methods were used, compared with FBP, whereas the OEF values were significantly lower when reconstructed using OSEM3D-MAP. Conclusions We evaluated the difference in quantitative values among the reconstruction algorithms using 3D-mode micro-PET. The iterative reconstruction method resulted in significantly higher quantitative values for CBF and CMRO2, compared with the values calculated using the FBP reconstruction method. Electronic supplementary material The online version of this article (10.1186/s13550-017-0335-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Genki Horitsugi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Tadashi Watabe
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Medical Imaging Center for Translational Research, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yasukazu Kanai
- Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Medical Imaging Center for Translational Research, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Hayato Ikeda
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Hiroki Kato
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Medical Imaging Center for Translational Research, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Sadahiro Naka
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Mana Ishibashi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Keiko Matsunaga
- Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Medical Imaging Center for Translational Research, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Kayako Isohashi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Medical Imaging Center for Translational Research, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Eku Shimosegawa
- Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Medical Imaging Center for Translational Research, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Jun Hatazawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan. .,Medical Imaging Center for Translational Research, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
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Wu R, Watanabe Y, Arisawa A, Takahashi H, Tanaka H, Fujimoto Y, Watabe T, Isohashi K, Hatazawa J, Tomiyama N. Whole-tumor histogram analysis of the cerebral blood volume map: tumor volume defined by 11C-methionine positron emission tomography image improves the diagnostic accuracy of cerebral glioma grading. Jpn J Radiol 2017; 35:613-621. [PMID: 28879406 DOI: 10.1007/s11604-017-0675-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 08/04/2017] [Indexed: 11/27/2022]
Abstract
PURPOSE This study aimed to compare the tumor volume definition using conventional magnetic resonance (MR) and 11C-methionine positron emission tomography (MET/PET) images in the differentiation of the pre-operative glioma grade by using whole-tumor histogram analysis of normalized cerebral blood volume (nCBV) maps. MATERIALS AND METHODS Thirty-four patients with histopathologically proven primary brain low-grade gliomas (n = 15) and high-grade gliomas (n = 19) underwent pre-operative or pre-biopsy MET/PET, fluid-attenuated inversion recovery, dynamic susceptibility contrast perfusion-weighted magnetic resonance imaging, and contrast-enhanced T1-weighted at 3.0 T. The histogram distribution derived from the nCBV maps was obtained by co-registering the whole tumor volume delineated on conventional MR or MET/PET images, and eight histogram parameters were assessed. RESULTS The mean nCBV value had the highest AUC value (0.906) based on MET/PET images. Diagnostic accuracy significantly improved when the tumor volume was measured from MET/PET images compared with conventional MR images for the parameters of mean, 50th, and 75th percentile nCBV value (p = 0.0246, 0.0223, and 0.0150, respectively). CONCLUSION Whole-tumor histogram analysis of CBV map provides more valuable histogram parameters and increases diagnostic accuracy in the differentiation of pre-operative cerebral gliomas when the tumor volume is derived from MET/PET images.
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Affiliation(s)
- Rongli Wu
- Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yoshiyuki Watanabe
- Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
| | - Atsuko Arisawa
- Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Hiroto Takahashi
- Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Hisashi Tanaka
- Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yasunori Fujimoto
- Department of Neurosurgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Tadashi Watabe
- Department of Nuclear Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Kayako Isohashi
- Department of Nuclear Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Jun Hatazawa
- Department of Nuclear Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Noriyuki Tomiyama
- Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
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24
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Mochida I, Shimosegawa E, Kanai Y, Naka S, Matsunaga K, Isohashi K, Horitsugi G, Watabe T, Kato H, Hatazawa J. Whole-Body Distribution of Donepezil as an Acetylcholinesterase Inhibitor after Oral Administration in Normal Human Subjects: A 11C-donepezil PET Study. Asia Ocean J Nucl Med Biol 2017; 5:3-9. [PMID: 28840133 PMCID: PMC5221682 DOI: 10.22038/aojnmb.2016.7513] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Objective(s): It is difficult to investigate the whole-body distribution of an orally administered drug by means of positron emission tomography (PET), owing to the short physical half-life of radionuclides, especially when 11C-labeled compounds are tested. Therefore, we aimed to examine the whole-body distribution of donepezil (DNP) as an acetylcholinesterase inhibitor by means of 11C-DNP PET imaging, combined with the oral administration of pharmacological doses of DNP. Methods: We studied 14 healthy volunteers, divided into group A (n=4) and group B (n=10). At first, we studied four females (mean age: 57.3±4.5 y), three of whom underwent 11C-DNP PET scan at 2.5 h after the oral administration of 1 mg and 30 µg of DNP, respectively, while one patient was scanned following the oral administration of 30 µg of DNP (group A). Then, we studied five females and five males (48.3±6.1 y), who underwent 11C-DNP PET scan, without the oral administration of DNP (group B). Plasma DNP concentration upon scanning was measured by tandem mass spectrometry. Arterialized venous blood samples were collected periodically to measure plasma radioactivity and metabolites. In group A, 11C-DNP PET scan of the brain and whole body continued for 60 and 20 min, respectively. Subjects in group B underwent sequential whole-body scan for 60 min. The regional uptake of 11C-DNP was analyzed by measuring the standard uptake value (SUV) through setting regions of interest on major organs with reference CT. Results: In group A, plasma DNP concentration was significantly correlated with the orally administered dose of DNP. The mean plasma concentration was 2.00 nM (n=3) after 1 mg oral administration and 0.06 nM (n=4) after 30 µg oral administration. No significant difference in plasma radioactivity or fraction of metabolites was found between groups A and B. High 11C-DNP accumulation was found in the liver, stomach, pancreas, brain, salivary glands, bone marrow, and myocardium in groups A and B, in this order. No significant difference in SUV value was found among 11C-DNP PET studies after the oral administration of 1 mg of DNP, 30 µg of DNP, or no DNP. Conclusion: The present study demonstrated that the whole-body distribution of DNP after the oral administration of pharmacological doses could be evaluated by 11C-DNP PET studies, combined with the oral administration of DNP.
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Affiliation(s)
- Ikuko Mochida
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan.,Osaka University Graduate School of Medicine, Immunology Frontier Research Center, Osaka, Japan
| | - Eku Shimosegawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan.,Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yasukazu Kanai
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan.,Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Sadahiro Naka
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan.,Osaka University Hospital, Osaka, Japan
| | - Keiko Matsunaga
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan.,Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Kayako Isohashi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Genki Horitsugi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Tadashi Watabe
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hiroki Kato
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Jun Hatazawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan.,Osaka University Graduate School of Medicine, Immunology Frontier Research Center, Osaka, Japan
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25
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Watabe T, Kanai Y, Ikeda H, Horitsugi G, Matsunaga K, Kato H, Isohashi K, Abe K, Shimosegawa E, Hatazawa J. Quantitative evaluation of oxygen metabolism in the intratumoral hypoxia: 18F-fluoromisonidazole and 15O-labelled gases inhalation PET. EJNMMI Res 2017; 7:16. [PMID: 28210996 PMCID: PMC5313496 DOI: 10.1186/s13550-017-0263-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 02/07/2017] [Indexed: 11/10/2022] Open
Abstract
Background Intratumoral hypoxia is one of the resistant factors in radiotherapy and chemotherapy for cancer. Although it is detected by 18F-fluoromisonidazole (FMISO) PET, the relationship between intratumoral hypoxia and oxygen metabolism has not been studied. The purpose of this study was to evaluate the intratumoral perfusion and oxygen metabolism in hypoxic regions using the rat xenograft model. Ten male Fischer rats with C6 glioma (body weight = 220 ± 15 g) were investigated with 18F-FMISO PET and steady-state inhalation method of 15O-labelled gases PET. The tumoral blood flow (TBF), tumoral metabolic rate of oxygen (TMRO2), oxygen extraction fraction (OEF), and tumoral blood volume (TBV) were measured under artificial ventilation with 15O–CO2, 15O–O2, and 15O–CO gases. Multiple volumes of interest (1-mm diameter sphere) were placed on the co-registered 18F-FMISO (3 h post injection) and functional 15O-labelled gases PET images. The TBF, TMRO2, OEF, and TBV values were compared among the three groups classified by the 18F-FMISO uptake as follows: group Low (L), less than 1.0; group Medium (M), between 1.0 and 2.0; and group High (H), more than 2.0 in the 18F-FMISO standardized uptake value (SUV). Results There were moderate negative correlations between 18F-FMISO SUV and TBF (r = −0.56 and p < 0.01), and weak negative correlations between 18F-FMISO SUV and TMRO2 (r = −0.38 and p < 0.01) and 18F-FMISO SUV and TBV (r = −0.38 and p < 0.01). Quantitative values were as follows: TBF, (L) 55 ± 30, (M) 32 ± 17, and (H) 30 ± 15 mL/100 mL/min; OEF, (L) 33 ± 14, (M) 36 ± 17, and (H) 41 ± 16%; TMRO2, (L) 2.8 ± 1.3, (M) 1.9 ± 1.0, and (H) 2.1 ± 1.1 mL/100 mL/min; and TBV, (L) 5.7 ± 2.1, (M) 4.3 ± 1.9, and (H) 3.9 ± 1.2 mL/100 mL, respectively. Intratumoral hypoxic regions (M and H) showed significantly lower TBF, TMRO2, and TBV values than non-hypoxic regions (L). OEF showed significant increase in the severe hypoxic region compared to non-hypoxic and mild hypoxic regions. Conclusions This study demonstrated that intratumoral hypoxic regions showed decreased blood flow with increased oxygen extraction, suggesting the need for a treatment strategy to normalize the blood flow for oxygen-avid active tumor cells in hypoxic regions. Electronic supplementary material The online version of this article (doi:10.1186/s13550-017-0263-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Tadashi Watabe
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan. .,Medical Imaging Center for Translational Research, Osaka University Graduate School of Medicine, Suita, Japan.
| | - Yasukazu Kanai
- Medical Imaging Center for Translational Research, Osaka University Graduate School of Medicine, Suita, Japan.,Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Suita, Japan
| | - Hayato Ikeda
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan
| | - Genki Horitsugi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan
| | - Keiko Matsunaga
- Medical Imaging Center for Translational Research, Osaka University Graduate School of Medicine, Suita, Japan.,Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Suita, Japan
| | - Hiroki Kato
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan.,Medical Imaging Center for Translational Research, Osaka University Graduate School of Medicine, Suita, Japan
| | - Kayako Isohashi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan.,Medical Imaging Center for Translational Research, Osaka University Graduate School of Medicine, Suita, Japan
| | - Kohji Abe
- Medical Imaging Center for Translational Research, Osaka University Graduate School of Medicine, Suita, Japan.,Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Suita, Japan.,Department of Drug Metabolism & Pharmacokinetics, Osaka University Graduate School of Medicine, Suita, Japan
| | - Eku Shimosegawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan.,Medical Imaging Center for Translational Research, Osaka University Graduate School of Medicine, Suita, Japan.,Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Suita, Japan
| | - Jun Hatazawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan.,Medical Imaging Center for Translational Research, Osaka University Graduate School of Medicine, Suita, Japan.,Research Laboratory for Development, Shionogi & Co., Ltd.; Immunology Frontier Research Center, Osaka University, Suita, Japan
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Wada R, Kamiya T, Fujino K, Ueda J, Isohashi K, Tatsumi M, Hatazawa J. [Creation and Evaluation of Educational Programs for Additional Delayed Scan of FDG-PET/CT]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2017; 73:1119-1124. [PMID: 29151544 DOI: 10.6009/jjrt.2017_jsrt_73.11.1119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
UNLABELLED Generally, FDG-PET/CT image is acquired at the 60th minute after tracer administration. Depending on the clinical case, additional delayed scans may be useful. However, it is difficult to judge whether additional delayed scan is useful or not. The purposes of this study were creation and evaluation of educational programs to help radiological technologists to decide the usefulness of additional delayed scan of FDG-PET/CT. METHODS Educational programs consisted of the instructional materials and the judgment test of clinical cases. The instructional materials provided the valuable findings for differentiation between uptake in the wall of the colon and colon content, distinction between uptake in the lymph node and urinary tract, and evaluation of malignancy. The judgment test of clinical cases consisted of 10 cases selected by a nuclear medicine physician (for 5 of that cases additional delayed scan was decided to be useful). Five experienced technologists and five inexperienced technologists scored the volubility of additional delayed scan pre- and post-training using the instructional materials (the full marks of score is 5). RESULTS After the educational programs using the instructional materials, the score was improved with the significant difference in both experienced (pre: 3.6±1.4, post: 4.0±1.2) and inexperienced (pre: 2.8±1.5, post: 3.7±1.5) groups (p<0.05). CONCLUSION According to the educational programs, technologist might be able to decide whether the additional delayed scan is useful or not. The successful results of this study may improve the interpretation or reduce the total exposure dose of the PET/CT scan.
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Affiliation(s)
- Ryota Wada
- Division of Radiology, Department of Medical Technology, Osaka University Hospital
| | - Takashi Kamiya
- Division of Radiology, Department of Medical Technology, Osaka University Hospital
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine
| | - Kouichi Fujino
- Division of Radiology, Department of Medical Technology, Osaka University Hospital
| | - Junpei Ueda
- Division of Radiology, Department of Medical Technology, Osaka University Hospital
| | - Kayako Isohashi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine
| | - Mitsuaki Tatsumi
- Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine
- Department of Radiology, Osaka University Hospital
| | - Jun Hatazawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine
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Isohashi K, Shimosegawa E, Naka S, Kanai Y, Horitsugi G, Mochida I, Matsunaga K, Watabe T, Kato H, Tatsumi M, Hatazawa J. Comparison of the image-derived radioactivity and blood-sample radioactivity for estimating the clinical indicators of the efficacy of boron neutron capture therapy (BNCT): 4-borono-2- 18F-fluoro-phenylalanine (FBPA) PET study. EJNMMI Res 2016; 6:75. [PMID: 27757932 PMCID: PMC5069228 DOI: 10.1186/s13550-016-0230-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 10/04/2016] [Indexed: 11/10/2022] Open
Abstract
Background In boron neutron capture therapy (BNCT), positron emission tomography (PET) with 4-borono-2-18F-fluoro-phenylalanine (FBPA) is the only method to estimate an accumulation of 10B to target tumor and surrounding normal tissue after administering 10B carrier of L-paraboronophenylalanine and to search the indication of BNCT for individual patient. Absolute concentration of 10B in tumor has been estimated by multiplying 10B concentration in blood during BNCT by tumor to blood radioactivity (T/B) ratio derived from FBPA PET. However, the method to measure blood radioactivity either by blood sampling or image data has not been standardized. We compared image-derived blood radioactivity of FBPA with blood sampling data and studied appropriate timing and location for measuring image-derived blood counts. Methods We obtained 7 repeated whole-body PET scans in five healthy subjects. Arterialized venous blood samples were obtained from the antecubital vein, heated in a heating blanket. Time-activity curves (TACs) of image-derived blood radioactivity were obtained using volumes of interest (VOIs) over ascending aorta, aortic arch, pulmonary artery, left and right ventricles, inferior vena cava, and abdominal aorta. Image-derived blood radioactivity was compared with those measured by blood sampling data in each location. Results Both the TACs of blood sampling radioactivity in each subject, and the TACs of image-derived blood radioactivity showed a peak within 5 min after the tracer injection, and promptly decreased soon thereafter. Linear relationship was found between blood sampling radioactivity and image-derived blood radioactivity in all the VOIs at any timing of data sampling (p < 0.001). Image-derived radioactivity measured in the left and right ventricles 30 min after injection showed high correlation with blood radioactivity. Image-derived blood radioactivity was lower than blood sampling radioactivity data by 20 %. Reduction of blood radioactivity of FBPA in left ventricle after 30 min of FBPA injection was minimal. Conclusion We conclude that the image-derived T/B ratio can be reliably used by setting the VOI on the left ventricle at 30 min after FBPA administration and correcting for underestimation due to partial volume effect and reduction of FBPA blood radioactivity.
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Affiliation(s)
- Kayako Isohashi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita City, Osaka, 565-0871, Japan.
| | - Eku Shimosegawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita City, Osaka, 565-0871, Japan.,Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Suita City, Osaka, Japan
| | - Sadahiro Naka
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita City, Osaka, 565-0871, Japan
| | - Yasukazu Kanai
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita City, Osaka, 565-0871, Japan.,Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Suita City, Osaka, Japan
| | - Genki Horitsugi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita City, Osaka, 565-0871, Japan
| | - Ikuko Mochida
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita City, Osaka, 565-0871, Japan
| | - Keiko Matsunaga
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita City, Osaka, 565-0871, Japan.,Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Suita City, Osaka, Japan
| | - Tadashi Watabe
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita City, Osaka, 565-0871, Japan
| | - Hiroki Kato
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita City, Osaka, 565-0871, Japan
| | - Mitsuaki Tatsumi
- Department of Radiology, Osaka University Graduate School of Medicine, Suita City, Osaka, Japan
| | - Jun Hatazawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita City, Osaka, 565-0871, Japan.,Department of Immunology Frontier Research Center, Osaka University, Suita City, Osaka, Japan
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Shimosegawa E, Isohashi K, Naka S, Horitsugi G, Hatazawa J. Assessment of 10B concentration in boron neutron capture therapy: potential of image-guided therapy using 18FBPA PET. Ann Nucl Med 2016; 30:749-755. [PMID: 27586407 DOI: 10.1007/s12149-016-1121-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 08/29/2016] [Indexed: 11/24/2022]
Abstract
OBJECTIVES In boron neutron capture therapy (BNCT) for cancer, the accurate estimation of 10B tissue concentrations, especially in neighboring normal organs, is important to avoid adverse effects. The 10B concentration in normal organs after loading with 10B, however, has not been established in humans. In this study, we performed 4-borono-2-[18F]-fluoro-phenylalanine (18FBPA) PET in healthy volunteers and estimated the chronological changes in the 10B concentrations of normal organs. METHODS In 6 healthy volunteers, whole-body 18FBPA PET scans were repeated 7 times during 1 h, and the mean 18FBPA distributions of 13 organs were measured. Based on the 18FBPA PET data, we then estimated the changes in the 10B concentrations of the organs when the injection of a therapeutic dose of 10BPA-fructose complex (10BPA-fr; 30 g, 500 mg/kg body weight) was assumed. RESULTS The maximum mean 18FBPA concentrations were reached at 2-6 min after injection in all the organs except the brain and urinary bladder. The mean 18FBPA concentration in normal brain plateaued at 24 min after injection. When the injection of a therapeutic dose of 10BPA-fr was assumed, the estimated mean 10B concentration in the kidney increased to 126.1 ± 24.2 ppm at 3 min after injection and then rapidly decreased to 30.9 ± 7.4 ppm at 53 min. The estimated mean 10B concentration in the bladder gradually increased and reached 383.6 ± 214.7 ppm at 51 min. The mean 10B concentration in the brain was estimated to be 7.6 ± 1.5 ppm at 57 min. CONCLUSIONS 18FBPA PET has a potential to estimate 10B concentration of normal organs before neutron irradiation of BNCT when several assumptions are validated in the future studies.
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Affiliation(s)
- Eku Shimosegawa
- Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Suita, Japan. .,Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan.
| | - Kayako Isohashi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan
| | | | | | - Jun Hatazawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan
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Yajima S, Miyagawa S, Fukushima S, Sakai Y, Harada A, Isohashi K, Watabe T, Ikeda H, Horitsugi G, Hatazawa J, Sawa Y. 172 A Slow-Releasing Synthetic Prostacyclin Agonist “Ono 1301-sr†Combined with Omental Flap Increases Myocardial Blood Flow and Reduces Microvascular Resistance, Associated with Functional Recovery, in a Porcine Chronic Myocardial Infarction Model. Heart 2016. [DOI: 10.1136/heartjnl-2016-309890.172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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30
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Isohashi K, Tatsumi M, Kato H, Fukushima K, Maeda T, Watabe T, Shimosegawa E, Kanakura Y, Hatazawa J. Prognostic Value of FDG-PET, Based on the Revised Response Criteria, in Patients with Malignant Lymphoma: A Comparison with CT/MRI Evaluations, Based on the International Working Group/Cotswolds Meeting Criteria. Asia Ocean J Nucl Med Biol 2015; 3:91-8. [PMID: 27408888 PMCID: PMC4937646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVES Post-treatment evaluations by CT/MRI (based on the International Working Group/Cotswolds meeting guidelines) and PET (based on Revised Response Criteria), were examined in terms of progression-free survival (PFS) in patients with malignant lymphoma (ML). METHODS 79 patients, undergoing CT/MRI for the examination of suspected lesions and whole-body PET/CT before and after therapy, were included in the study during April 2007-January 2013. The relationship between post-treatment evaluations (CT/MRI and PET) and PFS during the follow-up period was examined, using Kaplan-Meier survival analysis. The patients were grouped according to the histological type into Hodgkin's lymphoma (HL), diffuse large B-cell lymphoma (DLBCL), and other histological types. The association between post-treatment evaluations (PET or PET combined with CT/MRI) and PFS was examined separately. Moreover, the relationship between disease recurrence and serum soluble interleukin-2 receptor, lactic dehydrogenase, and C-reactive protein levels was evaluated before and after the treatment. RESULTS Patients with incomplete remission on both CT/MRI and PET had a significantly shorter PFS, compared to patients with complete remission on both CT/MRI and PET and those exhibiting incomplete remission on CT/MRI and complete remission on PET (P<0.001). Post-treatment PET evaluations were strongly correlated with patient outcomes in cases with HL or DLBCL (P<0.01) and other histological types (P<0.001). In patients with HL or DLBCL, incomplete remission on both CT/MRI and PET was associated with a significantly shorter PFS, compared to patients with complete remission on both CT/MRI and PET (P<0.05) and those showing incomplete remission on CT/MRI and complete remission on PET (P<0.01). In patients with other histological types, incomplete remission on both CT/MRI and PET was associated with a significantly shorter PFS, compared to cases with complete remission on both CT/MRI and PET (P<0.001). None of the serum parameters differed significantly between recurrent and non-recurrent cases. CONCLUSION Post-treatment PET evaluations were well correlated with the outcomes of patients with ML, exhibiting FDG uptake. Among patients with HL or DLBCL, a post-treatment complete remission on PET was predictive of a relatively long PFS. For predicting the prognosis of patients with other histological types, a combination of CT/MRI and PET, rather than PET alone, is recommended.
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Affiliation(s)
- Kayako Isohashi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan,
*Corresponding author: Kayako Isohashi, 2-2, Yamadaoka, Suita City, Osaka, 565-0871, Japan. Tel: +81-6-6879-3461; Fax: +81-6-6879-3469; E-mail:
| | - Mitsuaki Tatsumi
- Department of Radiology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hiroki Kato
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Kentaro Fukushima
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Tetsuo Maeda
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Tadashi Watabe
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Eku Shimosegawa
- Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yuzuru Kanakura
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Jun Hatazawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan,Department of Radiology, Osaka University Graduate School of Medicine, Osaka, Japan,Immunology Frontier Research Center, Osaka University, Osaka, Japan
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Hanaoka K, Watabe T, Naka S, Kanai Y, Ikeda H, Horitsugi G, Kato H, Isohashi K, Shimosegawa E, Hatazawa J. FBPA PET in boron neutron capture therapy for cancer: prediction of (10)B concentration in the tumor and normal tissue in a rat xenograft model. EJNMMI Res 2014; 4:70. [PMID: 25621196 PMCID: PMC4293470 DOI: 10.1186/s13550-014-0070-2] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Accepted: 11/27/2014] [Indexed: 11/10/2022] Open
Abstract
Background Boron neutron capture therapy (BNCT) is a molecular radiation treatment based on the 10B (n, α) 7Li nuclear reaction in cancer cells, in which delivery of 10B by 4-borono-phenylalanine conjugated with fructose (BPA-fr) to the cancer cells is of critical importance. The PET tracer 4-borono-2-18 F-fluoro-phenylalanine (FBPA) has been used to predict the accumulation of BPA-fr before BNCT. However, because of the difference in chemical structure between BPA-fr and FBPA and the difference in the dose administered between BPA-fr (therapeutic dose) and FBPA (tracer dose), the predictive value of FBPA PET for BPA-fr accumulation in the tumor and normal tissues is not yet clearly proven. We conducted this study to validate FBPA PET as a useful test to predict the accumulation of BPA-fr in the tumor and normal tissues before BNCT. Methods RGC-6 rat glioma cells (1.9 × 107) were implanted subcutaneously in seven male F344 rats. On day 20 after the tumor implantation, dynamic PET scan was performed on four rats after injection of FBPA for 1 h. Whole-body PET/CT was performed 1 h after intravenous injection of the FBPA solution (30.5 ± 0.7 MBq, 1.69 ± 1.21 mg/kg). PET accumulation of FBPA in the tumor tissue and various normal tissues was estimated as a percentage of the injected dose per gram (%ID/g). One hour after the PET/CT scan, BPA-fructose (167.32 ± 18.65 mg/kg) was injected intravenously, and the rats were dissected 1 h after the BPA-fr injection. The absolute concentration of 10B in the autopsied tissues and blood was measured by inductively coupled plasma optical emission spectrometry (ICP-OES). Results The highest absolute concentration of 10B determined by ICP-OES was found in the kidney (4.34 ± 0.84 %ID/g), followed by the pancreas (2.73 ± 0.63 %ID/g), and the tumor (1.44 ± 0.44 %ID/g). A significant positive correlation was found between the accumulation levels of BPA-fr and FBPA (r = 0.91, p < 0.05). Conclusions FBPA PET can reliably predict accumulation of BPA-fr in the tumor as well as normal tissues. Electronic supplementary material The online version of this article (doi:10.1186/s13550-014-0070-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Kohei Hanaoka
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan
| | - Tadashi Watabe
- Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Suita, Japan ; PET Molecular Imaging Center, Osaka University Graduate School of Medicine, Suita, Japan
| | | | - Yasukazu Kanai
- Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Suita, Japan ; PET Molecular Imaging Center, Osaka University Graduate School of Medicine, Suita, Japan
| | - Hayato Ikeda
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan
| | - Genki Horitsugi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan
| | - Hiroki Kato
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan ; PET Molecular Imaging Center, Osaka University Graduate School of Medicine, Suita, Japan
| | - Kayako Isohashi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan ; PET Molecular Imaging Center, Osaka University Graduate School of Medicine, Suita, Japan
| | - Eku Shimosegawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan ; PET Molecular Imaging Center, Osaka University Graduate School of Medicine, Suita, Japan
| | - Jun Hatazawa
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Japan ; PET Molecular Imaging Center, Osaka University Graduate School of Medicine, Suita, Japan ; Immunology Frontier Research Center, Osaka University, Suita, Japan
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Watabe T, Naka S, Ikeda H, Horitsugi G, Kanai Y, Isohashi K, Ishibashi M, Kato H, Shimosegawa E, Watabe H, Hatazawa J. Distribution of intravenously administered acetylcholinesterase inhibitor and acetylcholinesterase activity in the adrenal gland: 11C-donepezil PET study in the normal rat. PLoS One 2014; 9:e107427. [PMID: 25225806 PMCID: PMC4166663 DOI: 10.1371/journal.pone.0107427] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 08/10/2014] [Indexed: 12/30/2022] Open
Abstract
Purpose Acetylcholinesterase (AChE) inhibitors have been used for patients with Alzheimer's disease. However, its pharmacokinetics in non-target organs other than the brain has not been clarified yet. The purpose of this study was to evaluate the relationship between the whole-body distribution of intravenously administered 11C-Donepezil (DNP) and the AChE activity in the normal rat, with special focus on the adrenal glands. Methods The distribution of 11C-DNP was investigated by PET/CT in 6 normal male Wistar rats (8 weeks old, body weight = 220±8.9 g). A 30-min dynamic scan was started simultaneously with an intravenous bolus injection of 11C-DNP (45.0±10.7 MBq). The whole-body distribution of the 11C-DNP PET was evaluated based on the Vt (total distribution volume) by Logan-plot analysis. A fluorometric assay was performed to quantify the AChE activity in homogenized tissue solutions of the major organs. Results The PET analysis using Vt showed that the adrenal glands had the 2nd highest level of 11C-DNP in the body (following the liver) (13.33±1.08 and 19.43±1.29 ml/cm3, respectively), indicating that the distribution of 11C-DNP was the highest in the adrenal glands, except for that in the excretory organs. The AChE activity was the third highest in the adrenal glands (following the small intestine and the stomach) (24.9±1.6, 83.1±3.0, and 38.5±8.1 mU/mg, respectively), indicating high activity of AChE in the adrenal glands. Conclusions We demonstrated the whole-body distribution of 11C-DNP by PET and the AChE activity in the major organs by fluorometric assay in the normal rat. High accumulation of 11C-DNP was observed in the adrenal glands, which suggested the risk of enhanced cholinergic synaptic transmission by the use of AChE inhibitors.
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Affiliation(s)
- Tadashi Watabe
- Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
- PET molecular Imaging Center, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
- * E-mail:
| | | | - Hayato Ikeda
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Genki Horitsugi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yasukazu Kanai
- Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
- PET molecular Imaging Center, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Kayako Isohashi
- PET molecular Imaging Center, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Mana Ishibashi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Hiroki Kato
- PET molecular Imaging Center, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Eku Shimosegawa
- PET molecular Imaging Center, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Hiroshi Watabe
- Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
- PET molecular Imaging Center, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Jun Hatazawa
- PET molecular Imaging Center, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
- Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
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Watabe T, Shimosegawa E, Kato H, Isohashi K, Ishibashi M, Tatsumi M, Kitagawa K, Fujinaka T, Yoshimine T, Hatazawa J. Paradoxical reduction of cerebral blood flow after acetazolamide loading: a hemodynamic and metabolic study with (15)O PET. Neurosci Bull 2014; 30:845-56. [PMID: 25096497 DOI: 10.1007/s12264-013-1459-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Accepted: 01/23/2014] [Indexed: 10/25/2022] Open
Abstract
Paradoxical reduction of cerebral blood flow (CBF) after administration of the vasodilator acetazolamide is the most severe stage of cerebrovascular reactivity failure and is often associated with an increased oxygen extraction fraction (OEF). In this study, we aimed to reveal the mechanism underlying this phenomenon by focusing on the ratio of CBF to cerebral blood volume (CBV) as a marker of regional cerebral perfusion pressure (CPP). In 37 patients with unilateral internal carotid or middle cerebral arterial (MCA) steno-occlusive disease and 8 normal controls, the baseline CBF (CBF(b)), CBV, OEF, cerebral oxygen metabolic rate (CMRO2), and CBF after acetazolamide loading in the anterior and posterior MCA territories were measured by (15)O positron emission tomography. Paradoxical CBF reduction was found in 28 of 74 regions (18 of 37 patients) in the ipsilateral hemisphere. High CBF(b) (> 47.6 mL/100 mL/min, n = 7) was associated with normal CBF(b)/CBV, increased CBV, decreased OEF, and normal CMRO2. Low CBF(b) (< 31.8 mL/100 mL/min, n = 9) was associated with decreased CBF(b)/CBV, increased CBV, increased OEF, and decreased CMRO2. These findings demonstrated that paradoxical CBF reduction is not always associated with reduction of CPP, but partly includes high-CBF(b) regions with normal CPP, which has not been described in previous studies.
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Affiliation(s)
- Tadashi Watabe
- Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Suita, Japan,
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Isohashi K, Shimosegawa E, Kato H, Kanai Y, Naka S, Fujino K, Watabe H, Hatazawa J. Optimization of [11C]methionine PET study: appropriate scan timing and effect of plasma amino acid concentrations on the SUV. EJNMMI Res 2013; 3:27. [PMID: 23587060 PMCID: PMC3637362 DOI: 10.1186/2191-219x-3-27] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Accepted: 03/24/2013] [Indexed: 11/18/2022] Open
Abstract
Background [11C]methionine (MET) has been used to monitor amino acid metabolism in tumors, the pancreas, liver, and myocardium. The aim of the present study was to standardize [11C]MET positron emission tomography (PET) by optimizing the timing of initiation of the scan and applying correction to the plasma concentrations of neutral amino acids (NAAs), where necessary. Methods Sequential whole-body MET PET/computed tomography (CT) was performed in 11 normal adults after they had fasted for at least 4 h. After whole-body CT for attenuation correction and intravenous bolus injection of MET, the subjects were scanned from the parietal to the groin. The scanning was repeated six to seven times. Decay of radioactivity during the PET scan was corrected to the time of initiation of the first scan. The standardized uptake values (SUVs) were evaluated in various organs by setting regions of interest on the tomographic images. Plasma concentrations of NAAs were examined in relation to the SUV values. Results The SUVs in the pancreas reached their plateau from 6.5 to 11 min after the MET injection, and in the brain, lung, and myocardium, they reached their plateau from 19.6 to 24.1 min. The MET uptake in the spleen and kidney peaked early after the injection and steadily decreased thereafter. The SUVs in the liver and stomach wall rapidly increased during the first 0 to 4.5 min and gradually elevated thereafter during the scan period. Urinary radioactivity in the bladder reached its plateau from 26.1 to 30.6 min after the MET injection. There were no correlations between the plasma concentrations of NAAs and the maximal SUV in any organs. Conclusions The present study revealed the times taken to reach the plateau of MET uptake in various important organs, and little effects of the plasma neutral amino acid concentrations on the SUVs in PET studies conducted after the patients had fasted for at least 4 h. In the MET PET study, 4 h fasting period before MET administration and the scan initiation 20 min after MET administration provide the SUV values independent of scan initiation time and the plasma neutral amino acid concentrations.
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Affiliation(s)
- Kayako Isohashi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita City, Osaka 565-0871, Japan.
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Watabe T, Shimosegawa E, Watabe H, Kanai Y, Hanaoka K, Ueguchi T, Isohashi K, Kato H, Tatsumi M, Hatazawa J. Quantitative evaluation of cerebral blood flow and oxygen metabolism in normal anesthetized rats: 15O-labeled gas inhalation PET with MRI Fusion. J Nucl Med 2013; 54:283-90. [PMID: 23287575 DOI: 10.2967/jnumed.112.109751] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
UNLABELLED PET with (15)O gas has been used for the quantitative measurement of cerebral blood flow (CBF), cerebral metabolic rate of oxygen (CMRO(2)), oxygen extraction fraction (OEF), and cerebral blood volume (CBV) in humans. However, several technical difficulties limit its use in experiments on small animals. Herein, we describe the application of the (15)O gas steady-state inhalation method for normal anesthetized rats. METHODS Eight normal male Sprague-Dawley rats (mean body weight ± SD, 268 ± 14 g) under anesthesia were investigated by (15)O-labeled gas PET. After tracheotomy, an airway tube was placed in the trachea, and the animals were connected to a ventilator (tidal volume, 3 cm(3); frequency, 60/min). The CBF and OEF were measured according to the original steady-state inhalation technique under artificial ventilation with (15)O-CO(2) and (15)O-O(2) gases delivered through the radioactive gas stabilizer. CBV was measured by (15)O-CO gas inhalation and corrected for the intravascular hemoglobin-bound (15)O-O(2). Arterial blood sampling was performed during each study to measure the radioactivity of the whole blood and plasma. MR image was performed with the same acrylic animal holder immediately after the PET. Regions of interest were placed on the whole brain of the PET images with reference to the semiautomatically coregistered PET/MR fused images. RESULTS The data acquisition time for the whole PET experiment in each rat was 73.3 ± 5.8 (range, 68-85) min. In both the (15)O-CO(2) and the (15)O-O(2) studies, the radioactivity count of the brain reached a steady state by approximately 10 min after the start of continuous inhalation of the gas. The quantitative PET data of the whole brain were as follows: CBF, 32.3 ± 4.5 mL/100 mL/min; CMRO(2), 3.23 ± 0.42 mL/100 mL/min; OEF, 64.6% ± 9.1%; and CBV, 5.05 ± 0.45 mL/100 mL. CONCLUSION Although further technical improvements may be needed, this study demonstrated the feasibility of quantitative PET measurement of CBF, OEF, and CMRO(2) using the original steady-state inhalation method of (15)O-CO(2) and (15)O-O(2) gases and measurement of CBV using the (15)O-CO gas inhalation method in the brain of normal anesthetized rats.
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Affiliation(s)
- Tadashi Watabe
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
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Kinoshita M, Arita H, Goto T, Okita Y, Isohashi K, Watabe T, Kagawa N, Fujimoto Y, Kishima H, Shimosegawa E, Hatazawa J, Hashimoto N, Yoshimine T. A Novel PET Index, 18F-FDG–11C-Methionine Uptake Decoupling Score, Reflects Glioma Cell Infiltration. J Nucl Med 2012; 53:1701-8. [DOI: 10.2967/jnumed.112.104992] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Kato H, Shimosegawa E, Isohashi K, Kimura N, Kazui H, Hatazawa J. Distribution of cortical benzodiazepine receptor binding in right-handed healthy humans: a voxel-based statistical analysis of iodine 123 iomazenil SPECT with partial volume correction. AJNR Am J Neuroradiol 2012; 33:1458-63. [PMID: 22403779 DOI: 10.3174/ajnr.a3005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE CBR imaging is highly susceptible to a PVE produced by morphologic changes in the brain related to aging and brain laterality. We assessed the influence of PVE produced by regional age-related changes in gray matter volume on I-123 iomazenil SPECT and elucidated the age-related changes in human CBR binding by using PVE-corrected SPECT images. MATERIALS AND METHODS Nineteen right-handed healthy volunteers (range, 25-82 years; mean, 55 ± 21 years) underwent MR imaging and quantitative I-123 iomazenil SPECT imaging. The influence of age-related changes in rGMC on SPECT images before PVE correction was assessed. PVE correction of the SPECT images was performed by using an MR imaging-based method. Voxel-based linear regression analyses of the PVE-corrected SPECT images were performed by using SPM5. RESULTS The age-related reductions in rGMC and BP without PVE correction revealed a significant direct proportional correlation. Voxel-based statistical analysis with PVE correction showed no significant age-related changes in BP. CONCLUSIONS PVE correction was indispensable for the analysis of I-123 iomazenil SPECT images. PVE-corrected quantitative I-123 iomazenil SPECT images revealed no age-related changes in CBR binding in right-handed healthy humans.
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Affiliation(s)
- H Kato
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan.
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Kato H, Matsuda K, Baba K, Shimosegawa E, Isohashi K, Imaizumi M, Hatazawa J. MR imaging-based correction for partial volume effect improves detectability of intractable epileptogenic foci on iodine 123 iomazenil brain SPECT images: an extended study with a larger sample size. AJNR Am J Neuroradiol 2012; 33:2088-94. [PMID: 22627794 DOI: 10.3174/ajnr.a3121] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE It has been suggested, on the basis of a previous pilot study conducted in a small number of patients, that MR imaging-based PVE correction in I-123 iomazenil brain SPECT improves the detectability of cortical epileptogenic foci. In the present study, we performed an investigation by using a larger sample size to establish the effectiveness of the PVE correction and to conduct a detailed evaluation based on the histologic classification of lesions. MATERIALS AND METHODS Seventy-five patients (male/female, 37/38; age, 28 ± 12 years) with intractable epilepsy who had undergone surgical treatment were enrolled in this study. I-123 iomazenil SPECT and MR imaging examinations were performed before the operation in all patients. I-123 iomazenil SPECT images with and without MR imaging-based PVE correction were assessed visually and by semiquantitative analysis based on the AI(%) of the SPECT count in the resected lesions. RESULTS The sensitivity, specificity, and accuracy of foci detection by visual assessment were significantly higher after PVE correction compared with the values obtained before the correction. The results of the semiquantitative analysis revealed that the asymmetry of the SPECT counts was significantly increased after the PVE correction in the surgically resected lesions in cases of mesial temporal sclerosis, tumor, and malformations of cortical development. CONCLUSIONS The effectiveness of MR imaging-based PVE correction in I-123 iomazenil brain SPECT in improving the detection of cortical epileptogenic foci with abnormal histologic findings was established by our investigation conducted on a large sample size.
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Affiliation(s)
- H Kato
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan.
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Yanagawa M, Tatsumi M, Miyata H, Morii E, Tomiyama N, Watabe T, Isohashi K, Kato H, Shimosegawa E, Yamasaki M, Mori M, Doki Y, Hatazawa J. Evaluation of response to neoadjuvant chemotherapy for esophageal cancer: PET response criteria in solid tumors versus response evaluation criteria in solid tumors. J Nucl Med 2012; 53:872-80. [PMID: 22582049 DOI: 10.2967/jnumed.111.098699] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
UNLABELLED Recently, PET response criteria in solid tumors (PERCIST) have been proposed as a new standardized method to assess chemotherapeutic response metabolically and quantitatively. The aim of this study was to evaluate therapeutic response to neoadjuvant chemotherapy for locally advanced esophageal cancer, comparing PERCIST with the currently widely used response evaluation criteria in solid tumors (RECIST). METHODS Fifty-one patients with locally advanced esophageal cancer who received neoadjuvant chemotherapy (5-fluorouracil, adriamycin, and cisplatin), followed by surgery were studied. Chemotherapeutic lesion responses were evaluated using (18)F-FDG PET and CT according to the RECIST and PERCIST methods. The PET/CT scans were obtained before chemotherapy and about 2 wk after completion of chemotherapy. Associations were statistically analyzed between survival (overall and disease-free survival) and clinicopathologic results (histology [well-, moderately, and poorly differentiated squamous cell carcinoma], lymphatic invasion, venous invasion, clinical stage, pathologic stage, resection level, reduction rate of tumor diameter, reduction rate of tumor uptake, chemotherapeutic responses in RECIST and PERCIST, and pathologic response). RESULTS There was a significant difference in response classification between RECIST and PERCIST (Wilcoxon signed-rank test, P < 0.0001). Univariate analysis showed that lymphatic invasion, venous invasion, resection level, pathologic stage, and PERCIST were significant factors associated with disease-free or overall survival in this study. Although multivariate analysis demonstrated that venous invasion (disease-free survival: hazard ratio [HR] = 4.519, P = 0.002; overall survival: HR = 5.591, P = 0.003) and resection level (disease-free survival: HR = 11.078, P = 0.001) were the significant predictors, PERCIST was also significant in noninvasive therapy response assessment before surgery (disease-free survival: HR = 4.060, P = 0.025; overall survival: HR = 8.953, P = 0.034). CONCLUSION RECIST based on the anatomic size reduction rate did not demonstrate the correlation between therapeutic responses and prognosis in patients with esophageal cancer receiving neoadjuvant chemotherapy. However, PERCIST was found to be the strongest independent predictor of outcomes. Given the significance of noninvasive radiologic imaging in formulating clinical treatment strategies, PERCIST might be considered more suitable for evaluation of chemotherapeutic response to esophageal cancer than RECIST.
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Affiliation(s)
- Masahiro Yanagawa
- Department of Radiology, Osaka University Graduate School of Medicine, Suita-city, Osaka, Japan.
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Chiba Y, Kinoshita M, Okita Y, Tsuboi A, Isohashi K, Kagawa N, Fujimoto Y, Oji Y, Oka Y, Shimosegawa E, Morita S, Hatazawa J, Sugiyama H, Hashimoto N, Yoshimine T. Use of 11C-methionine PET parametric response map for monitoring WT1 immunotherapy response in recurrent malignant glioma. J Neurosurg 2012; 116:835-42. [DOI: 10.3171/2011.12.jns111255] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Object
Immunotherapy targeting the Wilms tumor 1 (WT1) gene product is a promising treatment modality for patients with malignant gliomas, and there have been reports of encouraging results. It has become clear, however, that Gd-enhanced MR imaging does not reflect prognosis, thereby necessitating a more robust imaging evaluation system for monitoring response to WT1 immunotherapy. To meet this demand, the authors performed a voxel-wise parametric response map (PRM) analysis of 11C-methionine PET (MET-PET) in WT1 immunotherapy and compared the data with the overall survival after initiation of WT1 immunotherapy (OSWT1).
Methods
Fourteen patients with recurrent malignant glioma were included in the study, and OSWT1 was compared with: 1) volume and length change in the contrast area of the tumor on Gd-enhanced MR images; 2) change in maximum uptake of 11C-methionine; and 3) a more detailed voxel-wise PRM analysis of MET-PET pre- and post-WT1 immunotherapy.
Results
The PRM analysis was able to identify the following 3 areas within the tumor core: 1) area with no change in 11C-methionine uptake pre- and posttreatment; 2) area with increased 11C-methionine uptake posttreatment (PRM+MET); and 3) area with decreased 11C-methionine uptake posttreatment. While the results of Gd-enhanced MR imaging volumetric and conventional MET-PET analysis did not correlate with OSWT1 (p = 0.270 for Gd-enhanced MR imaging length, p = 0.960 for Gd-enhanced MR imaging volume, and p = 0.110 for MET-PET), the percentage of PRM+MET area showed excellent correlation (p = 0.008) with OSWT1.
Conclusions
This study describes the limited value of Gd-enhanced MR imaging and highlights the potential of voxel-wise PRM analysis of MET-PET for monitoring treatment response in immunotherapy for malignant gliomas. Clinical trial registration no.: UMIN000002001.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Yoshihiro Oka
- 5Respiratory Medicine, Allergy, and Rheumatic Diseases; and
| | | | - Satoshi Morita
- 6Department of Biostatistics and Epidemiology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | | | - Haruo Sugiyama
- 7Functional Diagnostic Science, Osaka University Graduate School of Medicine, Osaka; and
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Mabuchi S, Morimoto A, Fujita M, Isohashi K, Kimura T. G-CSF induces focal intense bone marrow FDG uptake mimicking multiple bone metastases from uterine cervical cancer: a case report and review of the literature. EUR J GYNAECOL ONCOL 2012; 33:316-317. [PMID: 22873109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We describe a case of FIGO Stage IB2 uterine cervical cancer which showed focal intense bone marrow FDG uptake mimicking bone metastases after the administration of G-CSF This case highlights the importance of avoiding the administration of G-CSF prior to PET imaging.
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Affiliation(s)
- S Mabuchi
- Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Osaka, Japan.
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Isohashi K, Tatsumi M, Higuchi I, Inoue A, Nakajo K, Ishikawa J, Shimosegawa E, Kanakura Y, Nakamura H, Hatazawa J. 18F-FDG-PET in patients with malignant lymphoma having long-term follow-up: staging and restaging, and evaluation of treatment response and recurrence. Ann Nucl Med 2008; 22:795-802. [PMID: 19039558 DOI: 10.1007/s12149-008-0186-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2008] [Accepted: 06/13/2008] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate the diagnostic accuracy of positron emission tomography (PET) with 2-[18F]fluoro-2-deoxy-D-glucose (18F-FDG) for staging/restaging, evaluating the treatment response, and screening of recurrence in patients with malignant lymphoma (ML) during long-term follow-up, and to compare that with computer tomography (CT)/magnetic resonance imaging (MRI). METHODS The study was conducted in 59 ML patients who underwent whole-body 18F-FDG-PET examinations three times or more from October 1998 to August 2006. The location of the lesions in the patients with positive findings on 18F-FDG-PET and/or the corresponding CT/MRI was classified into supradiaphragmatic (n = 10), infradiaphragmatic (n = 7), and extranodal sites (n = 20), and the findings were compared on a site basis according to the gold standard, which consisted of all clinical information available, including follow-up results. RESULTS A total of 156 18F-FDG-PET examinations for which the corresponding CT/MRI images were also available were evaluated, and a total of 305 sites showed positive findings on 18F-FDG-PET and/or CT/MRI. Concordant positive findings were obtained in 76% for staging/restaging, 34% for evaluation of the treatment response, and 50% for screening of recurrence. The accuracy of 18F-FDG-PET versus CT/MRI was 92% versus 84% (P = 0.06) for staging/restaging, 84% versus 50% (P < 0.05) for the evaluation of the treatment response, and 83% versus 72% (P = 0.21) for the screening of recurrence. At pathologic sites with discrepant findings between 18F-FDG-PET and CT/MRI (n = 122), the frequency of accurate diagnosis by 18F-FDG-PET (76%) was higher than that by CT/MRI (24%), especially for the evaluation of the treatment response. CONCLUSIONS 18F-FDG-PET is expected to play a significant role in the management of ML patients even after effective treatment is initiated.
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Affiliation(s)
- Kayako Isohashi
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
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Konishi K, Kuriyama K, Chino S, Isohashi K, Murata M, Tsuda K, Mitani T, Maeda M, Kadota T, Arisawa J. [CT evaluation of response to chemotherapy and/or radiotherapy in primary lung cancer: comparison of response evaluation criteria in solid tumors (RECIST) and the WHO criteria, and comparison of both methods with the histological evaluation]. Nihon Igaku Hoshasen Gakkai Zasshi 2004; 64:41-5. [PMID: 14994510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
PURPOSE The new RECIST criteria for evaluation of tumor response to chemotherapy and/or radiotherapy were proposed in 1999. We compared RECIST with the WHO criteria and also compared both methods with the histological findings, to evaluate RECIST. SUBJECTS AND METHODS The subjects were 32 primary lung cancer patients operated on after chemotherapy and/or radiotherapy. Two radiologists measured the diameter of the tumors and compared the RECIST and WHO criteria using the McNemar test. We also compared both criteria with the histological results. RESULTS Using RECIST, partial response (PR) was assessed in 12 cases, stable disease (SD) in 18, and progressive disease (PD) in 2. With the WHO criteria, PR was seen in 15, no change (NC) in 15, and PD in 2. The two evaluations corresponded in 29 of 32 cases, and the p-value was 0.2500. Ef.1b-2 (good histological effect) was much higher in PR, and to evaluate the size of the tumors was useful, although more than half of SD was Ef.1b-2. CONCLUSION RECIST criteria corresponded almost perfectly with the WHO criteria, suggesting that RECIST is accurate and useful.
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Affiliation(s)
- Koji Konishi
- Department of Diagnostic Radiology, Osaka Medical Center for Cancer and Cardiovascular Diseases
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Chino S, Kuriyama K, Isohashi K, Murata M, Mitani H, Tsuda K, Maeda M, Kadota T, Arisawa J. [Percutaneous localization of pulmonary nodules with CT guidance for lung resection: use of dyes]. Nihon Igaku Hoshasen Gakkai Zasshi 2003; 63:308-10. [PMID: 12934548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
OBJECTIVE The purpose of this study was to assess the benefits of computed tomography(CT)-guided marking using dyes in patients undergoing lung resection for peripheral nodules. METHODS Between January 1997 and August 2002, the location of small pulmonary nodules was identified with the aid of CT-guided marking in 52 patients scheduled for surgery. Dye-injection was performed in 52 patients (indigo carmine, n = 15; indocyanine green, n = 37). The average nodule size was 9.2 mm (range, 3 to 18 mm). RESULTS The procedure using dyes proved to be easy and safe: the dyes were easily injected near the nodules, and no serious complications ensued. Intraoperatively, indocyanine was superior to indigo carmine with respect to visualization of the dyed pleural surface. CONCLUSION The preoperative CT-guided injection of indocyanine green proved to be the most useful and safest technique for identifying peripheral pulmonary nodules in patients scheduled for thoracoscopic surgery or minimal thoracotomy.
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Affiliation(s)
- Shuji Chino
- Department of Diagnostic Radiology, Osaka Medical Center for Cancer and Cardiovascular Disease
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