The application of low-dose CT virtual colonoscopy in colorectal tumor
10.3969/j.issn.1002-1671.2024.05.013
- VernacularTitle:低剂量CT仿真结肠镜在结直肠肿瘤中的应用
- Author:
Zhiqin DU
1
;
Caiyan ZHU
;
Jianxiang TAO
;
Lijuan WANG
;
Zhongchun ZHOU
;
Ruotian WANG
Author Information
1. 昆明医科大学附属延安医院 云南省肿瘤免疫防治研究重点实验室放射科,云南 昆明 650051
- Keywords:
low-dose;
computed tomography;
virtual colonoscopy;
colorectal tumor
- From:
Journal of Practical Radiology
2024;40(5):737-740
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the application of low-dose computed tomography virtual colonoscopy(LDCTVC)in colorec-tal tumor.Methods Forty-seven colorectal tumor were given low-dose CT abdominal scan(low-dose group),15 patients with normal body mass index(BMI)who received routine-dose CT abdominal scan at the same period(routine-dose group).Volume CT dose index(CTDIvol),dose length product(DLP),virtual colonoscopy and optical colonoscopy results were recorded.Results The effective dose with normal BMI was(2.86±0.47)mSv and(4.87±1.15)mSv in the low-dose and routine-dose groups,respectively.The CTDIvol and DLP between the two groups were statistically significant(P＜0.05).There were 14 cases of true positive,4 cases of false positive,5 cases of false negative and 24 cases of true negative in the low-dose group.The sensitivity,specificity and Kappa value of LDCTVC in the diagnosis of colorectal mucosal lesions were 73.7％,85.7％,and 0.6.Conclusion LDCTVC can reduce the effective dose by 50％and has a good diagnostic value for colorectal mucosal lesions,which can make up for the deficiency of colonoscopy and make accurate judgment of extra-mucosal lesions of the bowel wall.
