title: Error count of radiopaque markers in colonic segmental transit time study.
abstract: OBJECTIVE
  The objective of our study was to evaluate the feasibility and efficacy of a radiologic technique in increasing colon visibility in colonic transit time studies. Three radiologists counted segmental colonic radiopaque markers in two patient groups, based on classic criteria in the first group and also on a colonic barium trace in the second. Agreement between marker counts was assessed using method comparison analysis.
  
  
  CONCLUSIONS
  With the barium trace technique, the anatomic conspicuity of colonic segments is improved, a correct segmental marker count can be obtained, and colonic inertia can be more easily distinguished from distal constipation.
authors.affiliation: Department of Medical Diagnostic Sciences and Special Therapies, Padua University Hospital, Via Giustiniani 2, 35128 Padua, Italy. fabio.pomerri@unipd.it
authors.forename: Fabio
authors.initials: F
authors.lastname: Pomerri
authors.forename: Anna C
authors.initials: AC
authors.lastname: Frigo
authors.forename: Francesco
authors.initials: F
authors.lastname: Grigoletto
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Dodi
authors.forename: Pier C
authors.initials: PC
authors.lastname: Muzzio
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D001464:Barium / Q000493:pharmacokinetics; D003106:Colon / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D003248:Constipation / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D003287:Contrast Media / Q000493:pharmacokinetics; D005240:Feasibility Studies; D005260:Female; D005772:Gastrointestinal Transit; D006801:Humans; D008297:Male; D008875:Middle Aged; D011860:Radiography, Abdominal; D015203:Reproducibility of Results; D013997:Time Factors
chemical_list: D003287:Contrast Media; D001464:Barium