title: Reply.
authors.affiliation: Department of Radiology Chungnam National University Hospital Chungnam National University School of Medicine Daejeon, South Korea.
authors.forename: I H
authors.identifier: 0000-0003-0659-1721
authors.initials: IH
authors.lastname: Lee
authors.affiliation: Department of Radiology Chungnam National University Hospital Chungnam National University School of Medicine Daejeon, South Korea.
authors.forename: D M
authors.identifier: 0000-0001-9202-0276
authors.initials: DM
authors.lastname: Kim
authors.affiliation: Department of Radiology Chungnam National University Hospital Chungnam National University School of Medicine Daejeon, South Korea.
authors.forename: C J
authors.identifier: 0000-0002-6683-445X
authors.initials: CJ
authors.lastname: Song