Medical Physics Department, AUSL Piacenza, via Taverna 49, 29121 Piacenza, Italy.
Orthopaedics and Traumatology Department, AUSL Piacenza, via Taverna 49, 29121 Piacenza, Italy.
Radiat Prot Dosimetry. 2020 Jul 13;189(2):157-162. doi: 10.1093/rpd/ncaa026.
Data were collected from 642 orthopaedic interventions during which the images produced by X-rays were recorded. By examining these images, it is possible to determine the time that the orthopaedic surgeons' hands were exposed to the direct radiation beam. The procedures with greater exposure to the direct beam were those involving the hand (median 15 s) and the wrist (median 13 s). Two surgeons wore a ring to measure the absorbed dose at the fingers: one on the dominant hand and the other on the non-dominant hand. The two surgeons performed 34 and 48 operations, respectively, in 14 months. The total doses measured with the rings were 2.30 and 1.04 mSv, respectively. The images of the interventions were examined, determining how much each individual hand was exposed. The interventional reference point (IRPeff (left or right)) was calculated by comparing the doses at the IRP with the exposure times of the right or the left hand. Summing the IRPeff of the two surgeons in 14 months, it is obtained the maximum values of 2.87 mGy for the left hand of one and 6.74 mGy for the right hand of the other, which are of the order of 1/100 of the annual dose limit for the extremities.
从 642 例骨科介入手术中收集了 X 射线成像的资料。通过检查这些图像，可以确定骨科医生的手暴露在直接射束下的时间。手部（中位数 15 秒）和腕部（中位数 13 秒）的手术暴露时间更长。两名外科医生佩戴指环以测量手指的吸收剂量：一只戴在优势手上，另一只戴在非优势手上。这两名外科医生在 14 个月内分别进行了 34 次和 48 次手术。指环测量的总剂量分别为 2.30 和 1.04 mSv。检查手术干预的图像，确定每个手的暴露程度。通过比较 IRP 的剂量与右手或左手的暴露时间，计算出介入参考点（IRPeff（左或右））。将两名外科医生在 14 个月内的 IRPeff 相加，得到了一名医生左手的最大值为 2.87 mGy，另一名医生右手的最大值为 6.74 mGy，均为四肢年剂量限值的 1/100 左右。
