title: Virtual colonoscopy: time for some tough questions for radiologists and gastroenterologists.
authors.forename: D K
authors.initials: DK
authors.lastname: Rex
mesh_terms: D003110:Colonic Neoplasms / Q000175:diagnosis; D003111:Colonic Polyps / Q000175:diagnosis; D003113:Colonoscopy / Q000191:economics / Q000379:methods*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008403:Mass Screening; D006278:Medicare; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000191:economics / Q000379:methods*; D014481:United States