Affiliation: | aDepartment of Radiology, University of Colorado at Denver Health Sciences Center, Denver, Colo. bDepartment of Medical Physics, University of Crete, Heraklion, Greece. cDepartment of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, Calif. dRussell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, Md. |