Zhang Wei-Guo, Liu Jia-Ping, Jia Xiu-Qin, Zhang Ji-Yang, Li Xiang-Nan, Yang Qi
Department of Radiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100020, People's Republic of China.
Department of Radiology, Beijing Xiongke Hospital, Capital Medical University, Beijing, 100049, People's Republic of China.
Int J Gen Med. 2021 Mar 25;14:1033-1039. doi: 10.2147/IJGM.S293173. eCollection 2021.
This study aimed to investigate the effects of the Sn100 kVp tube voltage mode on the image quality and radiation dose of computed tomography pulmonary angiography (CTPA).
A total of 145 patients who underwent CTPA were randomly divided into five groups: control group (120 kVp, 150 mAs), test group A (Sn100 kVp, 270 mAs), test group B (120 kVp, 30 mAs), test group C (70 kVp, 150 mAs), and test group D (80 kVp, 70 mAs). After image post-processing, the image quality and radiation dose of each group were analyzed.
The computed tomography values of images in the four test groups were more than 250 HU, which met the criteria for diagnosis. The signal-to-noise ratio and contrast-to-noise ratio of the images in the four test groups were lower than those in the control group. The radiation dose in each test group was lower than in the control group. The radiation dose was lowest in test group A.
The Sn100 kVp energy spectrum purification protocol can meet the requirements for clinical diagnosis, ensure image quality, and reduce the dose of radiation that patients receive.
本研究旨在探讨100 kVp锡滤过管电压模式对计算机断层扫描肺动脉造影（CTPA）图像质量和辐射剂量的影响。
将145例行CTPA检查的患者随机分为五组：对照组（120 kVp，150 mAs）、试验组A（100 kVp锡滤过，270 mAs）、试验组B（120 kVp，30 mAs）、试验组C（70 kVp，150 mAs）和试验组D（80 kVp，70 mAs）。图像后处理后，分析各组的图像质量和辐射剂量。
四个试验组图像的计算机断层扫描值均大于250 HU，符合诊断标准。四个试验组图像的信噪比和对比噪声比均低于对照组。各试验组的辐射剂量均低于对照组。试验组A的辐射剂量最低。
100 kVp能量谱纯化方案可满足临床诊断要求，保证图像质量，降低患者接受的辐射剂量。
