Evaluation of radiation dose to the lens in interventional cardiology physicians before and after dose limit regulation changes.

IF 1.4 4区 环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES Journal of Radiological Protection Pub Date : 2024-09-02 DOI:10.1088/1361-6498/ad6f19
Kodai Sagehashi, Yoshihiro Haga, Saki Takahira, Mako Tanabe, Mio Nakamura, Masahiro Sota, Yuji Kaga, Mitsuya Abe, Norio Tada, Koichi Chida
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Abstract

In response to the International Commission on Radiological Protection, which lowered the lens equivalent dose limit, Japan lowered the lens dose limit from 150 mSv y-1to 100 mSv/5 years and 50 mSv y-1, with this new rule taking effect on 1 April 2021. DOSIRIS®is a dosimeter that can accurately measure lens dose. Herein, we investigated lens dose in interventional cardiology physicians 1 year before and after the reduction of the lens dose limit using a neck dosimeter and lens dosimeter measurements. With an increase in the number of cases, both personal dose equivalent at 0.07 mm depth [Hp(0.07), neck dosimeter] and personal dose equivalent at 3 mm depth [Hp(3), lens dosimeter] increased for most of the physicians. The Hp(3) of the lens considering the shielding effect of the Pb glasses using lens dosimeter exceeded 20 mSv y-1for two of the 14 physicians. Protection from radiation dose will become even more important in the future, as these two physicians may experience radiation dose exceeding 100 mSv/5 years. The average dose per procedure increased, but not significantly. There was a strong correlation between the neck dosimeter and lens dosimeter scores, although there was no significant change before and after the lens dose limit was lowered. This correlation was particularly strong for physicians who primarily treated patients. As such, it is possible to infer accurate lens doses from neck doses in physicians who primarily perform diagnostics. However, it is desirable to use a dosimeter that can directly measure Hp(3) because of the high lens dose.

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评估剂量限制规定变更前后介入心脏病学医生的晶状体辐射剂量。
为响应国际辐射防护委员会(ICRP)降低镜片当量剂量限制的要求,日本将镜片剂量限制从 150 mSv/年降低到 100 mSv/5年和 50 mSv/年,新规定于 2021 年 4 月 1 日生效。DOSIRIS® 是一种能准确测量镜片剂量的剂量计。在此,我们使用颈部剂量计和镜片剂量计测量方法,调查了镜片剂量限制降低前后一年介入心脏病学医生的镜片剂量。随着病例数的增加,大多数医生在 0.07 毫米处的个人剂量当量[Hp(0.07),颈部剂量计]和 3 毫米深度处的个人剂量当量[Hp(3),镜片剂量计]都有所增加。考虑到使用镜片剂量计的铅眼镜的屏蔽效果,14 名医生中有两名医生的镜片 Hp(3) 超过了 20 毫西弗/年。未来,辐射剂量防护将变得更加重要,因为这两名医生的辐射剂量可能会超过 100 mSv/5年。每次手术的平均剂量有所增加,但并不明显。颈部剂量计和镜片剂量计得分之间有很强的相关性,尽管在降低镜片剂量限制前后没有明显变化。对于主要治疗患者的医生来说,这种相关性尤其明显。因此,对于主要进行诊断的医生来说,根据颈部剂量推断出准确的镜片剂量是可能的。不过,由于镜片剂量较高,最好使用能直接测量 Hp(3) 的剂量计。
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来源期刊
Journal of Radiological Protection
Journal of Radiological Protection 环境科学-公共卫生、环境卫生与职业卫生
CiteScore
2.60
自引率
26.70%
发文量
137
审稿时长
18-36 weeks
期刊介绍: Journal of Radiological Protection publishes articles on all aspects of radiological protection, including non-ionising as well as ionising radiations. Fields of interest range from research, development and theory to operational matters, education and training. The very wide spectrum of its topics includes: dosimetry, instrument development, specialized measuring techniques, epidemiology, biological effects (in vivo and in vitro) and risk and environmental impact assessments. The journal encourages publication of data and code as well as results.
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