Radiation doses of medical radiation workers performing low-dose-rate brachytherapy with 198Au grains and 192Ir pins for patients with oral cancers

IF 1.6 3区医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Oral Radiology Pub Date : 2023-12-18 DOI:10.1007/s11282-023-00728-0

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Abstract

Objectives

Low-dose-rate brachytherapy (LDR-BT) with ¹⁹⁸Au grains and ¹⁹²Ir pins is an essential treatment option for oral cancer due to its high rate of local control and low invasiveness. However, the radiation exposure of medical radiation workers is concerning. Thus, we aimed to determine the radiation dose delivered to medical radiation workers during LDR-BT using ¹⁹⁸Au grains and ¹⁹²Ir pins for oral cancer.

Methods

Thirty-two patients with oral cancer underwent ¹⁹⁸Au grain interstitial LDR-BT between June 2016 and May 2023, and 23 patients with tongue cancer underwent ¹⁹²Ir pin interstitial LDR-BT between March 2015 and November 2017 at our hospital. Dosimetry was performed by attaching a dosimeter to the chest pocket of the operator and assistant during ¹⁹⁸Au grain or ¹⁹²Ir pin LDR-BT. Since the operator also loads ¹⁹⁸Au grains into the implantation device, the operator’s radiation dose includes the dose received during this preparation.

Results

Mean radiation doses of the operators with ¹⁹⁸Au grain and ¹⁹²Ir pin LDR-BT were 165.8 and 211.2 μSv, respectively. Statistically significant differences between the radioactive sources of ¹⁹⁸Au grain and ¹⁹²Ir pin LDR-BT were observed (p = 0.0459). The mean radiation doses of the assistants with ¹⁹⁸Au grain and ¹⁹²Ir pin LDR-BT were 92.0 and 162.0 μSv, respectively. Statistically significant differences were observed between the radioactive sources of ¹⁹⁸Au grains and ¹⁹²Ir pin LDR-BT (p = 0.0003).

Conclusions

Regarding radioactive source differences, ¹⁹²Ir pin LDR-BT resulted in higher doses delivered to medical radiation workers than ¹⁹⁸Au grain LDR-BT.

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使用 198Au 粒和 192Ir 栓为口腔癌患者进行低剂量率近距离放射治疗的医疗放射工作人员的辐射剂量

摘要使用 198Au 粒和 192Ir 栓的低剂量近距离放射治疗（LDR-BT）因其局部控制率高和创伤小而成为口腔癌治疗的重要选择。然而，医疗放射工作人员所受到的辐射量令人担忧。因此，我们旨在确定使用 198Au 粒和 192Ir 针进行 LDR-BT 治疗口腔癌时医疗放射工作人员所受的辐射剂量。方法在 2016 年 6 月至 2023 年 5 月期间，32 名口腔癌患者在我院接受了 198Au 粒间质 LDR-BT；在 2015 年 3 月至 2017 年 11 月期间，23 名舌癌患者在我院接受了 192Ir 针间质 LDR-BT。在 198Au 粒或 192Ir 针 LDR-BT 过程中，通过在操作者和助手的胸袋上安装一个剂量计来进行剂量测定。由于操作者也要将 198Au 晶粒装入植入装置，因此操作者的辐射剂量包括在准备过程中接受的剂量。结果操作者使用 198Au 晶粒和 192Ir 针 LDR-BT 的平均辐射剂量分别为 165.8 和 211.2 μSv。198Au 晶粒和 192Ir 针式 LDR-BT 放射源之间的差异具有统计学意义（p = 0.0459）。使用 198Au 晶粒和 192Ir 针状 LDR-BT 的助手的平均辐射剂量分别为 92.0 和 162.0 μSv。198Au 晶粒和 192Ir 针式 LDR-BT 的放射源之间存在明显的统计学差异（p = 0.0003）。结论在放射源差异方面，192Ir 针式窄带热辐射比 198Au 粒式窄带热辐射对医用辐射工作人员造成的剂量更高。

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来源期刊

Oral Radiology DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

4.20

自引率

13.60%

发文量

审稿时长

>12 weeks

期刊介绍： As the official English-language journal of the Japanese Society for Oral and Maxillofacial Radiology and the Asian Academy of Oral and Maxillofacial Radiology, Oral Radiology is intended to be a forum for international collaboration in head and neck diagnostic imaging and all related fields. Oral Radiology features cutting-edge research papers, review articles, case reports, and technical notes from both the clinical and experimental fields. As membership in the Society is not a prerequisite, contributions are welcome from researchers and clinicians worldwide.