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

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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.

Key words： Sigmoid diseases Tomography, spiral computed

Received: 09 January 2017

PACS:	Ｒ656.9
	Ｒ814.42

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	Articles by authors
	OU Hong-ru1
	JIA Hong-ming1
	JIAN Jian-cheng1
	CHENG Hai-xiong2
	YANG Shao-min2
	CHENG Xin3

Cite this article:

OU Hong-ru1,JIA Hong-ming1,JIAN Jian-cheng1, et al. Application value of CT virtual colonoscopy and CTA imaging of mesenteric vessels in#br# the diagnosis of sigmoid volvulus[J]. JOURNAL OF CHINA MEDICAL IMAGING, 2017, 28(9): 647-650.

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http://www.jccmi.com.cn/EN/ OR http://www.jccmi.com.cn/EN/Y2017/V28/I9/647

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