Norbash A M, Busick D, Marks M P
Department of Radiology, Stanford University Medical Center, CA 94305, USA.
AJNR Am J Neuroradiol. 1996 Jan;17(1):41-9.
To limit the side effects of interventional neuroradiologic radiation, such as epilation, by applying a technique involving tube position rotation and by adding a supplemental inexpensive primary beam filter; and to show the dose effect of modifying technical factors.
Combined skin dose from fluoroscopy and digital subtraction angiography was measured with an array of 16 thermoluminescent dosimeters during interventional neuroradiologic procedures in 12 control subjects, in 18 patients whose procedures included addition of an inexpensive primary beam filter (0.5 mm aluminum/0.076 mm copper), and in 10 patients in whom the tube position was rotated, additional primary beam filtration was used, and close attention was paid to technique.
Maximum thermoluminescent dosimetric measurements obtained with existing machine filtration ranged from 0.31 to 2.70 Gy in the control group (mean, 1.51 +/- 0.88); 0.25 to 2.42 Gy in the group with additional filtration alone (mean 0.96 + 0.64; average dose reduction, 36%); and 0.13 to 1.23 Gy in the group with additional filtration, tube position rotation, and close attention to technique (mean, 0.58 +/- 0.34; average dose reduction, 63%). Differences were statistically significant.
Greater than 50% skin dose reductions were documented during interventional neuroradiologic procedures by combining tube position rotation, supplemental primary beam filtration, and technical modifications.
通过应用一种涉及管位旋转的技术并添加一种廉价的初级束滤过器，来限制介入神经放射学辐射的副作用，如脱发；并展示改变技术因素的剂量效应。
在介入神经放射学操作过程中，使用16个热释光剂量计阵列，对12名对照受试者、18名操作中添加了廉价初级束滤过器（0.5毫米铝/0.076毫米铜）的患者以及10名管位旋转、使用了额外初级束滤过并密切关注技术的患者，测量透视和数字减影血管造影的综合皮肤剂量。
在对照组中，使用现有机器滤过时获得的最大热释光剂量测量值范围为0.31至2.70 Gy（平均，1.51±0.88）；仅添加滤过的组为0.25至2.42 Gy（平均0.96 + 0.64；平均剂量降低36%）；添加滤过、管位旋转并密切关注技术的组为0.13至1.23 Gy（平均，0.58±0.34；平均剂量降低63%）。差异具有统计学意义。
在介入神经放射学操作过程中，通过结合管位旋转、补充初级束滤过和技术改进，记录到皮肤剂量降低超过50%。
