Gosch D, Kurze W, Deckert F, Schulz T, Patz A, Kahn T
Klinik und Poliklinik für Diagnostische und Interventionelle Radiologie, Universitätsklinikum Leipzig AöR.
Rofo. 2006 Sep;178(9):880-5. doi: 10.1055/s-2006-926955.
Determination and comparison of radiation exposure for examinations of the skull with unsubtracted 3D Rotational Angiography (3D RA) and 2D Digital Subtraction Angiography (2D DSA).
Measurements were carried out with a skull of an Alderson phantom for 3D RA and for 2D DSA in p. a. and lateral projections using an Innova 4100 angiography system with a digital flat panel detector from GE Healthcare. 45 thermoluminescent dosimeters TLD 100H from Harshaw were placed inside the phantom to measure organ doses. In addition the dose area product was recorded and the effective dose was calculated using the Monte Carlo program PCXMC.
For a biplanar DSA run (lateral and p. a. projection), the organ doses were 4 to 5 times higher and the effective dose was 4 times higher than for a 3D RA even though the number of images for the two DSA runs was only half of that for 3D RA.
The radiation exposure for unsubtracted 3D RA using a flat panel detector is significantly lower than for biplanar DSA. Using 3D RA in place of 2D DSA can reduce the radiation exposure of patients in neuroradiology procedures.
测定并比较使用未减影三维旋转血管造影（3D RA）和二维数字减影血管造影（2D DSA）进行颅骨检查时的辐射剂量。
使用GE医疗的带有数字平板探测器的Innova 4100血管造影系统，对Alderson体模颅骨进行3D RA及正位和侧位投影的2D DSA测量。将45个来自哈肖的热释光剂量计TLD 100H放置在体模内以测量器官剂量。此外，记录剂量面积乘积并使用蒙特卡罗程序PCXMC计算有效剂量。
对于双平面DSA检查（侧位和正位投影），尽管两次DSA检查的图像数量仅为3D RA的一半，但器官剂量高出4至5倍，有效剂量高出4倍。
使用平板探测器的未减影3D RA的辐射剂量显著低于双平面DSA。在神经放射学检查中，用3D RA替代2D DSA可降低患者的辐射剂量。
