Diagnostic efficiency of CT enterography comprehensive score combined with spectral imaging for Crohn's disease in active phase / 中国医师杂志

ABSTRACT

Objective:To explore the diagnostic efficiency of CT enterography (CTE) comprehensive score combined with spectral imaging for Crohn's disease (CD) in active phase.Methods:A retrospective analysis was performed on the case data of 87 CD patients who were admitted to the First People's Hospital of Chenzhou from October 2018 to October 2020. According to CD activity index (CDAI), they were divided into active phase group ( n=58) and remission phase group ( n=29). The results of CTE and spectral imaging in both groups were collected. The diagnostic value of CTE comprehensive score combined with spectral imaging for CD in active phase was analyzed. Multiple linear stepwise regression analysis was used to analyze the independent related factors affecting the active phase of CD. Receiver operating characteristic (ROC) curve was used to predict the area under curve (AUC), sensitivity, specificity and cutoff value of CTE comprehensive score combined with energy spectrum imaging (intestinal wall thickness, intestinal wall uniform enhancement and iodine concentration in portal phase) in active phase of CD. Results:The probability of comb sign, intestinal stenosis or expansion and target sign in CTE of patients with active CD was significantly higher than that in patients with remission CD, the probability of fat sign was significantly lower than that in patients with remission CD, and the CTE comprehensive score was significantly higher than that in patients with remission CD ( P<0.05). Multiple linear stepwise regression analysis showed that the thickness of intestinal wall, uniform enhancement of intestinal wall and iodine concentration in portal phase were independent related factors affecting the active phase of CD ( P<0.05). ROC curve analysis showed that AUC of CTE comprehensive score combined with intestinal wall thickness, intestinal wall uniform enhancement and iodine concentration in portal phase for predicting CD in active phase was 0.953, higher than 0.869, 0.907, 0.914 and 0.913 of single index. The cut-off values of CTE comprehensive score, intestinal wall thickness and iodine concentration in portal phase were 6.0 points, 0.89 cm and 2.68 mg/ml, respectively. There was no homogeneous enhancement of intestinal wall in spectral imaging. Conclusions:CTE comprehensive score combined with intestinal wall thickness, intestinal wall enhancement and iodine concentration in portal phase can more accurately determine CD in active phase, which provide a new quantitative diagnostic reference.