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Kaushik D, Jangra P, Verma R, Purohit D, Pandey P, Sharma S, Sharma RK. Radiopharmaceuticals: An insight into the latest advances in medical uses and regulatory perspectives. J Biosci 2021. [DOI: 10.1007/s12038-021-00147-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Laudicella R, Bauckneht M, Cuppari L, Donegani MI, Arnone A, Baldari S, Burger IA, Quartuccio N. Emerging applications of imaging in glioma: focus on PET/MRI and radiomics. Clin Transl Imaging 2021. [DOI: 10.1007/s40336-021-00464-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Liberini V, Messerli M, Husmann L, Kudura K, Grünig H, Maurer A, Skawran S, Orita E, Pizzuto DA, Deandreis D, Dummer R, Mangana J, Mihic-Probst D, Rupp N, Huellner MW. Improved detection of in-transit metastases of malignant melanoma with BSREM reconstruction in digital [ 18F]FDG PET/CT. Eur Radiol 2021; 31:8011-8020. [PMID: 33768288 PMCID: PMC8452544 DOI: 10.1007/s00330-021-07852-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 03/01/2021] [Accepted: 03/04/2021] [Indexed: 11/26/2022]
Abstract
OBJECTIVES To compare block sequential regularized expectation maximization (BSREM) and ordered subset expectation maximization (OSEM) for the detection of in-transit metastasis (ITM) of malignant melanoma in digital [18F]FDG PET/CT. METHODS We retrospectively analyzed a cohort of 100 [18F]FDG PET/CT scans of melanoma patients with ITM, performed between May 2017 and January 2020. PET images were reconstructed with both OSEM and BSREM algorithms. SUVmax, target-to-background ratio (TBR), and metabolic tumor volume (MTV) were recorded for each ITM. Differences in PET parameters were analyzed with the Wilcoxon signed-rank test. Differences in image quality for different reconstructions were tested using the Man-Whitney U test. RESULTS BSREM reconstruction led to the detection of 287 ITM (39% more than OSEM). PET parameters of ITM were significantly different between BSREM and OSEM reconstructions (p < 0.001). SUVmax and TBR were higher (76.5% and 77.7%, respectively) and MTV lower (49.5%) on BSREM. ITM missed with OSEM had significantly lower SUVmax (mean 2.03 vs. 3.84) and TBR (mean 1.18 vs. 2.22) and higher MTV (mean 2.92 vs. 1.01) on OSEM compared to BSREM (all p < 0.001). CONCLUSIONS BSREM detects significantly more ITM than OSEM, owing to higher SUVmax, higher TBR, and less blurring. BSREM is particularly helpful in small and less avid lesions, which are more often missed with OSEM. KEY POINTS • In melanoma patients, [18F]FDG PET/CT helps to detect in-transit metastases (ITM), and their detection is improved by using BSREM instead of OSEM reconstruction. • BSREM is particularly useful in small lesions.
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Affiliation(s)
- Virginia Liberini
- Department of Nuclear Medicine, University Hospital Zürich, University of Zürich, Rämistrasse 100, CH-8091, Zürich, Switzerland.
- Department of Nuclear Medicine, Città della Salute e della Scienza di Torino, University of Turin, Turin, Italy.
| | - Michael Messerli
- Department of Nuclear Medicine, University Hospital Zürich, University of Zürich, Rämistrasse 100, CH-8091, Zürich, Switzerland
| | - Lars Husmann
- Department of Nuclear Medicine, University Hospital Zürich, University of Zürich, Rämistrasse 100, CH-8091, Zürich, Switzerland
| | - Ken Kudura
- Department of Nuclear Medicine, University Hospital Zürich, University of Zürich, Rämistrasse 100, CH-8091, Zürich, Switzerland
| | - Hannes Grünig
- Department of Nuclear Medicine, University Hospital Zürich, University of Zürich, Rämistrasse 100, CH-8091, Zürich, Switzerland
| | - Alexander Maurer
- Department of Nuclear Medicine, University Hospital Zürich, University of Zürich, Rämistrasse 100, CH-8091, Zürich, Switzerland
| | - Stephan Skawran
- Department of Nuclear Medicine, University Hospital Zürich, University of Zürich, Rämistrasse 100, CH-8091, Zürich, Switzerland
| | - Erika Orita
- Department of Nuclear Medicine, University Hospital Zürich, University of Zürich, Rämistrasse 100, CH-8091, Zürich, Switzerland
- Department of Radiology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan
| | - Daniele A Pizzuto
- Department of Nuclear Medicine, University Hospital Zürich, University of Zürich, Rämistrasse 100, CH-8091, Zürich, Switzerland
- Nuclear Medicine Unit, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168, Rome, Italy
| | - Désirée Deandreis
- Department of Nuclear Medicine, Città della Salute e della Scienza di Torino, University of Turin, Turin, Italy
| | - Reinhard Dummer
- Department of Dermatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Joanna Mangana
- Department of Dermatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Daniela Mihic-Probst
- Department of Pathology and Molecular Pathology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Niels Rupp
- Department of Pathology and Molecular Pathology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Martin W Huellner
- Department of Nuclear Medicine, University Hospital Zürich, University of Zürich, Rämistrasse 100, CH-8091, Zürich, Switzerland
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Alongi P, Argenziano G, Mansi L. Imaging in Melanoma Management: What's New Under the Sun? Curr Radiopharm 2020; 13:3-5. [PMID: 32183658 DOI: 10.2174/187447101301200218111438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Pierpaolo Alongi
- Nuclear Medicine Unit, Fondazione Istituto G.Giglio, Cefalu, Italy
| | | | - Luigi Mansi
- Section Health and Development, Interuniversity Research Center for Sustainability (CIRPS), Naples, Italy
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