Khafaji Mawya, Albadawi Ghaidaa H
Radiology, King Abdulaziz University Faculty of Medicine, Jeddah, SAU.
Dentistry, King Abdulaziz University, Jeddah, SAU.
Cureus. 2023 Aug 8;15(8):e43113. doi: 10.7759/cureus.43113. eCollection 2023 Aug.
Cone-beam computed tomography (CBCT) is a tool for dental imaging of impactions, maxillofacial discrepancies, facial trauma, and tumors. In addition, It is used in treatment planning for dental implants, orthognathic surgery, and general maxillofacial surgery. There are no standardized methods for utilizing CBCT dosimetry, and there is no consensus among dental and medical physics health professionals regarding dental CBCT imaging procedures. The eyes and thyroid glands are radiosensitive organs that lie outside the primary beam but receive a significant amount of radiation due to scattered radiation. This study aimed to assess the dose to eye lens in patients imaged using CBCT. This review aims to evaluate the scattered doses to the eye from CBCT among adult patients seeking dental treatment. The search included published articles in the Web of Science, PubMed (MeSH and Web PubMed), Medline, and Google Scholar databases using the appropriate keywords from January 2010 to July 2022. The inclusion criteria were based on the method of dose measurement (phantom studies using Optically stimulated luminescence (OSL) and Thermoluminescent dosimeter (TLD), language, and type of protocol used. A literature search was performed using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses checklist and flow chart. Out of 653 articles identified, 5 met the inclusion criteria. The results show that the scattered radiation dose ranged between 0.103 mSv and 8.3 mSv. This variation exists due to the difference in the field of vision (FOV), phantom exposure, dosimeters used, degree of rotation in the protocol, and finally, the scanner used. The scattered dose to the eye from CBCT is higher than the background radiation, with huge variability in the range of the dose measured. Clear guidelines for utilizing CBCT should be implemented, and dose reference levels should be established for benchmarking and optimization in practice.
锥形束计算机断层扫描（CBCT）是一种用于牙阻生、颌面部差异、面部创伤和肿瘤的牙科成像工具。此外，它还用于牙种植体、正颌外科手术和一般颌面外科手术的治疗计划。目前尚无利用CBCT剂量测定的标准化方法，牙科和医学物理健康专业人员在牙科CBCT成像程序方面也未达成共识。眼睛和甲状腺是位于原射线束之外的放射敏感器官，但由于散射辐射会受到大量辐射。本研究旨在评估使用CBCT成像的患者晶状体所接受的剂量。本综述旨在评估寻求牙科治疗的成年患者中CBCT对眼睛的散射剂量。检索范围包括2010年1月至2022年7月在科学网、PubMed（医学主题词和网络PubMed）、Medline和谷歌学术数据库中使用适当关键词发表的文章。纳入标准基于剂量测量方法（使用光激发发光（OSL）和热释光剂量计（TLD）的体模研究）、语言和所使用的方案类型。使用系统评价和Meta分析的首选报告项目清单和流程图进行文献检索。在识别出的653篇文章中，有5篇符合纳入标准。结果表明，散射辐射剂量在0.103 mSv至8.3 mSv之间。这种差异的存在是由于视野（FOV）、体模曝光、所使用的剂量计、方案中的旋转程度以及最终所使用的扫描仪的不同。CBCT对眼睛的散射剂量高于背景辐射，在所测量的剂量范围内存在巨大差异。应实施关于使用CBCT的明确指南，并建立剂量参考水平，以便在实践中进行基准测试和优化。
