Application Value of Low-KV CT Scan for Bladder Cancer

Abstract：Objective:To investing the parameter optimization of low KV-CT for bladder cancer.Methods:164 patients with suspected bladder cancer in February 2008-November randomly divided into conventional group and A,B,C three test group,41 cases in each group.Conventional group using 120 kV,100 mA,using different tube voltage and current test group,group A,100 kV,100 mA;B group 80 kV,100 mA;C group 60 kV,100 mA,the other parameters, layer thickness 5 mm,pitch of 1.0 mm,scan time 1 s. After the scan,the image quality obtained in the different conditions in accordance with the 5-point evaluation image quality;were recorded under different scan conditions Dose Index (CTDI) values used to estimate the patient exposed radiation dose.Results:The image quality with routine scanning conditions is a bit better than the low KV-CT,but there is no statistical difference (P>0.05).The radiation-dose of low KV-CT is much lower than the routine scanning conditions,the difference is very significant(P<0.01).Conclusion:Using of low KV-spiral CT scanning in bladder cancer is feasible,Can not only guarantee the quality of image and reduce the radiation harm of CT scan to patients.