【摘要】 目的评价不同扫描条件腰椎多层螺旋CT扫描对成像质量及辐射剂量的影响,探讨多层螺旋CT在腰椎软组织病变扫描中适宜的低剂量扫描参数。方法通过CT设备扫描患者腰椎,以240 mAs为起点,逐渐降低管电流量,记录CT主机上显示的辐射剂量;评价图像质量采用adw 4.3工作站,统计学处理采用SPSS18.0软件。结果管电流量80 mAs扫描所获得的图像评分均不低于3分,其产生的辐射剂量为6.81 mGy;而管电流量240 mAs扫描所获得的图像评分均为4分,其产生的辐射剂量为20.22 mGy。结论腰椎软组织多层螺旋CT低剂量扫描的适宜扫描参数为80 mAs。更多还原

【Abstract】 Objective To evaluate the effect of lumbar spine multiple-slice spiral CT different scanning schemes on image quality and radiation dose and investigate the suitable low-dose scanning parameters of multiple-slice spiral CT in lumbar spine soft tissue lesions. Methods We scanned the patients’ lumbar spine by CT equipment. We started with 240mAs and gradually reduced mAs. We also recorded the radiation dose showed by the CT host computer and evaluated image quality by the adw 4.3 workstation. We analyzed data through SPSS 18.0. Results All image quality scores were no less than 3 points at 80mAs, and the radiation dose at 80mAs was 6.81mGy. All image quality scores were 4 points at 240mAs, and the radiation dose at 240mAs was 20.22mGy. Conclusion The suitable multiple-slice spiral CT low-dose scanning parameters in the lumbar spine soft tissue lesions is 80mAs.更多还原