ESTRO 2024 - Abstract Book

S3118

Physics - Autosegmentation

ESTRO 2024

Keywords: automatic contouring, guidelines

References:

[1] B. V. Offersen et al., “The role of ESTRO guidelines in achieving consistency and quality in clinical radiation oncology practice,” Radiotherapy and Oncology, vol. 179, p. 109446, Feb. 2023, doi: 10.1016/j.radonc.2022.109446.

[2] D. Lin et al., “A Systematic Review of Contouring Guidelines in Radiation Oncology: Analysis of Frequency, Methodology, and Delivery of Consensus Recommendations,” International Journal of Radiation Oncology*Biology*Physics, vol. 107, no. 4, pp. 827–835, Jul. 2020, doi: 10.1016/j.ijrobp.2020.04.011. [3] W. A. Hall et al., “NRG Oncology updated international consensus atlas on pelvic lymph node volumes for intact and post-operative prostate cancer,” International Journal of Radiation Oncology*Biology*Physics, vol. 108, no. 3, pp. S64–S65, Nov. 2020, doi: 10.1016/j.ijrobp.2020.07.2198. [4] C. Salembier et al., “ESTRO ACROP consensus guideline on CT- and MRI-based target volume delineation for primary radiation therapy of localized prostate cancer,” Radiotherapy and Oncology, vol. 127, no. 1, pp. 49–61, Apr. 2018, doi: 10.1016/j.radonc.2018.01.014.

2603

Digital Poster

Onet: Contrast-enhanced CT assisted automatic clinical target volume delineation of prostate cancer

Luping Wan 1 , Yin Jiang 1 , Hao Wu 2 , Wei Zhao 1

1 Beihang University, Physics School, Beijing, China. 2 Peking University Cancer Hospital, Radiation Oncology, Beijing, China

Purpose/Objective:

Contrast-enhanced CT (CECT) plays a pivotal role in tumor radiotherapy. In response to clinical demands, our study aims to develop an innovative method for delineating the clinical target volume (CTV)in prostate cancer radiotherapy using CECT imaging.

Material/Methods:

The study encompassed a cohort of 30 patients (training set) and 11 patients (test set) who underwent volumetric modulated arc therapy (VMAT) radiotherapy for prostate cancer. Notably, these patients had not undergone prostatectomy procedures, and the CTV encompassed the prostate gland. Each patient included both a standard plain CT scan, a CECT scan and associated CTV contouring information. The plain CT images were acquired in the scanning bed inward phase, while the CECT images were acquired in the scanning bed outwards phase. After completing the plain CT scan, intravenous iodine contrast agent was administered to obtain the CECT. We commenced the CTV