1. Imaging and Medical Physics, Department of Radiology and Imaging Sciences, Emory University School of Medicine, 1701 Uppergate Drive, C‐5018, Atlanta, Georgia 30322 and School of Automation, Xi'an University of Posts and Telecommunications, Xi'an, Shaanxi 710121, China
2. Imaging and Medical Physics, Department of Radiology and Imaging Sciences, Emory University School of Medicine, 1701 Uppergate Drive, C‐5018, Atlanta, Georgia 30322