A comparison of single and multi row CT colonography in the detection of colorectal polyps

Congress:

ECR 2004

Poster Number:

C-136

Type:

Scientific

Keywords:

Authors:

P. Vagli, E. Neri, S. Picchietti, G. Naldini, M. Rossi, C. Bartolozzi; Pisa/IT

DOI:

10.1594/ECR04/C-136

DOI-Link:

https://dx.doi.org/10.1594/ECR04/C-136

Fig. 1: fig 1 There is a significant difference in slice thickness between single-row...

Fig. 2: fig 23D movie volume rendering of single-row CT data set.

Fig. 3: fig 33D movie volume rendering of multi-row CT data set (an anular stenosing...

Fig. 4: fig 4 Colonic segments.

Methods and Materials

Between 1996 and 2003, seventy-two consecutive patients with a moderate to high risk of developing colorectal cancer (first-degree relatives with colorectal neoplasia, prior personal history of colorectal neoplasia, positive faecal occult blood test), underwent CTC followed by complete conventional colonoscopy (CC) within 24 hours. CTC were obtained by means of single-row CT (n=20) and multi-row CT (n=52) (Fig 1),

Fig.: fig 1 There is a significant difference in slice thickness between single-row CTC acquisition protocol vs multi-row CTC. High beam collimation allows high definition and depiction of very small lesions and anatomic details.

(Fig 2 3D movie), (Fig 3 3D movie).Sensitivity and specificity of single and multi-row CTC for detection of colorectal polyps were assessed considering the presence/absence of polyps in four ideal colonic segments (cecum-ascending C-A, transverse TR, descending DE, sigmoid-rectum S-R) (Fig 4).

Fig.: fig 4 Colonic segments.

CC was used as standard of reference.