Lesion detection and workflow optimization in whole body diffusion MR imaging using trimodality PET/CT+MR in the oncology setting.

The purpose of this study is to evaluate a rapid, whole-body MR protocol to determine the value PET/CT+MR tri-modality imaging provides in addition to conventional PET/CT with respect to small lesion detection. All FDG-avid visceral organ lesions and lymphadenopathy seen on PET/CT demonstrated restricted diffusion on DWI. Rapid trimodality whole body DWI MRI shows a good correlation with FDG avid lesions in the oncological setting, and DWI may help improve clinical confidence in small PET/CT equivocal lesions. Whole body DWI can be performed within the time constraints of a normal diagnostic PET/CT thereby adding additional information without affecting workflow.

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