ESTRO 2023 - Abstract Book

S572

Monday 15 May 2023

ESTRO 2023

Teaching Lecture: FAIR data management in radiation biology and radiation oncology research

SP-0677 FAIR data management in radiation biology and radiation oncology research L. Slater United Kingdom

Abstract not available

Teaching Lecture: Future-proofing radiotherapy access: The fine balance between preferences and sustainability

SP-0678 Future-proofing radiotherapy access: The fine balance between preferences and sustainability Y. Lievens Belgium

Abstract not available

Teaching Lecture: Modern radiotherapy techniques in skin cancer

SP-0679 Modern radiotherapy techniques in skin cancer E. Barnes 1 1 Odette Cancer Centre, Radiation Oncology, Toronto, Canada

Abstract Text Skin cancer is the most common cancer worldwide, and incidence rates are rising due to the aging population and ultraviolet light exposure. While most commonly seen in the head and neck area, lesions can present anywhere on the body and a wide variety of radiotherapy modalities (kilovoltage, electrons, photons, brachytherapy) and techniques can be used to optimise treatment delivery and outcomes. This talk will provide an update on the modern radiotherapy techniques used in the management of skin cancer, both external beam radiotherapy and brachytherapy. Advances in imaging and treatment planning have led to the ability to deliver highly conformal external beam treatment plans with volumetric modulated arc therapy (VMAT). The role of stereotactic body radiotherapy (SBRT) in skin cancer will be reviewed. Discussion on brachytherapy will focus on emerging technologies such as electronic brachytherapy and image guided superficial brachytherapy. Advances in 3D printing have allowed the generation of custom moulds which can conform to irregular skin surfaces and be used to deliver elegant treatment plans for superficial targets. Clinical scenarios for treatment of skin cancers with these modern radiotherapy techniques will be presented.

Teaching Lecture: Integration of radiotherapy into new therapeutic algorithms for lymphomas

SP-0680 Integration of radiotherapy into new therapeutic algorithms for lymphomas N.G. Mikhaeel United Kingdom

Abstract not available

Teaching Lecture: Justification and dose optimisation in IGRT practices

SP-0681 Justification and dose optimisation in IGRT practices G. Ntentas 1 1 Guy's and St Thomas' NHS Foundation Trust, Medical Physics, London, United Kingdom

Abstract Text The utilisation of daily cone-beam computed tomography (CBCT) for radiotherapy treatment verification has increased due to the wider application of image-guided radiotherapy (IGRT) and expansion in dose-escalation, hypofractionation and reduced margins. Linear Accelerators come with default scanning parameters for their CBCT devices which are not always optimised in terms of radiation dose and/or image quality. This can lead to exposing patients to unnecessary amounts of radiation imaging dose or provide suboptimal image quality during treatment which can lead to image verification uncertainties and repeated scans. Efforts to reduce the imaging dose where possible whilst maintaining treatment verification accuracy, or increase dose if necessary to increase image quality should be encouraged. Close involvement of Radiographers (RTTS) in the assessment on image quality is crucial. The rapid changes in radiotherapy technologies, planning techniques and fractionation regimes require frequent re-evaluation of imagining scanning parameters such as mAs, KV energy, and gantry speed, frequency of scans, justification process and clinical audits. Optimisation of imaging in radiotherapy should be a dynamic process that reflect the continuously changing radiotherapy landscape."

Teaching Lecture: Voxel-based modelling for NTCP predictions: State-of-the-art methodology and beyond

SP-0682 Voxel-based modelling for NTCP predictions: State-of-the-art methodology and beyond A. McWilliam 1 1 The University of Manchester, Division of Cancer Sciences, Manchester, United Kingdom