1. Department of Radiology, Eunpyeong St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 03312, Republic of Korea
2. Department of Radiology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
3. Siemens Medical Solutions USA, Inc., Malvern, PA 19355, USA
4. Siemens Healthcare GmbH, Computed Tomography, 91301 Forchheim, Germany
5. Siemens Healthineers Ltd., Seoul 06620, Republic of Korea