Application value of CT virtual colonoscopy and CTA imaging of mesenteric vessels in#br#
the diagnosis of sigmoid volvulus
OU Hong-ru1, JIA Hong-ming1, JIAN Jian-cheng1, CHENG Hai-xiong2, YANG Shao-min2, CHENG Xin3
1.Department of Radiology, the Second People’s Hospital of Shunde District of Foshan, Foshan Guangdong 528305, China;
2.Department of Radiology, the First People’s Hospital of Shunde District of Foshan, Foshan Guangdong 528305, China;
3.Guangdong Provincial Hospital of Traditional Chinese Medicine, Guangzhou Guangdong 510120, China
Abstract：Objective: To analyze diagnostic values of CT virtual colonoscopy and computed tomography angiography imaging of mesenteric vessels for volvulus of sigmoid. Methods: Imaging data of 12 patients were analyzed retrospectively, who were confirmed as volvulus of sigmoid by multislice computed tomography(MSCT) examinations and surgeries. Intestinal canals and mesenteric vessels were shown with CT virtual endoscopy(CTVE), volume rendering(VR), maximum intensity projection(MIP), multi-planar reformation(MPR) and other post-processing reconstruction techniques. Results: CTVE indicated that there were various degrees of pneumatosis and expansion of sigmoid colon in 12 patients, including 11 patients with the shape of "U" and 1 patient with the shape of "C". The horseshoe-shape convolutions sensitivity of closed loop volvulus was 91.7%(11/12) in CTVE, which was higher compared with that in the plain abdominal radiograph(41.6%, 5/12); and there were statistical differences(P<0.05). CTA displayed that there were abnormal courses of sigmoid arteries in 8 patients, proximal segment of volvulus in 6 patients, and disordered structure in 2 patients. MIP showed 2 patients with the development of arterial arch of colon being sparse and pale, which was confirmed as ischemia of the intestinal wall by surgeries. Conclusions: As displayed a certain diagnostic value to judge whether patients combine with intestinal ischemic necrosis or not, MSCT combined with CT virtual colonoscopy and CTA imaging mesenteric vessels can visually show volvulus of sigmoid in closed loop convolutions shape.
欧鸿儒1，贾红明1，简坚成1，陈海雄2，杨少民2，陈 鑫3. CT仿真结肠镜及肠系膜血管CTA成像在乙状结肠扭转的诊断价值[J]. 中国临床医学影像杂志, 2017, 28(9): 647-650.
OU Hong-ru1, JIA Hong-ming1, JIAN Jian-cheng1, CHENG Hai-xiong2, YANG Shao-min2, CHENG Xin3. Application value of CT virtual colonoscopy and CTA imaging of mesenteric vessels in#br#
the diagnosis of sigmoid volvulus. JOURNAL OF CHINA MEDICAL IMAGING, 2017, 28(9): 647-650.
2017, Vol. 28 
