低电压扫描技术应用于CT血管成像对患者受检辐射剂量的影响

Effect of Low-Voltage Scanning Technique on Radiation Dose of CT Angiography

目的探讨在CT血管成像CTA检查中应用低电压(100KV)扫描技术对患者受检辐射剂量减少的临床意义。方法选取2011年6月至2015年12月到本院进行CTA检查的300例患者,随机分成A组134例和B组166例。A组为低电压组(100 kV),B组为常规电压组(120 kV)。管电流均为450 mAs。比较两组的CTA对患者辐射剂量及血管图像质量。结果两组图像质量均能满足诊断要求。A组辐射剂量明显低于B组(P <0.05)。结论 CTA成像采用低电压在保证图像质量前提下可以有效减低患者辐射剂量。

Objective To investigate the clinical significance of low voltage(100 KV)scanning technique in CT angiography for reducing radiation dose. Methods TA total of 300 patients admitted to our hospital for CTA examination from June 2011 to December 2015 were randomly divided into group A(134 cases) and group B(166 cases). Group A is the low voltage group(100 kV), and group B is the normal voltage group(120 kV).and tube current was 450 m As. The radiation dose and vascular image quality of CTA were compared between the two groups. Results Both groups of images could meet the diagnosis requirements. The radiation dose of group A was significantly lower than that of group B(P<0.05). Conclusion CTA imaging with low voltage can effectively reduce the radiation dose of patients under the premise of ensuring image quality.