在做头部CT时,用铅遮挡眼晶状体是否有益?

IF 1.4 4区 医学 Q4 ENVIRONMENTAL SCIENCES Radioprotection Pub Date : 2023-07-01 DOI:10.1051/radiopro/2023014
F.F. Alqahtani, M.K. Saeed, Y. Abdallah, K. Alshamrani
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引用次数: 0

摘要

眼睛的晶状体是对辐射敏感的器官之一。接受头部计算机断层扫描(CT)扫描的患者,以及反复进行头部CT扫描的患者,都有发生这种后果的风险。这项研究的目的是观察在常规的颅脑CT中,铅当量是否可以减少到达晶状体的辐射。通过首先使用带铅屏蔽和不带铅屏蔽的幻影测量来评估图像质量,从而确定患者应用的理想屏蔽厚度,从而实现了目标。使用liff热释光剂量计量化无、有一层、两层和三层铅屏蔽的ATOM模型的眼晶状体的入口表面剂量(ESDs)。根据ACR CT幻影的研究,可以使用定制的铅屏蔽,厚度可达0.1毫米,而不会对中央和后部区域的图像质量产生明显影响。在这些实验中,0.1毫米厚的铅屏蔽层可将眼睛晶状体的esd降低31%。眼罩显著降低了前部区域的图像质量,但在中央和后部区域仅略有降低。鉴于上述情况,使用改良铅屏蔽可以大大降低剂量的镜头,而不会严重影响图像质量。
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Would lead shielding the eye lenses during a head CT be beneficial?
The lens of the eye is one of the radiosensitive organs. Patients receiving computed tomography (CT) scanning of the head, as well as patients undergoing repeated CT scanning of the head, are at risk for this consequence. The goal of this study was to see if a lead equivalent might reduce radiation reaching the eye’s lens during regular cranial CT. The goal was accomplished by determining the ideal shielding thickness for patient applications by first evaluating the image quality using phantom measurements taken with and without lead shielding. LiF-thermoluminescent dosimeters were used to quantify the entrance surface doses (ESDs) to the eye lenses of the ATOM phantom without, with one, two, and three layers of lead shielding. The use of customized lead shields up to 0.1 mm thick might be used, according to ACR CT Phantom studies, without having a noticeable impact on the image quality for the central and posterior areas. In these experiments, 0.1 mm thick lead shielding reduces ESDs to the eye’s lens by 31%. Eye shields significantly reduced image quality in the anterior region, but just slightly in the centre and posterior regions. Given the foregoing, using modified lead shields could drastically lower dose to the lens without severely affecting image quality.
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来源期刊
Radioprotection
Radioprotection ENVIRONMENTAL SCIENCES-PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH
CiteScore
3.30
自引率
54.50%
发文量
35
审稿时长
>12 weeks
期刊介绍: Radioprotection 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 (theoretical and practical aspects): dosimetry, instrument development, specialized measuring techniques, epidemiology, biological effects (in vivo and in vitro) and risk and environmental impact assessments.
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