ESTRO meets Asia 2024 - Abstract Book

S406

RTT – Treatment planning, OAR and target definitions

ESTRO meets Asia 2024

1. Yan M, Louie AV, Kotecha R, Ashfaq Ahmed M, Zhang Z, Guckenberger M, et al. Stereotactic body radiotherapy for Ultra-Central lung Tumors: A systematic review and Meta-Analysis and International Stereotactic Radiosurgery Society practice guidelines. Lung cancer (Amsterdam, Netherlands). 2023;182:107281-. 2. Guillaume E, Tanguy R, Ayadi M, Claude L, Sotton S, Moncharmont C, et al. Toxicity and efficacy of stereotactic body radiotherapy for ultra-central lung tumours: a single institution real life experience. British journal of radiology. 2022;95(1129):20210533-. 3. Li GJ, Tan H, Nusrat H, Chen H, Chang JH, Shahi J, et al. Safety and Efficacy of Stereotactic Body Radiotherapy for Ultra-Central Thoracic Tumors. International journal of radiation oncology, biology, physics. 2023;117(2):e35 e6. 4. Kong F-MMDPD, Ritter TPD, Quint DJMD, Senan SMD, Gaspar LEMD, Komaki RUMD, et al. Consideration of Dose Limits for Organs at Risk of Thoracic Radiotherapy: Atlas for Lung, Proximal Bronchial Tree, Esophagus, Spinal Cord, Ribs, and Brachial Plexus. International journal of radiation oncology, biology, physics. 2011;81(5):1442-57. 5. Habermann F-NOJ, Schmitt D, Failing T, Ziegler DA, Fischer J, Fischer LA, et al. And Yet It Moves: Clinical Outcomes and Motion Management in Stereotactic Body Radiation Therapy (SBRT) of Centrally Located Non-Small Cell Lung Cancer (NSCLC): Shedding Light on the Internal Organ at Risk Volume (IRV) Concept. Cancers. 2024;16(1):231. 6. Nardone V, Giugliano FM, Reginelli A, Sangiovanni A, Mormile M, Iadanza L, et al. 4D CT analysis of organs at risk (OARs) in stereotactic radiotherapy. Radiotherapy and oncology. 2020;151:10-4. 7. Ng CKC, Leung VWS, Hung RHM. Clinical Evaluation of Deep Learning and Atlas-Based Auto-Contouring for Head and Neck Radiation Therapy. Applied sciences. 2022;12(22):11681.

386

Digital Poster

Difference in the Incidence of RP in Elderly NSCLC Patients between VMAT & IMRT: a Prospective Study

Rongyao Fang 1,2 , Ningping Xiao 1,2 , Wenhui Lu 1,2 , Albert Abdilim 1,2 , Zhengda pei 1,2 , Tingjie Yu 1,2 , Jiayu Xiang 1,2 , Yihui Zhang 1,2 , Jie Dai 1,2 , Yi JIn 1 , Hekun Jin 1 , pei Yang 1 1 Department of Radiation Oncology, Hunan Cancer Hospital, the Affiliated Hospital of Xiangya School of Medicine, Changsha, China. 2 Graduate Collaborative Training Base of Hunan Cancer Hospital, University of South China, Hengyang, China

Purpose/Objective:

This study intends to compare the incidence of radiation pneumonitis and survival outcomes of patients treated with the two techniques in the elderly. patients, to be able to provide some reference value to clinicians when deciding on the mode of radiotherapy for middle- to late-stage elderly patients with non-small cell lung cancer.

Material/Methods:

This project collected data from 68 elderly patients, 64 males, and 4 females, diagnosed with definite non-small cell lung cancer at Hunan Cancer Hospital between July 2017 and November 2020, and recorded that real-world patients chose the VMAT and IMRT groups for radiotherapy. Staging was performed according to the American Joint Committee on Cancer (AJCC 8th). Clinical symptoms and treatment of patients during radiotherapy were recorded Radiation pneumonitis was evaluated according to CTCAE4.0 and followed up.SPSS software was applied for data entry, organization, and statistical analysis.