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Kanzaki T, Takahashi Y, Higuchi T, Zhang X, Mogi N, Suto T, Tsushima Y. Evaluation of a Correction Method for 111In-Pentetreotide SPECT Imaging of Gastroenteropancreatic Neuroendocrine Tumors. J Nucl Med Technol 2020; 48:326-330. [PMID: 32887762 DOI: 10.2967/jnmt.120.249680] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 06/26/2020] [Indexed: 11/16/2022] Open
Abstract
The number of patients with the extremely rare disease gastroenteropancreatic (GEP) neuroendocrine tumor (NET) has increased rapidly in recent years. 111In-pentetreotide SPECT in somatostatin receptor scintigraphy has been used for the assessment of GEP NET patients. To diagnose GEP NET, appropriate selection of image correction parameters is critical. Correction methods may improve the 111In-pentetreotide SPECT image quality, but there is currently no standard technique. The purpose of this study was to determine the optimal correction parameter settings for 111In-pentetreotide SPECT. Methods: A phantom study produced images with a tumor-to-background ratio of as high as 16:1. A triple energy window was used for scatter correction (SC), and attenuation correction (AC) was CT-based. Correlation analysis was performed in 4 groups: no correction (NC), SC, AC, and combined SC with AC (CC). The 111In-pentetreotide SPECT results for 20 randomly selected patients (13 men and 7 women; age range, 37-81 y) with confirmed GEP NET were analyzed using data collected 4 h after injection of 111 MBq of 111In-pentetreotide. Emission data were reconstructed using ordered-subset expectation maximization (OSEM) with different settings. Different combinations of the correction parameters were used to analyze the contrast-to-noise ratios (CNRs) obtained with the phantom. In the clinical study, 20 GEP NET patients were used to evaluate the GEP NET lesion CNR by 4 different image correction methods obtained from 111In-pentetreotide SPECT images: NC, SC, AC, and CC. NC was used as a reference method. Results: The phantom study revealed that the optimal energy window in the photopeak for somatostatin receptor scintigraphy was 171 keV ± 10% and 245 keV ± 7.5%, and the optimal OSEM reconstruction conditions were 8 subsets and 6 iterations. Among the OSEM collection conditions, CC produced a significantly higher CNR than NC or SC (P < 0.05). In the clinical study, CC was found to increase the CNR (P < 0.05). Conclusion: CC improves the correction in 111In-pentetreotide SPECT studies, compared with NC, providing better contrast and sharper outlines of lesions and organs.
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Affiliation(s)
- Takao Kanzaki
- Department of Radiology, Gunma University Hospital, Gunma, Japan .,Department of Nuclear Medicine Technology, Hirosaki University Graduate School of Health Sciences, Aomori, Japan
| | - Yasuyuki Takahashi
- Department of Nuclear Medicine Technology, Hirosaki University Graduate School of Health Sciences, Aomori, Japan
| | - Tetsuya Higuchi
- Department of Diagnostic Radiology and Nuclear Medicine, Gunma University Graduate School of Medicine, Gunma, Japan; and
| | - Xieyi Zhang
- Laboratory of Biopharmaceutics, Department of Pharmacology, Faculty of Pharmacy, Takasaki University of Health and Welfare, Gunma, Japan
| | - Nao Mogi
- Department of Radiology, Gunma University Hospital, Gunma, Japan
| | - Takayuki Suto
- Department of Radiology, Gunma University Hospital, Gunma, Japan
| | - Yoshito Tsushima
- Department of Diagnostic Radiology and Nuclear Medicine, Gunma University Graduate School of Medicine, Gunma, Japan; and
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Yolcu YU, Lehman VT, Bhatti AUR, Goyal A, Alvi MA, Bydon M. Use of Hybrid Imaging Techniques in Diagnosis of Facet Joint Arthropathy: A Narrative Review of Three Modalities. World Neurosurg 2019; 134:201-210. [PMID: 31655232 DOI: 10.1016/j.wneu.2019.10.082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 10/10/2019] [Accepted: 10/11/2019] [Indexed: 11/18/2022]
Abstract
Facet joint osteoarthritis/arthropathy of the spine is a common cause of back and neck pain that frequently overlaps clinically with other diseases of the spine. Because of the possible overlap, it is crucial to have an accurate diagnostic strategy, especially when determining the management approach. Various strategies have been suggested and adopted, with several these still being used in clinics. Over the years, because of the disadvantages of single-modality imaging methods (computed tomography, magnetic resonance imaging, single-photon emission computed tomography), the interest in radiologic examination started to move toward hybrid imaging techniques. Although the data are mixed, many initial studies have shown promise. However, there are relatively few data with comparative medial branch blocks, and further investigation is needed. Given the advantages and disadvantages of these new techniques, the imaging results have to be interpreted within clinical context and with consideration of the current state of knowledge in the decision-making process.
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Affiliation(s)
- Yagiz Ugur Yolcu
- Mayo Clinic Neuro-Informatics Laboratory, Department of Neurologic, Mayo Clinic, Rochester, Minnesota, USA; Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Vance T Lehman
- Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
| | - Atiq Ur Rehman Bhatti
- Mayo Clinic Neuro-Informatics Laboratory, Department of Neurologic, Mayo Clinic, Rochester, Minnesota, USA; Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Anshit Goyal
- Mayo Clinic Neuro-Informatics Laboratory, Department of Neurologic, Mayo Clinic, Rochester, Minnesota, USA; Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Mohammed Ali Alvi
- Mayo Clinic Neuro-Informatics Laboratory, Department of Neurologic, Mayo Clinic, Rochester, Minnesota, USA; Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Mohamad Bydon
- Mayo Clinic Neuro-Informatics Laboratory, Department of Neurologic, Mayo Clinic, Rochester, Minnesota, USA; Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA.
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Wong K, Chondrogiannis S, Fuster D, Ruiz C, Marzola M, Giammarile F, Colletti P, Rubello D. Additional value of hybrid SPECT/CT systems in neuroendocrine tumors, adrenal tumors, pheochromocytomas and paragangliomas. Rev Esp Med Nucl Imagen Mol 2017. [DOI: 10.1016/j.remnie.2016.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Wong KK, Chondrogiannis S, Fuster D, Ruiz C, Marzola MC, Giammarile F, Colletti PM, Rubello D. Additional value of hybrid SPECT/CT systems in neuroendocrine tumors, adrenal tumors, pheochromocytomas and paragangliomas. Rev Esp Med Nucl Imagen Mol 2016; 36:103-109. [PMID: 27793631 DOI: 10.1016/j.remn.2016.09.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 09/15/2016] [Accepted: 09/15/2016] [Indexed: 10/20/2022]
Abstract
The aim of this review was to evaluate the potential advantages of SPECT/CT hybrid imaging in the management of neuroendocrine tumors, adrenal tumors, pheochromocytomas and paragangliomas. From the collected data, the superiority of fused images was observed as providing both functional/molecular and morphological imaging compared to planar imaging. This provided an improvement in diagnostic imaging, with significant advantages as regards: (1) precise locating of the lesions; (2) an improvement in characterization of the findings, resulting higher specificity, improved sensitivity, and overall greater accuracy, (3) additional anatomical information derived from the CT component; (4) CT-based attenuation correction and potential for volumetric dosimetry calculations, and (5) improvement on the impact on patient management (e.g. in better defining treatment plans, in shortening surgical operating times). It can be concluded that SPECT/CT hybrid imaging provides the nuclear medicine physician with a powerful imaging modality in comparison to planar imaging, providing essential information about the location of lesions, and high quality homogeneous images.
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Affiliation(s)
- K K Wong
- Division of Nuclear Medicine, Department of Radiology, University of Michigan, Ann Arbor, MI, USA; Nuclear Medicine Service, VA Ann Arbor Healthcare System, Ann Arbor, MI, USA
| | - S Chondrogiannis
- Department of Nuclear Medicine, Radiology, NeuroRadiology, Medical Physics, Clinical Laboratory, Molecular Laboratory, Microbiology, Pathology, Santa Maria della Misericordia Hospital, Rovigo, Italy
| | - D Fuster
- Department of Nuclear Medicine, Hospital Clínic, Barcelona, Spain
| | - C Ruiz
- Department of Nuclear Medicine, Hospital Clínic, Barcelona, Spain
| | - M C Marzola
- Department of Nuclear Medicine, Radiology, NeuroRadiology, Medical Physics, Clinical Laboratory, Molecular Laboratory, Microbiology, Pathology, Santa Maria della Misericordia Hospital, Rovigo, Italy
| | - F Giammarile
- Nuclear Medicine Department, University of Lyon, Lyon, France
| | - P M Colletti
- Department of Nuclear Medicine, University of Southern California, Los Angeles, CA, USA
| | - D Rubello
- Department of Nuclear Medicine, Radiology, NeuroRadiology, Medical Physics, Clinical Laboratory, Molecular Laboratory, Microbiology, Pathology, Santa Maria della Misericordia Hospital, Rovigo, Italy.
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Wong KK, Gandhi A, Viglianti BL, Fig LM, Rubello D, Gross MD. Endocrine radionuclide scintigraphy with fusion single photon emission computed tomography/computed tomography. World J Radiol 2016; 8:635-655. [PMID: 27358692 PMCID: PMC4919764 DOI: 10.4329/wjr.v8.i6.635] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 11/09/2015] [Accepted: 03/18/2016] [Indexed: 02/06/2023] Open
Abstract
AIM: To review the benefits of single photon emission computed tomography (SPECT)/computed tomography (CT) hybrid imaging for diagnosis of various endocrine disorders.
METHODS: We performed MEDLINE and PubMed searches using the terms: “SPECT/CT”; “functional anatomic mapping”; “transmission emission tomography”; “parathyroid adenoma”; “thyroid cancer”; “neuroendocrine tumor”; “adrenal”; “pheochromocytoma”; “paraganglioma”; in order to identify relevant articles published in English during the years 2003 to 2015. Reference lists from the articles were reviewed to identify additional pertinent articles. Retrieved manuscripts (case reports, reviews, meta-analyses and abstracts) concerning the application of SPECT/CT to endocrine imaging were analyzed to provide a descriptive synthesis of the utility of this technology.
RESULTS: The emergence of hybrid SPECT/CT camera technology now allows simultaneous acquisition of combined multi-modality imaging, with seamless fusion of three-dimensional volume datasets. The usefulness of combining functional information to depict the bio-distribution of radiotracers that map cellular processes of the endocrine system and tumors of endocrine origin, with anatomy derived from CT, has improved the diagnostic capability of scintigraphy for a range of disorders of endocrine gland function. The literature describes benefits of SPECT/CT for 99mTc-sestamibi parathyroid scintigraphy and 99mTc-pertechnetate thyroid scintigraphy, 123I- or 131I-radioiodine for staging of differentiated thyroid carcinoma, 111In- and 99mTc- labeled somatostatin receptor analogues for detection of neuroendocrine tumors, 131I-norcholesterol (NP-59) scans for assessment of adrenal cortical hyperfunction, and 123I- or 131I-metaiodobenzylguanidine imaging for evaluation of pheochromocytoma and paraganglioma.
CONCLUSION: SPECT/CT exploits the synergism between the functional information from radiopharmaceutical imaging and anatomy from CT, translating to improved diagnostic accuracy and meaningful impact on patient care.
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Niederle B, Pape UF, Costa F, Gross D, Kelestimur F, Knigge U, Öberg K, Pavel M, Perren A, Toumpanakis C, O'Connor J, O'Toole D, Krenning E, Reed N, Kianmanesh R. ENETS Consensus Guidelines Update for Neuroendocrine Neoplasms of the Jejunum and Ileum. Neuroendocrinology 2016; 103:125-38. [PMID: 26758972 DOI: 10.1159/000443170] [Citation(s) in RCA: 291] [Impact Index Per Article: 36.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- B Niederle
- Department of Surgery, Medical University of Vienna, Vienna, Austria
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Contribution of ¹¹¹In-pentetreotide SPECT/CT imaging to conventional somatostatin receptor scintigraphy in the detection of neuroendocrine tumours. Nucl Med Commun 2015; 36:251-9. [PMID: 25369750 DOI: 10.1097/mnm.0000000000000239] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
AIM The aim of the study was to assess the contribution of 111In-pentetreotide single-photon emission computed tomography/computed tomography (SPECT/CT) imaging to conventional somatostatin receptor scintigraphy (SRS) in terms of lesion characterization and localization in the detection of neuroendocrine tumours (NETs). MATERIALS AND METHODS A total of 107 patients with suspected or confirmed NET underwent SRS and SPECT/CT after the injection of 148-222 MBq of 111In-pentetreotide. SRS and SPECT/CT images were interpreted independently. Each site of abnormal tracer uptake was recorded according to the anatomical localization, and as being consistent or not with NET. The findings were confirmed with pathological and/or clinical/imaging follow-up data. RESULTS A final diagnosis of NET was achieved in 49/107 patients (45.8%). No evidence of NET was found in the rest. SPECT/CT resulted in a significant reduction of indeterminate cases [14/107 (13.1%) vs. 1/107 (0.9%); P<0.001] and correctly reclassified one patient as negative for NET and another as positive for NET. SPECT/CT had 87.8% sensitivity and 96.6% specificity on a patient-based analysis, statistically higher than SRS (P<0.001). A total of 160 foci were detected (108 NETs and 52 physiological/benign tumours). SRS correctly classified 105/160 foci (65.6%) and remained inaccurate for 55 lesions. These 55 included 31 indeterminate lesions, 12 lesions detected only by SPECT/CT and 12 false-positive lesions. The number of foci correctly classified on the SPECT/CT images was 151/160 (94.4%), whereas two remained indeterminate and seven were false-positive findings. CONCLUSION SPECT/CT provides incremental diagnostic value over SRS, mainly because of a precise anatomical localization that helps discriminate between tumour lesions and physiological uptake. SPECT/CT may detect unsuspected lesions in a small proportion of patients.
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Wong KK, Fig LM, Youssef E, Ferretti A, Rubello D, Gross MD. Endocrine scintigraphy with hybrid SPECT/CT. Endocr Rev 2014; 35:717-46. [PMID: 24977318 DOI: 10.1210/er.2013-1030] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Nuclear medicine imaging of endocrine disorders takes advantage of unique cellular properties of endocrine organs and tissues that can be depicted by targeted radiopharmaceuticals. Detailed functional maps of biodistributions of radiopharmaceutical uptake can be displayed in three-dimensional tomographic formats, using single photon emission computed tomography (CT) that can now be directly combined with simultaneously acquired cross-sectional anatomic maps derived from CT. The integration of function depicted by scintigraphy and anatomy with CT has synergistically improved the efficacy of nuclear medicine imaging across a broad spectrum of clinical applications, which include some of the oldest imaging studies of endocrine dysfunction.
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Affiliation(s)
- Ka Kit Wong
- Nuclear Medicine/Radiology Department (K.K.W., E.Y., M.D.G.), University of Michigan Hospital, Ann Arbor, Michigan 48109; Nuclear Medicine Service (K.K.W., L.M.F., M.D.G.), Department of Veterans Affairs Health System, Ann Arbor, Michigan 48105; and Department of Nuclear Medicine (A.F., D.R.), Radiology, Medical Physics, Santa Maria della Misericordia Hospital, 45100 Rovigo, Italy
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Contribution of SPECT/CT to the diagnosis of a pancreatic tail tumor in a case of multiple endocrine neoplasia type 1. Clin Nucl Med 2012; 37:301-3. [PMID: 22310264 DOI: 10.1097/rlu.0b013e31824440df] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Wong KK, Waterfield RT, Marzola MC, Scarsbrook AF, Chowdhury FU, Gross MD, Rubello D. Contemporary nuclear medicine imaging of neuroendocrine tumours. Clin Radiol 2012; 67:1035-50. [PMID: 22633086 DOI: 10.1016/j.crad.2012.03.019] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Revised: 03/02/2012] [Accepted: 03/12/2012] [Indexed: 12/31/2022]
Abstract
Neuroendocrine tumours (NETs) are rare, heterogeneous, and often hormonally active neoplasms. Nuclear medicine (NM) imaging using single photon- and positron-emitting radiopharmaceuticals allows sensitive and highly specific molecular imaging of NETs, complementary to anatomy-based techniques, such as computed tomography (CT) and magnetic resonance imaging (MRI). Somatostatin-receptor scintigraphy is a whole-body imaging technique widely used for diagnosis, staging and restaging of NETs. The increasing availability of hybrid single-photon emission CT (SPECT)/CT cameras now offers superior accuracy for localization and functional characterization of NETs compared to traditional planar and SPECT imaging. The potential role of positron-emission tomography (PET) tracers in the functional imaging of NETs is also being increasingly recognized. In addition to 2-[(18)F]-fluoro-2-deoxy-d-glucose (FDG), newer positron-emitting radiopharmaceuticals such as (18)F-dihydroxyphenylalanine (DOPA) and (68)Ga-1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA) peptides, show promise for the future. This article will summarize the role of current and emerging radiopharmaceuticals in NM imaging of this rare but important group of tumours.
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Affiliation(s)
- K K Wong
- Nuclear Medicine, Radiology Department, University of Michigan Hospital, Ann Arbor, MI, USA.
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Pepe G, Moncayo R, Bombardieri E, Chiti A. Somatostatin receptor SPECT. Eur J Nucl Med Mol Imaging 2012; 39 Suppl 1:S41-51. [DOI: 10.1007/s00259-011-2019-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Pape UF, Perren A, Niederle B, Gross D, Gress T, Costa F, Arnold R, Denecke T, Plöckinger U, Salazar R, Grossman A. ENETS Consensus Guidelines for the management of patients with neuroendocrine neoplasms from the jejuno-ileum and the appendix including goblet cell carcinomas. Neuroendocrinology 2012; 95:135-56. [PMID: 22262080 DOI: 10.1159/000335629] [Citation(s) in RCA: 269] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ulrich-Frank Pape
- Division of Hepatology and Gastroenterology, Department of Internal Medicine, Campus Virchow-Klinikum, Berlin, Germany.
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Comparison of single time-point [111-In] pentetreotide SPECT/CT with dual time-point imaging of neuroendocrine tumors. Clin Nucl Med 2011; 36:25-31. [PMID: 21157203 DOI: 10.1097/rlu.0b013e3181feedc0] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
PURPOSE to determine whether single time-point single-photon emission computed tomography-computed tomography (SPECT/CT) somatostatin receptor imaging can replace traditional dual time-point planar and SPECT somatostatin receptor scintigraphy for evaluation of neuroendocrine tumors. MATERIALS AND METHODS twenty-four patients (9 males, 15 females; mean age: 56 years; range: 14-82 years) underwent [111-In] pentetreotide scintigraphy, with planar whole-body images acquired at 24 and 48 hours after injection and abdominal SPECT/CT at 24 hours postinjection. Two blinded readers independently interpreted each study, using single time-point (24 hours planar and SPECT/CT) and separately using dual time-point (24- and 48-hours planar, and 24-hour SPECT without CT) image information. Consensus interpretations were compared with surgical pathology, or clinical and radiologic follow-up for at least 12 months. RESULTS Interobserver agreement was excellent (κ = 0.86) for single time-point imaging, and good (κ = 0.56) with dual time-point imaging. After consensus review, single time-point imaging identified pathologic lesions in 11 of 12 subjects with diagnosis of NET at follow-up, and in 0 of 12 subjects without NET (sensitivity 92%; specificity 100%). Dual time-point imaging performed similarly, but missed an additional NET case (sensitivity 83%; specificity 100%). After review of SPECT/CT, the readers considered that additional 48 hours imaging was not necessary in the majority of cases, indicating high degree of confidence with the single time-point imaging. CONCLUSION [111-In] pentetreotide SPECT/CT imaging at 24 hours identifies pathologic disease sites and distinguishes physiologic activity equally well compared to traditional strategies using 2 imaging days. Routine use of SPECT/CT will allow single time-point imaging without loss of diagnostic accuracy, enhancing patient convenience, and clinical throughput.
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Even-Sapir E, Keidar Z, Bar-Shalom R. Hybrid imaging (SPECT/CT and PET/CT)--improving the diagnostic accuracy of functional/metabolic and anatomic imaging. Semin Nucl Med 2010; 39:264-75. [PMID: 19497403 DOI: 10.1053/j.semnuclmed.2009.03.004] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In-line combined systems, single-photon emission computed tomography (SPECT)/computed tomography (CT) and positron emission tomography (PET)/CT, allow an instant generation of fused images of scintigraphy and CT data. The accumulated clinical data on the use of these systems in various clinical scenarios indicate that this hybrid technology improves the diagnostic accuracy as compared to scintigraphy and CT alone and even to side-by-side interpretation of scintigraphy and CT, which were acquired separately. The improved diagnostic accuracy is reflected by improving image quality of SPECT and PET, detection of more clinically relevant lesions, better localization of disease and differentiation between physiologic and pathologic uptake, characterization of disease by its functional and morphologic appearance before and after therapy and accurate delineation of disease, optimizing biopsy and therapy planning.
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Affiliation(s)
- Einat Even-Sapir
- Department of Nuclear Medicine, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.
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Development and evaluation of QSPECT open-source software for the iterative reconstruction of SPECT images. Nucl Med Commun 2010; 31:558-66. [DOI: 10.1097/mnm.0b013e32833841e8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Attenuation correction of somatostatin receptor SPECT by integrated low-dose CT: is there an impact on sensitivity? Clin Nucl Med 2010; 34:869-73. [PMID: 20139819 DOI: 10.1097/rlu.0b013e3181becfcb] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
AIM Somatostatin receptor scintigraphy (SRS) is an established imaging modality for neuroendocrine tumors (NET). Additional single photon emission computed tomography (SPECT-CT) not only permits image fusion but also attenuation correction (AC) of SPECT data. This study evaluated whether attenuation corrected SPECT-images (SPECT[AC]) are more sensitive than nonattenuation corrected SPECT-reconstructions (SPECT[NAC]) for the detection of NET lesions. METHODS The imaging data (planar In-111-octreotide scintigraphy and SPECT-CT) of 50 consecutive patients (28 male; 22 female; age, 34-80; mean, 65 years) with NET were included in this retrospective analysis. SPECT data were reconstructed with and without integrated CT-based AC and then analyzed by 2 experienced readers for the presence of pathologic uptake in a blinded consensus reading. Fused SPECT-CT, contemporary CT/MRI, and clinical as well as imaging follow-up served as a reference standard. All foci were rated in both the SPECT(NAC)- and SPECT(AC)-reconstructions for intensity and contrast using a 6-point-score ("0 = no uptake/no delineation from surrounding tissue" to "5 = very high uptake/very strong delineation from surrounding tissue"). The scores were analyzed in a 6 x 6 contingency table using the McNemar Bowker test. RESULTS A total of 222 pathologic foci were detected by SPECT(NAC) and 227 foci by SPECT(AC), respectively. In 67 of 227 foci (29.5%), focus intensity/contrast increased after AC, whereas only 5 foci showed a decrease (P < 0.001). Sensitivity increased by 2.2% (P = 0.025; 95% CI: 0.02%-4.1%) as 5 foci were detected only by SPECT(AC). However, as these 3 patients were already diagnosed with systemic disease, there was no influence on the therapeutic strategy chosen. CONCLUSION Attenuation correction of somatostatin receptor scintigraphy-SPECT significantly improves focus visualization and, albeit slightly, also significantly increases sensitivity.
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Wong KK, Cahill JM, Frey KA, Avram AM. Incremental value of 111-in pentetreotide SPECT/CT fusion imaging of neuroendocrine tumors. Acad Radiol 2010; 17:291-7. [PMID: 19962915 DOI: 10.1016/j.acra.2009.08.015] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2009] [Revised: 08/27/2009] [Accepted: 08/27/2009] [Indexed: 01/01/2023]
Abstract
RATIONALE AND OBJECTIVES Hybrid single photon-emission computed tomographic (SPECT) and computed tomographic (CT) imaging for the investigation of neuroendocrine tumors allows the fusion of functional and anatomic information in a rapid and efficient method. The aim of this study was to assess the incremental diagnostic value of (111)In pentetreotide SPECT/CT imaging compared with traditional planar and SPECT imaging with respect to lesion localization and characterization and reader confidence. MATERIALS AND METHODS Forty-nine patients (23 male, 26 female; mean age, 56.9 years; range, 14-88 years) who underwent (111)In pentetreotide planar, SPECT, and SPECT/CT imaging were eligible for this retrospective study, including patients with suspected or confirmed carcinoid tumors (n = 24), endocrine pancreatic tumors (n = 18), medullary thyroid cancer (n = 3), paragangliomas (n = 2), and multiple endocrine neoplasia type I (n = 2). Planar and SPECT images were reviewed by two blinded readers, followed by interpretation using additional SPECT/CT images in a subsequent session. A third reader provided consensus in cases with disagreements. RESULTS In 55 of 89 lesions (61.8%), (111)In pentetreotide SPECT/CT imaging improved lesion localization compared to planar and SPECT imaging; in 25 of 89 lesions (28.1%), SPECT/CT imaging changed lesion classification. In 20 of 49 patients (40.8%) for reader 1 and 14 of 49 patients (28.6%) for reader 2, (111)In pentetreotide SPECT/CT imaging provided incremental diagnostic value, which was considered likely to affect patient management in twelve of 20 and seven of 14 patients, respectively. Increased reader confidence was found in 32 of 49 patients (65.3%) for both readers with uniformly high confidence after SPECT/CT interpretation. CONCLUSIONS Hybrid (111)In pentetreotide SPECT/CT imaging provides incremental diagnostic value and greater reader confidence over planar and SPECT imaging. This is achieved though superior lesion localization, the identification of physiologic activity, and additional anatomic information derived from the nondiagnostic CT portion of the study.
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Impact of 111In-DTPA-octreotide SPECT/CT fusion images in the management of neuroendocrine tumours. Radiol Med 2008; 113:1056-67. [PMID: 18797822 DOI: 10.1007/s11547-008-0319-9] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2007] [Accepted: 02/19/2008] [Indexed: 12/31/2022]
Abstract
PURPOSE Somatostatin receptor scintigraphy with [(111)In]-diethylene triamine pentaacetate acid (DTPA)-octreotide is an accurate method for detecting neuroendocrine tumours (NETs) but often does not provide clear anatomical localisation of lesions. The aim of this study was to assess the clinical usefulness of anatomical-functional image fusion. MATERIALS AND METHODS Fifty-four patients with known or suspected NET were included in the study. Planar and single-photon-emission computed tomography (SPECT) imaging was performed using a dual-head gamma camera equipped with an integrated X-ray transmission system, and the images were first interpreted alone by two nuclear medicine physicians and then compared with SPECT/CT fusion images together with a radiologist. The improvement provided by SPECT/CT in the interpretation of SPECT data alone and any modification in patient management were recorded. RESULTS Fusion images improved SPECT interpretation in 23 cases, providing precise anatomical localisation of increased tracer uptake in 20 cases and disease exclusion in sites of physiological uptake in 5. In 10 patients, SPECT/CT allowed definition of the functional significance of lesions detected by diagnostic CT. SPECT/CT data modified clinical management in 14 cases by changing the diagnostic approach in 8 and the therapeutic modality in 6. CONCLUSIONS Our study demonstrates that image fusion is clearly superior to SPECT alone, allowing precise localisation of lesions and reducing false-positive results.
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Seo Y, Mari C, Hasegawa BH. Technological development and advances in single-photon emission computed tomography/computed tomography. Semin Nucl Med 2008; 38:177-98. [PMID: 18396178 DOI: 10.1053/j.semnuclmed.2008.01.001] [Citation(s) in RCA: 139] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Single-photon emission computed tomography/computed tomography (SPECT/CT) has emerged during the past decade as a means of correlating anatomical information from CT with functional information from SPECT. The integration of SPECT and CT in a single imaging device facilitates anatomical localization of the radiopharmaceutical to differentiate physiological uptake from that associated with disease and patient-specific attenuation correction to improve the visual quality and quantitative accuracy of the SPECT image. The first clinically available SPECT/CT systems performed emission-transmission imaging using a dual-headed SPECT camera and a low-power x-ray CT subsystem. Newer SPECT/CT systems are available with high-power CT subsystems suitable for detailed anatomical diagnosis, including CT coronary angiography and coronary calcification that can be correlated with myocardial perfusion measurements. The high-performance CT capabilities also offer the potential to improve compensation of partial volume errors for more accurate quantitation of radionuclide measurement of myocardial blood flow and other physiological processes and for radiation dosimetry for radionuclide therapy. In addition, new SPECT technologies are being developed that significantly improve the detection efficiency and spatial resolution for radionuclide imaging of small organs including the heart, brain, and breast, and therefore may provide new capabilities for SPECT/CT imaging in these important clinical applications.
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Affiliation(s)
- Youngho Seo
- Department of Radiology, University of California, San Francisco, San Francisco, CA, USA
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