In this study, we are developing new magnetic resonance imaging (MRI) and ultrasound methods to determine if it is effective in diagnosing complication in kidney transplant patients. Participants in this study will involve patients that have had a kidney transplant and are scheduled for a kidney biopsy. The study will also involve a comparison group of healthy individuals that have no history of kidney conditions. Study procedures will include a review of medical history and medications, MRI scan and ultrasound of the abdomen and blood/ urine test.