摘要
目的分析儿童小肠病变MRI表现,评价小肠MR成像在儿科中的临床应用价值。方法对12例经手术和病理证实的小肠病变患儿进行回顾性分析,检查前让患儿口服2.5%的等渗甘露醇溶液后,静脉注射山莨菪碱0.3mg/kg,随后行MR扫描,扫描方法包括冠状面真稳态进动快速成像(TrueFisp)序列,横断面及冠状面T1WI、T2WI脂肪抑制序列、vibe超薄容积扫描(压脂)序列,然后行带脂肪饱和技术的T1WI横断面及冠状面增强扫描。结果 12例患儿均能接受等渗甘露醇溶液,未发现并发症,其中Crohn病6例,共显示16段炎症肠管,MRI表现为增强后病变肠壁强化明显,病变肠段肠壁增厚(厚度为5～14mm),且多表现环形增厚,肠壁厚薄不均,肠腔变窄。十二指肠球部慢性溃疡、十二指肠球部穿孔、胃肠吻合口溃疡、小肠梗阻(柿石症)、小肠淋巴瘤、肠套叠各1例。小肠MR成像不仅显示了病变本身,还显示了肠壁、肠外血管及肠系膜脂肪的情况。结论小肠MR成像安全、有效、无创、无电离辐射,能全方位多维显示儿童小肠疾病的方法。
Objective： To discuss the MR features of the small intestinal disease of children, and to assess the usefulness of MR enterography （MRE） in pediatric patients. Materials and Methods： The MRI findings of 12 cases of small intestinal diseases proved by operation and pathology were reviewed. Before the examination, the children suspected of various kinds of small intestinal diseases were administered isosmotic mannnitol （2.5%） as oral enteric contrast agent and 0.3 mg/kg of raceanisodamine hydrochloride was injected intravenously, MR scanning was performed 5 to 10 minutes later. The pulse sequences include coronal true fast imaging with steady- state precession （TrueFisp） images, axial and coronal Tl-weighted images, T2- weighted fat-suppressed images, coronal fat-suppressed three-dimensional gradient- echo MR image, immediately followed by contrast enhanced axial and coronal T1- weighted fat-suppressed images. Results： The taste of isosmotic mannitol was good （slight sweet） and acceptable by all children. MRE features of many kinds of small bowel diseases were clearly displayed, including wall thickening, mesenteric fibrofatty change, mesenteric vasculature change, and so on. Six of 12 patients were Crohn＇s disease, MRI displayed 16-segment inflammatory bowel which demonstrated wall thickening, luminal stenosis and enhanced image demonstrated intestinal lesion is significantly enhancement. Lymphoma, enteric persimmon lithiasis, intussusception, Chronic duodenal ulcer, duodenal perforation, gastrointestinal anastomotic ulcer one each. Conclusion： MRE is a simple, safety, noninvasive, efective method without the need for ionizing radiation for evaluating small bowel diseases.
出处
《磁共振成像》
CAS
2012年第3期188-193,共6页
Chinese Journal of Magnetic Resonance Imaging
基金
浙江省教育厅科研基金项目资助(编号:N20110452)
关键词
小肠
肠疾病
磁共振成像
儿童
Intestine, small
Intestine diseases
Magnetic resonance imaging
Child
