基于ATCM技术的不同探测器宽度对头颈CT血管成像图像质量与辐射剂量影响的研究

Study on the Effect of Different Detector Widths Based on ATCM Technology of Head and Neck CT Angiography Image Quality and Radiation Exposure

目的基于自动管电流调制(Automatic Tube Current Modulation,ATCM)技术探讨不同探测器宽度对头颈CT血管成像(CT Angiography,CTA)图像质量和辐射剂量的影响。方法选取2022年6月至2023年5月于阳光融和医院就诊的共120例头颈CTA检查图像资料和临床资料为研究对象,将其按照不同探测器宽度分为A组(40 mm)和B组(80 mm),A组60例,B组60例,其中体重正常、超重、肥胖患者各20例,分别比较不同探测器宽度扫描条件下的图像质量及其辐射剂量。结果不同探测器宽度下正常、超重、肥胖患者头颈图像质量-噪声比差异均无统计学意义(P>0.05);不同探测器宽度下体重正常、超重、肥胖患者头颈图像质量-CT值差异均无统计学意义(P>0.05);40 mm探测器宽度螺旋扫描体重正常、超重、肥胖患者的剂量长度乘积均低于80 mm探测器宽度螺旋扫描,差异有统计学意义(P<0.05)。结论基于ATCM技术选择40 mm探测器宽度可保证头颈CTA图像质量,同时减少辐射剂量。

Objective To explore the effect of different detector widths based on automatic tube current modulation(ATCM)technology on the image quality and radiation exposure of head and neck CT angiography(CTA).Methods A total of 120 cases of head and neck CTA examination images and clinical data who visited Sunshine Union Hospital from June 2022 to May 2023 were selected.According to the different detector widths,they were divided into group A(40 mm)and group B(80 mm),with 60 cases in each group.There were 20 cases of patients with normal weight,overweight,and obese patients respectively.The image quality and radiation dose of the two groups were compared under different detector widths scanning conditions.Results There was no statistically significant difference in the head and neck image quality noise ratio among normal weight,overweight,and obese patients under different detector widths(P>0.05);There was no statistically significant difference in the head and neck image quality CT value ratio among normal weight,overweight,and obese patients under different detector widths(P>0.05);The dose length product of normal,overweight,and obese patients with 40 mm detector width spiral scanning was lower than that of 80 mm detector width spiral scanning,and the difference was statistically significant(P<0.05).Conclusion Selection of 40 mm detector width based on ATCM can ensure the image quality of head and neck CTA and reduce radiation exposure.