Development of dedicated phantom for end-to-end testing of multiple image-guidance configurations incorporating light-section-based surface guidance system.

IF 2 4区 医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Naoki Hayashi, Tatsunori Saito, Kazuki Ouchi, Hiroshi Amma, Yuta Muraki, Keisuke Yasui, Masashi Nozue
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引用次数: 0

Abstract

Purpose: Radiotherapy devices with multiple image-guidance systems, such as surface-guided radiation therapy (SGRT), have been widely used in recent years. However, in the case of SGRT devices using the light-section method, coordinate coincidence evaluation using a phantom for SGRT devices with patterned light projection is not appropriate. Hence, this study aims to develop a dedicated phantom able to evaluate both the detection accuracy and coordinate coincidence of multiple IGRT configurations, including light-section-based SGRT devices.

Materials and method: First, we developed an end-to-end (E2E) phantom that can be scanned by CT and detected by a light-section-method-based SGRT device. Second, the detection accuracy of the phantom under three reference data acquisition conditions was evaluated using the E2E phantom. The three conditions were a body surface image detected by VOXELAN in the simulation CT room, a body surface image reconstructed from the volume data of the simulation CT room, and a body surface image acquired by VOXELAN in the radiotherapy room. Finally, the coordinate coincidence of the image-guidance system was evaluated using the E2E phantom.

Result: Upon comparing detection accuracy among the three reference data acquisition methods, we found that the reference data generated in the CT room had the largest error (0.58 mm at maximum). The coordinate coincidences of the multiple image-guidance systems were within 1 mm for all components after the maintenance of VOXELAN using E2E phantom. Furthermore, the long-term direction stability was worse in the longitudinal direction.

Conclusion: The new E2E phantom can be used to evaluate the detection accuracy of a light-section-based SGRT system and the coordinate coincidence using a Winston-Lutz-based method in multiple image-guided configurations. The detection accuracy in the three different reference images of VOXELAN using this phantom improved to within 1 mm in all directions.

开发专用模型,用于端到端测试多种图像引导配置,包括基于光截面的表面引导系统。
目的:近年来,表面引导放射治疗(SGRT)等具有多个图像引导系统的放射治疗设备得到了广泛应用。然而,对于使用光截面法的 SGRT 设备,使用具有图案光投射的 SGRT 设备模型进行坐标重合评估并不合适。因此,本研究旨在开发一种专用模型,能够评估多种 IGRT 配置(包括基于光截面的 SGRT 设备)的检测准确性和坐标重合度:首先,我们开发了一个端到端(E2E)模型,该模型可通过 CT 扫描,并由基于光截面方法的 SGRT 设备检测。其次,使用 E2E 模体评估了三种参考数据采集条件下的检测精度。这三种条件分别是 VOXELAN 在模拟 CT 室检测到的体表图像、根据模拟 CT 室的容积数据重建的体表图像以及 VOXELAN 在放疗室获取的体表图像。最后,使用 E2E 模型对图像导航系统的坐标重合度进行了评估:结果:比较三种参考数据采集方法的检测精度后,我们发现在 CT 室生成的参考数据误差最大(最大为 0.58 毫米)。使用 E2E 模型维护 VOXELAN 后,多个图像导航系统所有组件的坐标重合度均在 1 毫米以内。此外,纵向方向的长期方向稳定性较差:新的 E2E 模型可用于评估基于光切面的 SGRT 系统的检测精度,以及在多种图像引导配置中使用基于 Winston-Lutz 方法的坐标重合度。使用该模型对 VOXELAN 的三个不同参考图像进行检测,其检测精度在所有方向上都提高到了 1 毫米以内。
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来源期刊
CiteScore
3.60
自引率
19.00%
发文量
331
审稿时长
3 months
期刊介绍: Journal of Applied Clinical Medical Physics is an international Open Access publication dedicated to clinical medical physics. JACMP welcomes original contributions dealing with all aspects of medical physics from scientists working in the clinical medical physics around the world. JACMP accepts only online submission. JACMP will publish: -Original Contributions: Peer-reviewed, investigations that represent new and significant contributions to the field. Recommended word count: up to 7500. -Review Articles: Reviews of major areas or sub-areas in the field of clinical medical physics. These articles may be of any length and are peer reviewed. -Technical Notes: These should be no longer than 3000 words, including key references. -Letters to the Editor: Comments on papers published in JACMP or on any other matters of interest to clinical medical physics. These should not be more than 1250 (including the literature) and their publication is only based on the decision of the editor, who occasionally asks experts on the merit of the contents. -Book Reviews: The editorial office solicits Book Reviews. -Announcements of Forthcoming Meetings: The Editor may provide notice of forthcoming meetings, course offerings, and other events relevant to clinical medical physics. -Parallel Opposed Editorial: We welcome topics relevant to clinical practice and medical physics profession. The contents can be controversial debate or opposed aspects of an issue. One author argues for the position and the other against. Each side of the debate contains an opening statement up to 800 words, followed by a rebuttal up to 500 words. Readers interested in participating in this series should contact the moderator with a proposed title and a short description of the topic
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