The effect of different bowel preparations on residual fluid during compute
d tomographic (CT) colonography was evaluated. Forty-two patients received
either a polyethylene glycol electrolyte solution preparation or a phospho-
soda preparation the day prior to CT colonography. The amount of residual f
luid was calculated for each patient. On average, a phospho-soda preparatio
n provided significantly less residual fluid than a polyethylene glycol ele
ctrolyte solution preparation.