Agard E T, Ehlers G, Kirchberg S
Health Phys. 1985 Apr;48(4):447-51. doi: 10.1097/00004032-198504000-00007.
The levels of scattered radiation doses imparted to the eyes, thyroid and gonads of pediatric patients treated with orthovoltage radiation (300 kVp, 2.0 mmCu HVL) and with a 4-MV linear accelerator, were determined by making thermoluminescent dosimeter (TLD) measurements in three paraffin phantoms of different sizes. These phantoms were made from molds of mannequins used for store display, of approximate heights 30", 40" and 50", representing children of ages 1-2, 4-5 and 8-10 yr, respectively. The sites chosen for irradiation were (1) the whole brain, (2) the chest, (3) the kidney bed, (4) the whole abdomen and (5) the spinal column. These sites are normally treated in such pediatric malignancies as medulloblastoma, neuroblastoma and Wilms' tumor. Some of the doses measured are less than 10 rad for an entire treatment regimen, and would therefore be categorized as low-level doses. Where radiation was the only mode of treatment for long-term survivors of such malignancies, especially those treated 20-30 yr ago with orthovoltage radiation, useful data may be extracted for contributing to our knowledge about the long-term effects of low levels of radiation.
通过在三个不同尺寸的石蜡模型中进行热释光剂量计（TLD）测量，确定了接受正交电压辐射（300 kVp，2.0 mmCu半价层）和4兆伏直线加速器治疗的儿科患者眼睛、甲状腺和性腺所接受的散射辐射剂量水平。这些模型由用于商店展示的人体模型模具制成，高度约为30英寸、40英寸和50英寸，分别代表1 - 2岁、4 - 5岁和8 - 10岁的儿童。选择的照射部位为：（1）全脑，（2）胸部，（3）肾床，（4）全腹，（5）脊柱。这些部位通常用于治疗髓母细胞瘤、神经母细胞瘤和肾母细胞瘤等儿科恶性肿瘤。所测量的一些剂量在整个治疗方案中小于10拉德，因此可归类为低水平剂量。对于这些恶性肿瘤的长期存活者，特别是那些20 - 30年前接受正交电压辐射治疗的患者，如果放疗是唯一的治疗方式，那么可以提取有用的数据，以增进我们对低水平辐射长期影响的了解。
