Application of low dose CT colonography combined with enhanced scan in the diagnosis of colorectal neoplasms
10.3760/cma.j.issn.1008-6706.2017.05.023
- VernacularTitle:低剂量 CT 结肠成像技术结合增强扫描在结直肠肿瘤诊断中的应用
- Author:
Yechuan FAN
- Keywords:
Tomography,X -Ray Computed;
Colorectal Neoplasms;
Diagnosis
- From:
Chinese Journal of Primary Medicine and Pharmacy
2017;24(5):728-731
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the clinical value of low dose CT colonography (CTC)combined application of enhanced scanning in the diagnosis of colorectal neoplasms,thus to provide a reference for clinical treatment.Methods 64 patients with suspected colorectal cancer were studied retrospectively,they were divided into two groups according to the diagnostic methods.The observation group(21cases)underwent low -dose CTC joint enhanced scan,the control group(43 cases)were taken usual routine dose CTC joint enhanced scan.The scanning image quality and radiation dose of two groups were compared.Took colonoscopy or pathological examination as diagnostic standard,the accuracy of two groups was compared.Results The excellent image rate of the observation group was 95.24%,which was lower than that of the control group,but the difference between the two groups was not statistically significant(χ2 =0.947,P =0.217).The radiation doses of the observation group were (1024.48 ± 98.64)mGy/cm,(15.37 ±1.48)mSv,which were significantly lower than those of the control group[(1411.28 ± 159.57)mGy/cm and (21.17 ±2.39)mSv],the differences were statistically significant (t =15.447,P =0.000;t =15.447,P =0.000).The diagnostic sensitivity,specificity,positive rate,negative rate of the observation group were 100.00%,85.71%,93.33%,100.00%,there were no statistically significant differences compared with the control group (χ2 =0.000,1.014,0.957 and 0.000,P =1.000,0.098,0.211 and 1.000).Youden index of the observation group and the control group were 0.86 and 0.92.Conclusion CTC combined with low -dose enhanced CT diagnosis for colorectal cancer has similar accuracy with conventional dose,and patients will take less radiation dose,it is worthy of clinical application.
