摘要
目的探讨局减法和全减法对头颈CT血管成像(CTA)图像质量及辐射剂量的影响。方法选取2022年8月至2023年4月医院收治的90例疑似脑动脉瘤或脑梗的患者,按扫描范围分为A、B两组。A组(45例)为局减组,B组(45例)为全减组,根据图像质量评分将图像分为优、良、差3级,比较两组图像质量及辐射剂量。结果两组均能获得减影像,两组图像均能满足临床诊断要求,两组图像质量之间差异无统计学意义(χ2=0.155,P>0.05)。A组图像辐射剂量低于B组(t=6.834,P=0.041)。结论局减法可保证图像质量,同时也能降低辐射剂量。
Objective To investigate the effects of focal subtraction and total subtraction on the image quality and radiation dose of head and neck CT angiography(CTA).Methods Ninety patients with suspected cerebral aneurysm or cerebral infarction admitted the hospital from August 2022 to April 2023 were selected and divided into group A and group B by scanning range.Group A(45 cases)were local subtraction group and group B(45 cases)were total subtraction group,and the images were classified into excellent,good and poor by image quality score,and the image quality and the radiation dose of two groups were compared.Results Minus images were obtained in both groups,and the images could meet the clinical diagnosis requirements,and there was no statistical difference between the image quality of the two groups(χ2=0.295,P>0.05).The dose of the images of group A was lower than that in group B(t=6.834,P=0.041).Conclusion The local subtraction method can ensure the image quality,and reduce the radiation dose.
作者
张红伟
张云翔
ZHANG Hongwei;ZHANG Yunxiang(Department of Medical Imaging,Henan Provincial People’s Hospital,Zhengzhou 450000,China)
出处
《河南医学研究》
CAS
2024年第8期1373-1376,共4页
Henan Medical Research
关键词
头颈CT血管成像
辐射剂量
局减法
head and neck CT angiography
radiation dose
local subtraction technique
