[Accuracy of Setup in Deep-inspiration Breath-hold Irradiation Following Left Mastectomy Using Surface Imaging Guidance].

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI:10.6009/jjrt.25-1538

Minori Tanoue, Norimasa Matsushita, Makoto Sasaki, Takahiro Fujimoto, Manabu Nakata, Yuka Ono, Michio Yoshimura, Takashi Mizowaki

引用次数: 0

Abstract

Purpose: To evaluate the setup accuracy of surface-guided postmastectomy radiotherapy (PMRT) under deep inspiration breath hold (DIBH).

Methods: Fourteen patients with left-sided breast cancer who underwent PMRT under DIBH were enrolled in this study. The setup error was defined as the difference in the position of clinical target volume between the planning computed tomography (CT) and the cone-beam CT acquired after surface-guided setup.

Results: The mean±standard deviation of setup error was 0.2±2.1 mm, -0.1±3.5 mm, and 0.4±2.1 mm in the anterior-posterior, superior-inferior, and right-left directions, respectively, and -0.1±0.8°, 0.5±0.9°, and 0.9±1.0° in the Yaw, Roll, and Pitch angles.

Conclusion: The setup accuracy of PMRT under DIBH using a surface-guided system was within 5 mm in 82% of all treatment fractions.

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[表面成像引导下左乳切除术后深度吸气屏气照射设置的准确性]。

目的：评估深吸气屏气（DIBH）下表面引导的乳腺癌切除术后放射治疗（PMRT）的设置准确性：方法：14 名左侧乳腺癌患者接受了 DIBH 下的表面引导乳腺癌放射治疗。设置误差定义为计划计算机断层扫描（CT）与表面引导设置后获得的锥形束 CT 之间临床靶体积位置的差异：在前后、上下和左右方向上，设置误差的平均值（标准偏差）分别为 0.2±2.1 mm、-0.1±3.5 mm 和 0.4±2.1 mm；在偏航角、滚动角和俯仰角上，设置误差的平均值（标准偏差）分别为 -0.1±0.8°、0.5±0.9° 和 0.9±1.0°：结论：使用表面引导系统在DIBH下进行PMRT治疗，82%的治疗分段的设置精度在5毫米以内。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Nihon Hoshasen Gijutsu Gakkai zasshi

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