ESTRO 38 Abstract book

S67 ESTRO 38

treatment couch. The impact of this method to reduce stress and anxiety by cognitive distraction, the acceptance by the patients and further the reduction of daily sedations shall be investigated in this work. Materials and Method In the pilot study between July 2017 and May 2018 the Video-Assisted Immobilisation during external beam RadioTherapy (VAIRT) was offered to all patients below the age of 18 years. The compliance of patients was identified during the preparation process for the radiotherapy treatment. If they were able keep calm during the head-immobilisation mask-preparation and/or CT simulation while watching the short video sequence, the radiation treatment at the LINAC can be performed without daily sedation. Involving the medical staff (Radiology Therapist- RTTs, Radiation Oncologists and Medical Physicists) during the briefing of assistant family member is necessary for the successful implementation of this method of immobilisation in young patients. Results Thirty-eight patients (24 male, 14 female) with a median age of 8 years [from 1 to 18 years] were treated during the pilot study period at the department of radiotherapy. Twenty out of 38 (52%) 7 [3-14] years were successfully cognitive distracted by movies during treatment so that no daily sedation and presence of an anaesthesiologist were needed. Of the remaining patients 13 (34%) at the age of 14 years [8-18] refused to watch any movie while five (13%) at 2 [1-7] year age had to be sedated during treatment. By the introduction of the VAIRT method in the radiotherapy department an increase of 50% of young patients who do not need a daily sedation was observed. Conclusion The Video-Assist-Immobilisation method was successfully implemented in the clinical routine for patients below the age of 18 years. For the success of the VAIRT a professional briefing of the patient, relatives and all professional staff involved in the treatment is essential. Reducing sedation during radiation therapy, allows a meaningful handling of resources in saving time (30 min per fraction) and costs (2800€) per patient and treatment. The VAIRT can also be used in adult patients who are stressed and anxious during head-mask preparation and treatment. PV-0139 Endorectal HDR brachytherapy boost with MRI guidance for non operative management of rectal cancer R. Engineer 1 , A. Saklani 2 , A. D'Souza 2 , A. Baheti 3 , M. Patil 1 , S. Chopra 1 , P. Patil 4 1 Tata Memorial Hospital, Radiation Oncology, Mumbai, India; 2 Tata Memorial Hospital, Surgical Oncology, Mumbai, India; 3 Tata Memorial Hospital, Radlogy, Purpose or Objective In this study we evaluated the role of endorectal brachytherapy as a boost to escalate radiotherapy dose to achieve clinicoradiological complete response leading to organ preservation. Material and Methods This pilot study consisted of consecutive patients with T2- 4 N0-2 M0 distal rectal cancer (within 6 cm from anal verge) treated with radical intent neoadjuvant chemotherapy (NACTRT) between October 2017 and May 2018. External beam radiotherapy consisted of 3D-CRT (4 field) or IMRT to a dose of 50Gy (1.8 to 2 Gy per fractions), to the primary and nodal regions along with daily capecitabine (825mg/msq). Response at conclusion was evaluated by digital per rectal examination (DRE) and those with a residual ulcerative disease and no greater than three-fourth circumferential involvement were Mumbai, India ; 4 Tata Memorial Hospital, Gastrointestinal Oncology, Mumbai, India Poster Viewing: Poster viewing 3: Brachytherapy

population. There may also be a role for an Advanced Practice RT in late effects clinics. SP-0137 Radiotherapy in children and adolescents. What do we know until now and what will the future bring? T. Boterberg 1 1 Ghent University Hospital, Radiation Oncology, Gent, Belgium Abstract text Cancer in children and adolescents is rare and at the same time characterized by a wide variety of tumour types, often different from the common adult cancers. Over the past decades, paediatric cancer treatment results have improved significantly: up to 80% of children and adolescents with cancer are currently cured of their disease, although survival figures for the individual cancers vary significantly. This is mainly the result of multi-modality treatment protocols including chemotherapy, surgery, and biological treatment, in addition to selective use of more sophisticated radiotherapy techniques. In addition to that, a better knowledge of molecular characteristics has lead to an increasing personalisation of treatment based on risk stratification, which has allowed to further improve cure rates with a reduction in treatment-related morbidity. This is especially important for radiotherapy as treatment modality since almost every organ system is subject to some late effects caused by radiotherapy, in addition to the risk of developing secondary cancers. However, we should take into account that there is a significant variation in frequency of these long-term complications. They are more determined by the affected site, the irradiated volume, the age at time of treatment and the dose given than by the original tumour type treated. Obviously, interaction with chemotherapy may also play a role and should also be taken into consideration. The significant increase in paediatric cancer cure rate over the past years has also increased the number of cancer survivors at risk for developing late effects. While with the passing of time, the risks of cancer relapse recede, monitoring for late effects of treatment becomes more important as they can, as mentioned, affect any body system. The majority of patients will have some form of long-term sequelae, some minor, some major and some that can be ameliorated by timely intervention. Therefor it is strongly recommended that patients should be followed in a multidisciplinary clinic. A detailed treatment summary will help to predict the risk of complications and should guide this long-term follow- up. Finally, increasingly more sophisticated and well- targeted radiotherapy techniques should allow to further minimise the risk of late effects, but that too is still to be investigated and examined long after treatment has finished. SP-0138 (VAIRT) Video-Assisted Immobilisation during external beam RadioTherapy for Children N. Ritt 1 1 Universitätsklinik für Strahlentherapie, Brachytherapie, Wien, Austria (VAIRT) Video-Assisted Immobilisation during external beam RadioTherapy for Children Authors: N. Ritt, S. Hofstätter, A. Osztavics, B. Wisgrill, C. Chao, D. Berger ,K. Dieckmann Purpose and Objective The aim of the pilot study at the Department of Radiotherapy at the Medical University of Vienna (General Hospital of Vienna) was to reduce the number of daily sedations, (which were necessary to keep the patient in treatment position during their radiotherapy fraction) including the presence of anaesthesiologist for children and young patient undergoing EBRT. Therefore, a short cartoon is shown on tablets, to the child lying on the