From the ∗Department of Radiology, Seoul National University College of Medicine

†Medical Imaging AI Research Center, Canon Medical Systems Korea

‡ConnectAI Research Center, Yonsei University College of Medicine, Seoul

§Department of Radiology, Wonju Severance Christian Hospital, Wonju College of Medicine, Yonsei University of Korea, Wonju, Republic of Korea.

Received for publication December 30, 2021; accepted April 18, 2022.

Correspondence to: Hyunjung Kim MD, Department of Radiology, Wonju Severance Christian Hospital, Wonju College of Medicine, Yonsei University of Korea, Wonju, Republic of Korea (e-mail: [email protected]).

Ethics approval and consent to participate: The institutional review board of the Wonju Severance Christian Hospital approved this retrospective study (IRB File No. CR321137).

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

The coauthors (J.-K.R., H.S.) are employees of Canon Medical Systems Korea, Seoul, Korea, which is a subsidiary of Canon Medical Systems Corporation, Otawara-si, Japan. The remaining authors declare no conflict of interest.