多层螺旋CT肠道成像的临床研究

目的 探讨口服2.5%等渗甘露醇多层螺旋CT肠道成像(MSCTE)的优势及其临床价值.方法 40例临床怀疑为小肠肿瘤疾病者采用完全随机法分为2组,分别行常规法与改良法CT小肠MSCTE,对比2种方法观察6段小肠(1段为十二指肠,2段为空肠近段,3段为空肠远段,4、5、6段为回肠)的管腔扩张度及管壁厚度.20例临床怀疑胃肠道疾病患者行全胃肠CT成像检查.对胃肠道管腔扩张度评分及管壁厚度采用x2检验和t检验进行比较.结果 胃、回肠及各组大肠肠壁厚度分别为(2.56±0.52)、(1.41±0.15)、(1.46±0.13)、(1.91±0.25)、(1.97±0.26)、(2.01±0.19)、(2.04±0.24)和(2.05±0.18)mm.改良法MSCTE对2、3段(空肠近段和远段)小肠肠壁、肠腔及黏膜皱襞的显示效果明显优于常规法(P值均＜0.05),2种方法对1、4、5、6组(十二指肠和回肠)小肠肠壁、肠腔及黏膜皱襞的显示效果差异无统计学意义(P值均＞0.05).全胃肠CT成像对十二指肠及空肠充盈稍差,胃、回肠及大肠均充分充盈,胃肠道管腔、管壁及黏膜皱襞显示清晰.结论 改良法小肠MSCTE对空肠充盈效果更好,全胃肠CT成像能一次性使胃、小肠及大肠均较好的充盈,拓展了MSCTE的诊断范围.

Abstract：

Objective To investigate the value and usefulness of optimized multislice CT enterography (MSCTE) with orally administered isosmotic mannitol (2. 5%) as negative contrast in demonstrating the small bowel and its abnormality. Methods Forty patients suspected of intestinal tumors were randomly divided into two groups and underwent conventional or optimized MSCTE. The expansion degree of bowel lumen and the thickness of bowel wall were evaluated for the six segments of the small intestine. The other 20 patients suspected of gastrointestinal diseases underwent gastrointestinal CT imaging.The expansion degree of bowel lumen and the wall thickness of bowel wall were statistically analyzed with Chi-Square test and t test. Results The wall thickness of the stomach, ileum and colon were (2. 56 ±0.52) ,(1.41 ±0. 15),(1.46 ±0. 13),(1.91 ±0. 25), (1.97 ±0.26),(2.01 ±0. 19), (2. 04 ±0.24)and (2. 05 ±0. 18)mm. Optimized method was superior to conventional method in the expansion degree of the second and third segments of the small intestine (P ＜ 0. 05) . There was no significant differences between two groups in the expansion degree and depiction of mucosa for the other segments of small intestine (P ＞ 0. 05). The gastrointestinal CT imaging was poor in the depiction of the duodenum and jejunum, but stomach, ileum and colon were fully illustrated. Conclusion Optimized MSCTE was superior to conventional method in demonstrating the small bowel, and gastrointestinal CT imaging can expand diagnostic scope because of good observation of whole gastrointestinal tract.

The clinical research of multi-slice spiral CT in intestinal imaging

Objective To investigate the value and usefulness of optimized multislice CT enterography (MSCTE) with orally administered isosmotic mannitol (2. 5%) as negative contrast in demonstrating the small bowel and its abnormality. Methods Forty patients suspected of intestinal tumors were randomly divided into two groups and underwent conventional or optimized MSCTE. The expansion degree of bowel lumen and the thickness of bowel wall were evaluated for the six segments of the small intestine. The other 20 patients suspected of gastrointestinal diseases underwent gastrointestinal CT imaging.The expansion degree of bowel lumen and the wall thickness of bowel wall were statistically analyzed with Chi-Square test and t test. Results The wall thickness of the stomach, ileum and colon were (2. 56 ±0.52) ,(1.41 ±0. 15),(1.46 ±0. 13),(1.91 ±0. 25), (1.97 ±0.26),(2.01 ±0. 19), (2. 04 ±0.24)and (2. 05 ±0. 18)mm. Optimized method was superior to conventional method in the expansion degree of the second and third segments of the small intestine (P ＜ 0. 05) . There was no significant differences between two groups in the expansion degree and depiction of mucosa for the other segments of small intestine (P ＞ 0. 05). The gastrointestinal CT imaging was poor in the depiction of the duodenum and jejunum, but stomach, ileum and colon were fully illustrated. Conclusion Optimized MSCTE was superior to conventional method in demonstrating the small bowel, and gastrointestinal CT imaging can expand diagnostic scope because of good observation of whole gastrointestinal tract.