Dose advantage of abdominal deep inspiratory breath-hold (aDIBH) in postoperative adjuvant radiotherapy for left breast cancer.

IF 2.1 Q3 ONCOLOGY Journal of the Egyptian National Cancer Institute Pub Date : 2024-09-23 DOI:10.1186/s43046-024-00234-2

Junming Lai, Hui Luo, Shuang Hu, Fangyan Zhong, Rui Chen, Hong Lin

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Abstract

Purpose: We explored the dosimetric efficacy of the abdominal deep inspiration breath hold (aDIBH) technique using an audio-guided device in patients with left breast cancer undergoing postoperative adjuvant radiotherapy compared to free breathing (FB).

Methods: A total of 35 patients with early stage left breast cancer underwent two computed tomography simulation scans each with aDIBH and FB after breast-conserving surgery. Treatment planning was optimized using the Pinnacle³ 9.10 planning system. The heart, left anterior descending coronary artery (LADCA), and left lung was defined as organs at risk (OARs). The dosimetric differences in the planning target volume (PTV) and OARs were compared between aDIBH and FB.

Results: Compared with FB, the heart moved farther caudally and away from the chest wall, and the volume of heart became smaller under aDIBH due to expansion of the lungs. The D mean of the heart, LADCA and left lung of aDIBH were respectively reduced by 332.79 ± 264.61 cGy (P < 0.001), 1290.37 ± 612.09 cGy (P < 0.047) and 69.94 ± 117.73 cGy (P < 0.001). The V20 and V30 of the OARs were also significantly reduced with statistical differences (P < 0.05). In addition, there was no significant difference in the dosimetric parameters of the PTV between the two groups (P > 0.05).

Conclusions: Implementation of the aDIBH technique for postoperative radiotherapy after breast-conserving surgery of the left breast cancer could reduce irradiation of the heart dose, LADCA dose and left lung dose, without compromising target coverage.

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腹部深吸气屏气（aDIBH）在左乳腺癌术后辅助放疗中的剂量优势。

目的：我们探讨了在接受术后辅助放疗的左乳腺癌患者中，使用音频引导装置进行腹部深吸气屏气（aDIBH）技术与自由呼吸（FB）相比的剂量学疗效：共有 35 名早期左侧乳腺癌患者在保乳手术后接受了两次计算机断层扫描模拟扫描，每次扫描都使用了 aDIBH 和 FB。使用 Pinnacle3 9.10 计划系统优化了治疗计划。心脏、左前降支冠状动脉（LADCA）和左肺被定义为危险器官（OARs）。比较了 aDIBH 和 FB 在计划目标体积（PTV）和 OARs 方面的剂量学差异：结果：与 FB 相比，aDIBH 下心脏向尾部移动得更远，远离胸壁，而且由于肺的扩张，心脏体积变小。aDIBH 的心脏、LADCA 和左肺的 D 平均值分别减少了 332.79 ± 264.61 cGy（P 0.05）：结论：在左乳腺癌保乳术后放疗中采用 aDIBH 技术可减少心脏剂量、LADCA 剂量和左肺剂量，同时不影响靶区覆盖。

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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来源期刊

Journal of the Egyptian National Cancer Institute ONCOLOGY-

CiteScore

3.50

自引率

0.00%

发文量

审稿时长

11 weeks

期刊介绍： As the official publication of the National Cancer Institute, Cairo University, the Journal of the Egyptian National Cancer Institute (JENCI) is an open access peer-reviewed journal that publishes on the latest innovations in oncology and thereby, providing academics and clinicians a leading research platform. JENCI welcomes submissions pertaining to all fields of basic, applied and clinical cancer research. Main topics of interest include: local and systemic anticancer therapy (with specific interest on applied cancer research from developing countries); experimental oncology; early cancer detection; randomized trials (including negatives ones); and key emerging fields of personalized medicine, such as molecular pathology, bioinformatics, and biotechnologies.