Abstract
Purpose
To assess the diagnostic performance of simultaneous whole-body 2-deoxy-2-[18F]fluoro-D-glucose ([18F]FDG) positron emission tomography (PET)/magnetic resonance imaging (MRI) compared to [18F]FDG PET/x-ray computed tomography (CT) for detection of distant metastatic disease in patients with malignant melanoma.
Procedures
We included patients with malignant melanoma who underwent a single injection [18F]FDG dual-imaging protocol that included whole-body PET/CT and subsequent whole-body PET/MRI for staging or restaging purposes in a prospective setting. Images from both modalities were analyzed by two rater teams for the presence of metastatic lesions. PET/CT–PET/MRI overall agreement as well as region-based accuracies, sensitivities (Se), and specificities (Sp) were computed.
Results
Between July 2014 and December 2018, 22 patients were enrolled. Interrater agreement and overall accuracy (consensus reading) were 78.8 % (95 % CI 71–84.9) and 96.1 % (95 % CI 92.3–98) for PET/MRI and 78 % (70.2–84.3) and 97.4 % (95 % CI 93.7–98.9) for PET/CT, respectively (P = 0.42). PET/MRI reached a region-based Se of 89.1 % (95 % CI 79.4–94.5) and a Sp of 100 %, whereas PET/CT showed a region-based Se of 92.7 % (95 % CI 84–96.9) and a Sp of 100 % for the detection of metastatic disease in malignant melanoma.
Conclusions
Whole-body [18F]FDG-PET/MRI appears to be comparable to [18F]FDG-PET/CT for lesion detection in patients with malignant melanoma.
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Funding
The study was supported by the Jubilaeumsfonds of the Oesterreichische Nationalbank (OeNB) project number 16888.
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MEM has received speaker honoraria and research support from Siemens Healthineers, as well as speaker honoraria from Bristol-Myers Squibb.
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Berzaczy, D., Fueger, B., Hoeller, C. et al. Whole-Body [18F]FDG-PET/MRI vs. [18F]FDG-PET/CT in Malignant Melanoma. Mol Imaging Biol 22, 739–744 (2020). https://doi.org/10.1007/s11307-019-01413-7
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DOI: https://doi.org/10.1007/s11307-019-01413-7