Virtal CT colonoscopy versus conventional colonscopy: a prospective study

Thirty-two patients [22 males and 10 females, mean age 47 years] with different colorectal complaints were investigated by CT colonography. The scanning parameters were collimation of 5 mm, table speed of 6.25 mm/s and pitch of 1.25. All images were evaluated in axial slices, reformatted images with endoluminal and extraluminal views. All patients were reexamined by the conventional colonoscope, CT colonography and colonoscopy. The study concluded that the high resolution and multiple image display of CT colonography allow the detection of many colorectal lesions. CT colonography is also a noninvasive imaging modality that is particularly valuable in poor risky patients and for colorectal examination proximal to an obstructing lesion