Motion Correction in Positron Emission Tomography (PET) for Cancer Imaging

Positron Emission Tomography (PET) provides important information on malignant tumors by visualizing metabolism of glucose in tissue. Its spatial resolution is up to 4-5 mm for whole-body imaging, but this resolution cannot be achieved in clinics due to respiratory motion of patient. There have been many attempts to address this issue by reducing motion artifacts in PET, PET/CT, and, recently, PET/MR. In this talk, I will introduce motion correction problem in PET for cancer imaging, summarize a few approaches to address this problem, and present our recent work on motion correction in simultaneous PET/MR