多层螺旋CT低剂量技术在肝癌患者腹部扫描中的应用  

Application of low-dose multi-slice spiral CT scanning in abdomen examination of patients with hepatocellular carcinoma

作　　者：王现锋[1] 邱维加[1] 周智鹏[1] 张辉阳[1] 何敏丽[1] 曾阳东[1] 秦丽莉[1] 

机构地区：[1]桂林医学院,广西桂林541004

出　　处：《实用放射学杂志》2013年第3期388-391,共4页Journal of Practical Radiology

基　　金：广西自然科学基金（2011GXNSFB018084）;广西卫生厅自筹经费科研课题（Z2012410）.

摘　　要：目的 探讨多层螺旋CT低剂量技术降低肝癌患者腹部CT检查辐射剂量的价值。方法 66例疑似或者确诊肝癌患者按就诊顺序随机分为2组：A组为常规剂量组采用螺旋扫描；B组为低剂量组采用轴位扫描。2组均采用120 kV，自动毫安，噪声指数为9，分别行平扫、动脉期及静脉期扫描。比较2组在图像质量评分、噪声值水平和辐射剂量上的差异。结果 2组图像质量评分差异无统计学意义（P＞0.05）；2组图像平扫、动脉期、静脉期噪声值差异无统计学意义（P＞0.05）；2组有效剂量比较，差异有统计学意义（P＜0.01）。结论 轴位扫描和自动毫安技术能在满足诊断的前提下，有效降低肝癌患者腹部CT扫描的辐射剂量。Objective To evaluate the value of low-dose technique abdominal imaging of patients with hepatocellular carcinoma. Methods to reduce the radiation dose in multi-slice spiral CT scanning in 66 patients were divided into two groups,33 patients in group A, underwent conventional-dose multi-slice spiral CT examination by spiral scan with 120 kV,auto mA, noise index= 9; 33 patients in group B, underwent low-dose multi-slice spiral CT examination by axial scan with 120 kV,auto mA, noise index= 9. Both groups underwent plain scans, arteriaI phase scans, and portal venous phase scans. Between the two groups, the image quality scores and image noises and radiation doses were compared. Results The image quality scores in groups A and B showed no statistical difference （P〉0.05）. The image noises had no significant difference in both groups （ P〉0.05）. There were significant difference in radiation doses between groups A and B （ P〈0.01 ）. Conclusion Axial scan and auto mA technique provides adequate image quality without loss of diagnostic information. The radiation dose is much lower than that on the conventional-dose muhi-slice spiral CT examination.

关 键 词：肝癌 腹部 低剂量 计算机体层成像 

分 类 号：R735.7[医药卫生—肿瘤] R814.42[医药卫生—临床医学]