1. From the Department of Radiology, Changzheng Hospital, Second Military Medical University, 415 Fengyang Rd, Shanghai, China 20003 (K.L., Q.L., W.T., Y.W., L.F., Y.X., S.L.); and Infervision Advanced Institute, Beijing, China (J.M., Z.Z., M.S., Y.D., C.X., R.Z.).