title: Dr Cai and colleagues respond.
authors.forename: Wenli
authors.initials: W
authors.lastname: Cai
authors.forename: June-Goo
authors.initials: JG
authors.lastname: Lee
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Yoshida
authors.forename: Se Hyung
authors.initials: SH
authors.lastname: Kim
mesh_terms: D016477:Artifacts; D023881:Colonography, Computed Tomographic / Q000379:methods*; D005243:Feces; D006801:Humans; D011856:Radiographic Image Enhancement / Q000379:methods*; D015900:Radiography, Dual-Energy Scanned Projection / Q000379:methods*; D013382:Subtraction Technique