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Investigation on clinical application of CT virtual colonoscopy

ZHANG Lei, ZHAI Xiaoli, LI Jie, et al. Radiological Department, Beijing Red Cross Chaoyang Hospital affiliate of Capital University of Medical Sciences, Beijing 100020  
Objective To investigate the methods, imaging features and clinical value of CT virtual colonoscopy (CTVC). Methods Thirty one patients underwent volume scanning useing helical CT (Hispeed CT/i, GE). The diseases included adenocacinoma 25, adenomatous polyp 2, non Hodgkin's lymphoma 1, adenosquamocarcinoma 1 multiple diverticulum 1 and mucocele of appendix 1. All cases were proved by histology except the one with multiple diverticulum. Volumetric data was acquired, and 3D virtual colonoscopy images were generated from volumetric data using the Navigator soft ware. The CTVC images was observed along the axis of colon using the soft ware, Fly through. Results CTVC correctly demonstrated the detail of surface of masses. It could show the daughter nodules around the main mass, an indication of malignancy, and the normal or abnormal mucosal folds. CTVC had lower sensitivity for flat lesion. Conclusions CTVC has proved to be a non invasive and useful tool in the detection of space occupying lesions of the colon. CTVC has good prospect of clinical application.
【CateGory Index】: R814.42
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