Three-Dimensional Dosimetry of Mammography Using a Block Cube Breast Phantom and Radiochromic Film
Three-Dimensional Dosimetry of Mammography Using a Block Cube Breast Phantom and Radiochromic Film
复制标题
使用块立方体乳房模型和放射变色胶片进行乳房 X 线摄影的三维剂量测定
DOI：
10.1093/rpd/ncab153
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发表时间：
2021
影响因子：
1
通讯作者：
Masashi Sasaki
中科院分区：
文献类型：
--
作者：
Tatsuhiro Gotanda;Toshizo Katsuda;Hidetoshi Yatake;Yasuyuki Kawaji;Rumi Gotanda;Shinya Imai;Takuya Akagawa;Masashi Sasaki
本研究开发了一种形状与乳房相似的体模，并使用GAFCHROMIC胶片，可以放置在体模内，以测量乳腺X线摄影中详细的乳房剂量分布。将GAFCHROMIC EBT3放置在块状立方体乳房体模上，用乳腺X射线摄影设备照射，以测量体模内水平和深度方向的吸收剂量分布。水平面剂量分布以胸壁侧中心最高，呈扇形下降。沿着体模的深度，整个横截面吸收的剂量在表面处为16.15 mGy，在10、20和30 mm深度处分别为7.51、3.25和1.68 mGy。与平均腺体剂量相比，该方法可以更详细地测量乳腺剂量分布，适用于各种形状的乳腺。
This study developed a phantom with a shape similar to that of the breast and use GAFCHROMIC films that can be placed inside the phantom to measure the detailed breast dose distribution in mammography. GAFCHROMIC EBT3 was placed on the block cube breast phantom and irradiated with a mammography device to measure the absorbed dose distribution inside the phantom in the horizontal and depth directions. The dose distribution in the horizontal plane was the highest in the centre on the chest wall side, and it decreased in a fan shape. Along the depth of the phantom, the doses absorbed across the entire cross-section were 16.15 mGy at the surface and 7.51, 3.25 and 1.68 mGy at depths of 10, 20 and 30 mm, respectively. Compared with the mean glandular dose, the proposed method can measure breast dose distributions in greater detail and is applicable to various breast shapes.