低剂量MSCT在输尿管微小结石诊断中的应用价值OA

Objective To investigate the application value of low-dose multi-slice spiral computed tomography(MSCT)in the diagnosis of ureteral microcalculi(stone diameter≤5 mm).Methods A total of 86 patients with ureteral microcalculi admitted to Xiangzhou District People's Hospital of Zhuhai City from January 2025 to December 2025 were retrospectively enrolled as study subjects.According to the actual clinical scanning protocol,they were divided into the low-dose group(n=48,received low-dose MSCT)and the conventional group(n=38,received conventional-dose MSCT).The stone detection rate,radiation dose and image quality were compared between the two groups.Results The stone detection rates of the low-dose group and the conventional group were 93.65%and 94.23%respectively,with no statistically significant difference(P>0.05).The volume CT dose index(CTDIvol)and dose-length product(DLP)in the low-dose group were lower than those in the conventional group(P<0.05).There were no statistically significant differences in image quality indicators such as signal-to-noise ratio,contrast-to-noise ratio,subjective image score and background noise between the two groups(P>0.05).Conclusions Low-dose MSCT has high application value in the diagnosis of ureteral microcalculi.Its stone detection efficacy is equivalent to that of conventional-dose MSCT,while the radiation dose is significantly reduced,which can decrease patients'ionizing radiation exposure.