Multi-slice spiral CT evaluation in Crohn's disease of small bowel / 中华放射学杂志

ABSTRACT

Objective To assess the value of enhanced MSCT scan for the Crohn's disease of small bowel.Methods Fourty-five patients of small bowel Crohn's disease who were proved by multi-methed were examined by two-phase enhanced scan with MSCT.The images were reformed in ADW 4.2 by MPR mainly.The CT values of the lesion segments in different phases were tested, with one way ANOVA in statistical analysis; the density difference between the lesion segments and normal segments in different phases were tested,the cases were divided according to 10 HU,and compared them with each other by X2 test.Results The average CT value of lesion segments was (39.3±3.7) HU in plain scan, (74.8 ± 13.8) HU in artery phase, (90.2 ± 12.3) HU in portal vein phase, there were sinigicant difference in them(F =258.87,P < 0.01).There were sinigicant difference in CT value of lesion segments between any phase and other two phases (P < 0.05).In 45 cases, there were 44 cases and one case that the difference of CT value were ≤±10 HU and > 10 HU respectively in plain scan, 6 cases and 39 cases in artery phase, 2 cases and 43 cases in portal vein phase, by X2 test, there were sinigicant difference betwwen plain scan and artery phase(X2 =32.49,P <0.01), and significant difference between plain scan and portal vein phase(X2 = 39.22,P <0.01), there were no significant difference between artery phase and portal vein phase (X2 = 1.10,P>0.05).After enhancement, the lesions can display clearly than plain scan, and the detectable rate was raised highly.Conclusion Two-phase enhancement scan can diagnosis the Crohn's disease of small bowel and evaluate it overall.