超高分辨率计算机断层扫描对宫颈癌远程后装系统质量保证的潜在作用。

IF 1.9 4区 医学 Q2 BIOLOGY
Masashi Kinjyo, Akihiro Nishie, Ryo Kudaka, Shota Nakano, Takuro Ariga
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引用次数: 0

摘要

宫颈癌根治性放射治疗的一部分是使用远程后装载系统(RALS)进行腔内近距离放射治疗。放射源通过放置在子宫或阴道内的涂抹器直接输送。彻底的质量控制对于防止可能导致严重辐照错误的事故非常重要,而涂抹器检查就是这样一种质量控制措施。我们在临床上遇到过这样的情况:在治疗计划 CT 上观察到灭菌后的涂抹器腔内有少量积水。虽然浸没测试呈阴性,敷贴器也没有气泡冒出,但超高分辨计算机断层扫描(U-HRCT)显示敷贴器内侧出现了一条线状裂缝。超高分辨率计算机断层扫描(U-HRCT)的空间分辨率低于 U-HRCT,但在治疗计划 CT 上却没有发现这一异常。此外,在其他 8 个无损伤涂药器的 U-HRCT 图像上也未发现线性裂纹。U-HRCT 在检测涂药器损伤方面可能具有更高的潜力,可用于 RALS 程序的质量保证。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A potential usefulness of ultra-high-resolution computed tomography in quality assurance of remote after-loading system for cervical cancer.

Intracavitary brachytherapy with a remote after-loading system (RALS) is performed as a part of radical radiation therapy in cervical cancer. The radiation source is delivered directly through an applicator placed inside the uterus or vagina. Thorough quality control is important to prevent accidents that can lead to serious irradiation error, and an applicator check is one such quality control measure. We experienced a clinical situation in which a small volume of water was observed in the lumen of a post-sterilized applicator on treatment-planning CT. Although the submersion test was negative and no air bubbles emerged from the applicator, ultra-high-resolution computed tomography (U-HRCT) showed a linear crack reaching the inside of the applicator. This abnormality was not identified on treatment-planning CT, which has lower spatial resolution than U-HRCT. In addition, no linear cracks were seen on U-HRCT images of eight other applicators considered to be free from damage. U-HRCT may have superior potential to detect applicator damage and could be useful for quality assurance of the RALS procedure.

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来源期刊
CiteScore
3.60
自引率
5.00%
发文量
86
审稿时长
4-8 weeks
期刊介绍: The Journal of Radiation Research (JRR) is an official journal of The Japanese Radiation Research Society (JRRS), and the Japanese Society for Radiation Oncology (JASTRO). Since its launch in 1960 as the official journal of the JRRS, the journal has published scientific articles in radiation science in biology, chemistry, physics, epidemiology, and environmental sciences. JRR broadened its scope to include oncology in 2009, when JASTRO partnered with the JRRS to publish the journal. Articles considered fall into two broad categories: Oncology & Medicine - including all aspects of research with patients that impacts on the treatment of cancer using radiation. Papers which cover related radiation therapies, radiation dosimetry, and those describing the basis for treatment methods including techniques, are also welcomed. Clinical case reports are not acceptable. Radiation Research - basic science studies of radiation effects on livings in the area of physics, chemistry, biology, epidemiology and environmental sciences. Please be advised that JRR does not accept any papers of pure physics or chemistry. The journal is bimonthly, and is edited and published by the JRR Editorial Committee.
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