Usefulness of Integrated PET/MRI in Oropharyngeal Squamous Cell Carcinoma Evaluation

PET/MRI data will be acquired on the integrated PET/MRI scanner. After fast-view T1-weighted MR localizer sequence for scout imaging and Dixon VIBE sequence for attenuation correction, a whole-body PET scan will be performed to cover from the head to the proximal thigh, with an acquisition time of 4 min per bed position. Simultaneously, whole body MR image acquisition will be performed with the axial HASTE sequence and coronal STIR sequence as well as the sagittal T1-weighted Turbo spine echo and STIR sequence. Afterwards, regional PET and MRI images will be simultaneously performed. DWI will be performed using a single shot spin-echo echo-planar technique. A total of 10 b values will be used for the reconstruction of IVIM and kurtosis imaging. DCE-PWI will be acquired by using a 3D T1-weighted spoiled gradient-echo sequence. Thereafter, dedicated regional MRI will be obtained. Finally, whole body axial VIBE with fat saturation will be performed.