目的:我们调查了从事放射学程序的医生的眼睛晶状体的职业剂量。我们评估了遵守新的等效剂量限制的可能性。Further,根据职业健康的基本原则,提出了“多重辐射防护”协议,并对其有效性进行了估计。
方法:本研究包括在日本医疗机构从事放射学操作的医师。使用安装在铅眼镜上的小型放射性光致发光玻璃剂量计测量每个参与者的眼睛晶状体剂量(3毫米剂量当量:Hp(3))。医生被指导进行多种辐射防护措施以评估其有效性。
结果:所有医生的多重辐射防护降低了Hp(3)。特别是,在心血管内科医生和脑血管医生中,Hp(3)从207.7降低到43.2μSv/程序,从21.6降低到10.2μSv/程序,分别,实施后提出多项辐射防护措施。这些措施的剂量减少率为53%(范围:37%-79%)。
结论:如果无线电防护设备和成像条件未得到适当控制,从事放射学程序的医师的眼晶状体所接受的辐射剂量可能超过眼晶状体的剂量限值。然而,根据镜片等效剂量数据,根据职业健康的基本原则实施“多重辐射防护”可以确保遵守新的等效剂量限制,而不会给个别医生或医疗机构带来不必要的负担。
OBJECTIVE: We investigated occupational dose to the lens of the eye for physicians engaged in radiology procedures. We evaluated the potential for compliance with the new-equivalent dose limits to the lens of the eye. Further, a \"multiple radiation protection\" protocol was proposed according to the basic principles of occupational health, and its effectiveness was estimated.
METHODS: Physicians engaged in radiology procedure at medical facilities in Japan were included in this study. The eye lens dose (3-mm dose equivalent: Hp (3)) for each participant was measured using a small radio-photoluminescence glass dosimeter mounted on lead glasses. Physicians were directed to procedure multiple radiation protection measures to evaluate their usefulness.
RESULTS: The Hp (3) was reduced by multiple radiation protection in all physicians. In particular, the Hp (3) reduced from 207.7 to 43.2 μSv/procedure and from 21.6 to 10.2 μSv/procedure in cardiovascular internal physician and cerebrovascular physician, respectively, after the implementation of the proposed multiple radiation protection measures. The dose reduction rate of these measures was 53% (range: 37%-79%).
CONCLUSIONS: The radiation doses received by the eye lenses of physicians engaged in radiology procedure may exceed the dose limits to the lens of the eye if radio-protective equipment and imaging conditions are not properly controlled. However, based on the lens equivalent dose data, the implementation of \"multiple radiation protection\" according to the basic principles of occupational health can ensure compliance with the new-equivalent dose limits to the lens of the eye without placing an undue burden on individual physicians or medical facilities.