ESTRO 2024 - Abstract Book

S5520

RTT - Patient care, preparation, immobilisation and IGRT verification protocols

ESTRO 2024

5mm in all directions in our department. The setup of stream 3 showed promising reproducibility with <1mm translation offset in average and the most incidence rate of translation deviation falling within the robustness.

No statistical significance was found in rotational deviations among three setups, where numerically, stream 2 had the least and stream 1 had the largest offset. Although stream 2 had the least rotational offset, Valcok would locate and obstruct the lateral opposing beam path for prostate proton therapy. Without a significant difference in rotational offset, Vaclok is less favorable because of the likelihood of increasing the dose and range uncertainty. To conclude, indexed knee support and foot support used in stream 3 is the most appropriate setup for prostate proton therapy.

Keywords: prostate proton therapy, femoral heads, setups

1183

Digital Poster

Breath-hold home training for DIBH-RT: Preliminary results from a single-arm prospective study

Muhammad Fairuz Jumee, Bryan Shihan Ho, Li Hoon Liyun Lim, Eileen Yi Lin Huang, Harraine Geronimo Soriano, Emily Yu Xuan Nancy Caluraud, Bryan Ju Meng Ong

National Cancer Centre Singapore, Division of Radiation Oncology, Singapore, Singapore

Purpose/Objective:

Despite studies showing the benefits of Deep-Inspiration Breath Hold (DIBH) radiotherapy for patients with left breast cancer, not all patients are suitable as patients must be able to clearly visualise the interface through the video glasses, follow instructions and synchronise their breathing, hold their breath for approximately 25 seconds, breathe using their mouth through a mouthpiece, maintain consistent position with each breath-hold, and maintain consistent breathing patterns. Based on a single institution experience, all criteria listed above are critical to ensure treatment reproducibility and minimise complications during treatment delivery. Historical data collected between January to June 2022 revealed only 23.7% of left breast cancer patients were eligible for DIBH technique. While the use of an information sheet and educational video has been previously explored and shown to reduce DIBH procedure simulation duration[1], there is currently no evidence to investigate the impact of the provision of home practice training materials on the DIBH eligibility rate for left breast cancer patients. The aim of this study is to report the impact of breath-hold home training on patient’s eligibility for spirometry-based DIBH radiotherapy.

Material/Methods:

Left breast cancer patients who are referred for DIBH radiotherapy are consecutively and conveniently enrolled. Recruited patients were given a set of training materials (patient education booklet, link to breath-hold training videos, and nose clip) during their first consultation. Self-administered surveys were also given to patients upon signing consent, prior to their DIBH Eligibility Session, and CT Simulation procedure to evaluate their procedural anxiety, need-for-information, home-training compliance, and patient satisfaction.