CT virtual colonoscopy in patients with incomplete conventional colonoscopy / 中华医学杂志(英文版)

ABSTRACT

<p><b>OBJECTIVES</b>To study the usefulness of CT virtual colonoscopy (CTVC) in patients with incomplete conventional colonoscopy (CC) and assess the statistical differences between two methods of colorectal segment examination.</p><p><b>METHODS</b>Sixty patients with incomplete CC underwent volume scanning using spiral CT. CT VC images were obtained using a navigator software in workstation. All patients were confirmed by surgical or CC biopsy histology. Statistical analysis was done using t test comparing two sample percentages.</p><p><b>RESULTS</b>CTVC succeeded in 55/60 patients (91.7%) who had incomplete CC. Additional lesions were identified in the proximal colon in 15/55 patients (27.3%), including 1 primary carcinoma, 16 polyps in 13 patients and 1 ulcerative colonitis. The main cause of incomplete CC was occlusive mass; others were redundant, tortuous colon loops, and excessive colonic spasm. There was a statistically significant difference between the two methods in colorectal segment examination.</p><p><b>CONCLUSION</b>CTVC is a feasible and effective adjunctive method for evaluating the entire colorectal segment following an incomplete CC procedure. It offers a new approach for colorectal examination.</p>