To objectively compare residual colonic fluid volume and attenuation of oral sulfate solution (OSS) with four different established cathartic regimens using an automated volumetric software tool at CT colonography (CTC).
Methods
This HIPAA-compliant study had institutional review board approval. Volumetric analysis of residual contrast-tagged colonic fluid was performed on CTC studies in 263 adults (mean age, 60.1 years; 137M/126F) using an automated volumetric software tool. 23 patients receiving 177 ml OSS (SUPREP; single-bottle purgation) were compared with 60 patients each receiving 45 ml sodium phosphate (NaP), 90 ml NaP (2xNaP), 592 ml (two bottles) magnesium citrate (MgC), and 4000 ml polyethylene glycol (PEG). All patients received oral contrast cleansing after catharsis. Data were analyzed with unpaired t test with Welch correction and F test.