Department of Disaster Medicine, Fukushima Medical University Hospital, Fukushima, Japan.
Department of Radiology, Fukushima Medical University Hospital, Fukushima, Japan.
Radiol Phys Technol. 2023 Dec;16(4):560-568. doi: 10.1007/s12194-023-00742-1. Epub 2023 Sep 21.
The purpose was to investigate air-kerma area product (P) and entrance surface air-kerma rate ([Formula: see text]) on the effect of the shape of automatic dose rate control (ADRC) in the presence of a wedge compensation filter. We compared and evaluated the variability of the X-ray output using a combination of wedge compensation filters and the ADRC. Two ADRC shapes (round and square) and three poly-methyl-methacrylate thicknesses (15, 20, and 25 cm) were used. A wedge compensation filter was inserted 2 cm at a time, up to 6 cm. When the wedge compensation filter was inserted to 6 cm for 20 cm of poly-methyl-methacrylate, the X-ray output fluctuated significantly. The P was reduced by 39% when the wedge compensation filter was inserted to 6 cm and by 59% when it was inserted to 4 cm under round-type for 20 cm poly-methyl-methacrylate. The shape of the ADRC affects [Formula: see text] and P.
目的是研究在存在楔形补偿滤光片的情况下自动剂量率控制（ADRC）的形状对空气比释动能面积乘积（P）和入射体表空气比释动能率（[Formula: see text]）的影响。我们比较和评估了使用楔形补偿滤光片和 ADRC 的组合对 X 射线输出的变化。使用了两种 ADRC 形状（圆形和方形）和三种聚甲基丙烯酸甲酯厚度（15、20 和 25cm）。楔形补偿滤光片每次插入 2cm，最多插入 6cm。当楔形补偿滤光片插入 20cm 聚甲基丙烯酸甲酯的 6cm 时，X 射线输出波动很大。当楔形补偿滤光片插入 6cm 时，P 降低了 39%，当楔形补偿滤光片插入 4cm 时，圆形 ADRC 下 20cm 聚甲基丙烯酸甲酯的 P 降低了 59%。ADRC 的形状会影响[Formula: see text]和 P。
