Estimation of kidneys and urinary bladder doses based on the region of interest in fluorine-fluorodeoxyglucose positron emission tomography/computed tomography examination: a preliminary study.

Background: Kidneys and urinary bladder are common physiologic uptake sites of 18fluorine-fluorodeoxyglucose (F-FDG) causing increased exposure of low energy ionizing radiation to these organs. Accurate measurement of organ dose is vital as F-FDG is directly exposed to the organs. Organ dose from F-FDG PET is calculated according to the injected F-FDG activity with the application of dose coefficients established by International Commission on Radiological Protection (ICRP).