| Objective: 1.To explore the value of dual-source CT energy spectrum parameters in the identification of intestinal tumors and inflammatory lesions.2.To explore the value of dual-source CT energy spectrum parameters in differential diagnosis of metastatic lymph nodes and reactive proliferative lymph nodes in intestinal tumors.Methods: 1.43 cases of patients,including 24 males and 19 females,aged 30-82 years old,were double-source CT angiography,a total of three scanning,that is,conventional plain scan,arterial phase and venous contrast enhanced dual energy scan 100 kv / 140 kv,the dual energy scan 2 sets of data(140 kV,100 kV)into the Dual-Energy post-processing software.Using the Liver-VNC tab,adjust the fusing ratio to 100% to obtain the iodine distribution pseudo-color map,measure the iodine value and CT value of the abnormal intestinal wall and the abdominal aorta or iliac artery in the iodine map,and calculate the standard iodine value.Value,to obtain all the data,according to pathological results or microscopic examination of inflammatory lesions and tumor lesions were grouped.The measurement data were expressed as mean ± standard deviation,and the independent samples t test were used to compare the mean values.Two independent samples were selected for repeated measurement.The CT values,iodine value,normalized CT value and normalized iodine value were compared.Construction of iodine value,CT value,standardized iodine value,standardized CT value of the ROC test curve,compared the diagnostic efficacy.2.There were 25 patients with cancer.The scanning method and iodine map are obtained by the same method.Measure the iodine value of the primary tumor of the intestinal tumor and the lymph node in the abdominal area;Select the Mono Energetic tab to analyze the spectrum.After all the data were obtained,SPSS21.0 software was used for statisticalanalysis.The iodine value and slope of the energy spectrum of the three groups of images were compared by a single sample t test.If there were statistical differences,the comparison was made between the two t-test tests.Results: 1.Postoperative pathology or microscopic examination confirmed rectal cancer in 15 cases,9 cases of sigmoid colon cancer,ascending colon cancer in 4 cases,chronic inflammation in 15 cases.SPSS21.0software was used for statistical analysis.The CT val ue,iodine value,standardized CT value,standardized iodine value were higher than those of inflammatory lesions CT value,iodine value,standardized CT value,standardized iodine value.CT value in the inflammatory lesions and tumor lesions was no significant difference(P>0.05),standardized CT values in the inflammatory and neoplastic lesions in the difference was statistically significant(P<0.05),and iodine value and The difference in standardized iodine value between the two groups was statistically significant(P=0.000).According to the ROC curve area closer to 1 shows that the better the diagnostic results,the iodine value of the diagnostic efficiency is higher than the CT value,after the standardization of iodine value,CT value is higher than the standard.2.Postoperative pathology confirmed that 25 cases of intestinal cancer patients,the primary tumor 25,were found in the abdominal area lymph nodes 50,of which 29 metastatic lymph nodes,reactive hyperplasia lymph nodes 21 The levels of iodine in the primary lesion.The differences of iodine content and slope of the curve were statistically significant(P <0.05).There was no significant difference in iodine content and slope of curve between primary and metastatic lymph nodes(P> 0.05).Conclusion: 1.In the examination of patients’ intestinal angiography,double-source CT dual-energy scanning iodine value can help to identify intestinal tumor and inflammatory lesions.2.In patients with intestinal imaging examination,dual-source CT scan iodine value and dual energy spectrum curve slope of intestinal tumor metastatic lymph nodes and the differential diagnosis of hyperplasia of reactivity lymph node has certain value. |
PDF Full Text Request