ESTRO 2021 Abstract Book

S535

ESTRO 2021

SP-0666 Distracting techniques for paediatric/AYA/adult radiotherapy L. Claude 1 1 Centre Léon Bérard, Radiation Oncology , Lyon, France

Abstract Text Each radiotherapy fraction requires immobilization with often impressive device for the patient and isolation in a treatment room. Sometimes stress can induce difficulties or even impossibility of delivering the treatment in good conditions, especially in young children or in case of older children or adults in particular conditions (pain, claustrophobia, comprehension difficulties…). In young children, even though general anesthesia is effective and has proof of safety for the necessary immobilization during radiotherapy sessions, it stays a timely and costly method on which we know little about the consequences on the long run of repeated use in childhood. An alternative is the use of appropriate information and preparation procedures including rituals and/or hypnosis to avoid general anesthesia as often as possible. In adolescent and adult, a multifaceted approach can also be used to allow radiation delivery. During this session, a literature review and an experienced-based presentation will be proposed, regarding the different distracting techniques (rituals, hypnosis, psychological preparation, virtual reality use...) which may help children or adults patients during radiation treatment. SP-0667 The Medical Device Regulation (EU 2017/745) and its implications for (your own) medical hard and software E. Roelofs 1 1 MAASTRO, Medical Physics, Maastricht, The Netherlands Abstract Text The new Medical Device Regulation ( MDR, EU 2017/745 ), which is effective as of May 26 th this year, is one of two European regulations (the other being about in vitro diagnostic devices) that replace the previous directives and their national implementations. This session discusses the most important changes and their implications for clinical institutions when introducing and using medical technology. Furthermore, restrictions on and increased documentation of in-house development of medical tools or systems are discussed in more detail, as this is quite common in the field of Radiotherapy (e.g. spreadsheets, scripting against the TPS, your own nifty registration software, 3D-printing, modifying existing technology). The MDR also affects the way research can be performed with non-CE-marked (e.g. your own) medical technology and how clinical trials should be set up. Some practical tips will be provided on how to comply to the new regulations and how to reduce some of the negative impact on innovation in the field. Teaching lecture: The medical device regulation and its implications for (your own) medical hard and software

Teaching lecture: Physics perspective of stereotactic cardiac ablation

SP-0668 Physics perspective of stereotactic cardiac ablation O. Blanck 1 1 University Medical Center Schleswig-Holstein, Department of Radiation Oncology, Kiel, Germany Abstract Text Stereotactic Body Radiotherapy (SBRT) for cardiac arrythmias, also called cardiac radioablation (CR), is a new and promising therapy for patients with refractory ventricular tachycardia (VT) and potentially atrial fibrillation (AF). CR presents unique clinical and technical challenges and close interdisciplinary collaboration and interaction between cardiology and radiation oncology is paramount to perform safe and effective treatments. Medical physics plays an important role in tackling these new challenges and could function as a bridge for the different physical, technical and biological perspectives in the respective specialties. In the past 15 years, numerous pre-clinical studies have investigated the possible application of focused radiation to the heart to treat arrythmias using photon and particle beams and a large variety of technical equipment and treatment methods. Worldwide, more than 100 VT and 5 AF patients have been treated with CR with various target lesions, dose distributions and motion management strategies mainly using photons with different robotic, c-arm, and MRI linear accelerators. Recently, the first case using proton radiotherapy for CR was reported. Today, more than 60 treatments have been presented in clinical-trial, case-series and case- report publications and recently were summarized together with comprehensive pre-clinical work in several systematic and narrative reviews [1,2]. Besides different technical and clinical solutions for CR, we also find large variations in patient selection, treatment outcome with respect to efficacy and toxicity and reporting of