title: The value of prone imaging in CT pneumocolon.
abstract: OBJECTIVE
  To evaluate the value of prone imaging in computed tomography pneumocolon.
  
  
  METHODS
  In the U.K., patients commonly undergo computed tomography (CT) pneumocolon in the supine position alone. A prospective analysis of both supine and prone CT images was performed. The degree of distension and the presence/absence of fluid/faecal residue were documented.
  
  
  RESULTS
  Twenty-five patients were examined in total. In all cases, all five segments of the colon were well visualized on combined assessment of supine/prone images. Diagnostic distension was obtained in all five segments of the bowel in 69% of cases in the prone position, but in only 24% of patients in the supine position. The rectum and sigmoid colon were well distended in 100 and 88%, respectively, on prone CT, but in only 58 and 35% of cases, respectively, on supine CT. Problems encountered by fluid/faecal residue were eliminated on prone CT.
  
  
  CONCLUSIONS
  Adjunctive prone pelvic CT should be performed in all patients undergoing CT pneumocolon unless the supine images can be fully reviewed and shown to be satisfactory before the patient leaves the CT department. If a single positional sequence is to be performed, then prone CT is the position of choice.
authors: Department of Diagnostic Radiology, Central Middlesex Hospital, London, U.K.
authors: A A
authors: AA
authors: Yong
authors: J E
authors: JE
authors: Harris
authors: P J
authors: PJ
authors: Shorvon
mesh_terms: D003108:Colonic Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D011029:Pneumoradiography / Q000379:methods*; D016684:Prone Position; D011446:Prospective Studies; D012002:Rectal Diseases / Q000000981:diagnostic imaging*; D016683:Supine Position; D014057:Tomography, X-Ray Computed / Q000379:methods*