Belotta Alexandra F, Mayer Monique N, Waldner Cheryl L, Sidhu Narinder P, Robinson Kate A, Carmalt James L, Freitas Fernando P, Koehncke Niels K
Department of Small Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada.
Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada.
Am J Vet Res. 2022 Mar 3;83(5):412-418. doi: 10.2460/ajvr.21.08.0134.
The objectives of this study were to investigate scattered radiation doses to the hands of equine workers holding the cassette and the x-ray tube by hand, for both limb and vertebral column studies, and to compare the scattered radiation attenuation of lead with radiation protection lead-free gloves. Radiation doses to the hands of the cassette holder in the primary beam were also investigated.
A whole-body horse cadaver.
A portable x-ray unit was used to simulate 6 radiographic study types in the horse cadaver. Doses were measured with no shielding and, for cassette holders, with the ion chamber enclosed in a lead glove and a lead-free glove. Thirty exposures were performed for each study view and condition (n = 1,920).
Mean scattered doses to x-ray unit operators were higher than doses to cassette holders for ungula (hoof), thoracic vertebrae, and lumbar vertebrae studies, whereas doses to cassette holders were higher than doses to x-ray tube operators for studies of the metacarpophalangeal joint (fetlock) and tarsus (hock). Doses did not differ for the stifle joint. Mean percentage decrease in scattered radiation dose was 99.58% with lead gloves and 98.9% with lead-free gloves.
X-ray tube operators can be exposed to equal or higher scattered radiation doses to the hand as cassette holders. Lead-free hand shielding should only be considered as an alternative to lead gloves if their lighter weight increases frequency of use by workers.
本研究的目的是调查在进行四肢和脊柱研究时，手持暗盒和X射线管的马匹工作人员手部所接受的散射线剂量，并比较铅制与无铅辐射防护手套对散射线的衰减情况。同时还研究了位于原发射线中的暗盒持有者手部所接受的辐射剂量。
一匹完整的马尸体。
使用便携式X射线设备在马尸体上模拟6种放射学研究类型。在无防护的情况下进行剂量测量，对于暗盒持有者，将电离室分别置于铅手套和无铅手套中进行剂量测量。每种研究视图和条件下进行30次曝光（n = 1920）。
在进行蹄、胸椎和腰椎研究时，X射线设备操作人员手部所接受的平均散射线剂量高于暗盒持有者；而在进行掌指关节（系关节）和跗关节（飞节）研究时，暗盒持有者手部所接受的剂量高于X射线管操作人员。膝关节研究中剂量无差异。使用铅手套时，散射线剂量平均降低百分比为99.58%，使用无铅手套时为98.9%。
X射线管操作人员手部所接受的散射线剂量可能与暗盒持有者相当或更高。只有当无铅手部防护用品重量更轻能提高工作人员的使用频率时，才应将其视为铅手套的替代品。
