Jordan L K, Floyd C E, Lo J Y, Ravin C E
Department of Radiology, Duke University Medical Center, Durham, NC 27710.
Radiology. 1993 Jul;188(1):215-8. doi: 10.1148/radiology.188.1.8511301.
Scatter fractions (SFs) measured in patients undergoing erect posteroanterior (PA) and lateral chest radiography with a 12:1 antiscatter grid are reported. Modifications to the posterior beam-stop (PBS) technique allowed measurement of scatter in these patients, without altering the diagnostic image and without additional radiation exposure. The SF measurements are reported by anatomic location on 42 clinical chest images. Average SF values ranged from 0.27 to 0.90 on lateral radiographs and from 0.27 to 0.68 on PA radiographs. Scatter measurements with the 12:1 grid were found to be greater than estimates from previous PA chest phantom experiments. To the authors' knowledge, they were the first to measure radiation scatter with the PBS technique in patients undergoing PA and lateral chest radiography with the antiscatter grid.
报告了在接受立位后前位（PA）和侧位胸部X线摄影且使用12:1反散射栅格的患者中测量的散射分数（SFs）。对后束阻挡（PBS）技术的改进使得能够在不改变诊断图像且无额外辐射暴露的情况下测量这些患者的散射。SF测量结果按解剖位置报告于42张临床胸部图像上。侧位X线片上的平均SF值范围为0.27至0.90，PA位X线片上的平均SF值范围为0.27至0.68。发现使用12:1栅格的散射测量值大于先前PA胸部体模实验的估计值。据作者所知，他们是首个在接受PA和侧位胸部X线摄影且使用反散射栅格的患者中采用PBS技术测量辐射散射的。
