Clinical Impact of PET/MR Imaging in Patients with Cancer Undergoing Same-Day PET/CT:Initial Experience in 134 Patients-A Hypothesis-generating Exploratory Study

摘要

To compare the clinical impact of combined positron emission tomography (PET) and magnetic resonance (MR) imaging to that of combined PET and computed tomography (CT) performed on the same day in patients with cancer.This HIPAA-compliant retrospective study was approved by the institutional review board. Patients gave written informed consent for study enrollment, including the possibility to use their imaging and clinical data in future evaluations. A total of 134 patients with cancer with a non-central nervous system primary neoplasm underwent same-day fluorodeoxyglucose (FDG) PET/CT and FDG PET/MR imaging. PET/CT and PET/MR studies were independently interpreted by teams of radiologists and nuclear medicine physicians. Four readers, divided into two teams composed of one radiologist and one nuclear medicine physician each, read all 134 studies. The referring physician classified discordance between PET/CT and PET/MR observations either as findings affecting clinical management or as findings not affecting clinical management. Data were compared with the x~2 test.