ESTRO 2022 - Abstract Book

S868

Abstract book

ESTRO 2022

3. Strategies to increase student placement capacity (including simulation and non-traditional placements) 4. Placement allocation and funding support 5. Standardised clinical assessment documentation 6. Preparation for practice (including preceptorship)

Conclusion Each priority area of the toolkit is populated with examples that includes:

• Recruitment initiatives e.g. department open days, podcasts, virtual tours • Examples of buddy schemes and peer support programmes, non traditional placements including research, management, professional body internships. Examples of innovative working patterns to increase student training capacity • Simulation strategies and practical examples • Example templates to support students to secure placement accommodation • Initiatives from other professional groups that have implemented standardised assessments in clinical practice. • Transition to professional practice initiatives and preceptorship examples The ASPIRRE toolkit enables a wide target audience to access a range of resources to be able to continue to develop new and existing ideas for supporting recruitment and retention initiatives, explore placement expansion and transformation agendas within radiotherapy. Examples can be added to ensure an up to date repository of current and future practice trends can be maintained. The transferable nature of the toolkit means it can be adapted by other healthcare professional groups. C. DE LA PINTA 1 , M. Valero 1 , E. Pinto 2 , V. Duque 1 , L. Pelari 1 , F. López Mesa 1 , E. Centelles 1 , M.E. Hernando 2 , B. Iñigo 2 , E. Fernández-Lizarbe 1 , E. Canales 3 , R. García-LaTorre 3 , M. Garví 4 , V. Pino 4 , S. Sancho García 1 1 Ramón y Cajal Hospital, Radiation Oncology, Madrid, Spain; 2 Universidad Politécnica de Madrid, Madrid, Spain, Bioengineering and Telemedicine Centre, Madrid, Spain; 3 Ramón y Cajal Hospital, Radiology, Madrid, Spain; 4 Ramón y Cajal Hospital, Radiation Therapist, Madrid, Spain Purpose or Objective Resident training depends on the volume of patients in the training center. A pilot contouring training program for residents has been implemented in our center. This program consists of several contouring modules by pathology. Our study shows the first data obtained from the program comparing the delineation of GTV of non-spinal bone metastases on MRI and CT. Materials and Methods After institutional review boards approved the study, we analyzed anonymized CT and MRI scans obtained from nine non- spinal bone metastases. Five radiation oncology residents at our center used CT and MRI to delineate nine GTVs of non- spinal bone metastases. The locations of the non-spinal bone metastases were pelvis and skull. The cases show different characteristics: blastic and lytic metastases, different primaries (lung, breast, prostate, rectum and urothelial). GTV volumes on CT and MRI were compared. The concordance index according to Landis and Koch was evaluated. Results The median GTV volume was 3.01 cc on CT (0.076-79.14 cc), while on MRI it was 45.17 cc (0.1-75.12 cc). The interobserver variance and standard deviation in CT were lower than in MRI (674.3 vs. 834.1, and 25.97 vs. 28.88, respectively). The concordance index was slight (0.2) between CT and MRI in all patients. If we divide the residents into first and second year and compare them with third- and fourth-year residents, the median GTV volume on MRI was 51.23 and 42.69 cc in group 1 and 2 (p=0.018), versus 2.32 cc and 3.78 on CT in group 1 and 2 (p=0.022). The variance and standard deviation among observers in group 2 in CT and MRI were lower than in group 1 (780.80 vs. 619.62, and 27.94 vs. 24.89 respectively). The agreement index was moderate (0.53 and 0.51) between CT and MRI by groups. Conclusion This study demonstrates the evolving learning curve of physicians in training. This curve will improve if residents have at their disposal a regulated and contoured training plan with expert supervision. We observed a great difference in the contour between CT and MRI by proposing a specific MRI study module within the training program PO-1033 Learning curve of residents of a radiation oncology service in a training program.

PO-1034 A national program for the implementation of lung Stereotactic Ablative Body Radiotherapy (SABR)

P. Diez 1 , A. Haridass 2 , J. Lilley 3 , R. Patel 1 , E. Miles 1 , A. Tree 4,5 , C. Clark 6,7 , C. Dean 8 , K. Fell 9 , F. McDonald 10

1 National Radiotherapy Trials Quality Assurance Group, Mount Vernon Cancer Centre, Radiotherapy Physics, Northwood, United Kingdom; 2 Clatterbridge Cancer Centre, Clinical Oncology, Liverpool, United Kingdom; 3 Leeds Teaching Hospitals NHS Trust, Radiotherapy Physics, Leeds, United Kingdom; 4 The Royal Marsden NHS Foundation Trust, Department of Urology, Sutton, United Kingdom; 5 Institute of Cancer Research, Division of Radiotherapy and Imaging, Sutton, United Kingdom; 6 National Physical Laboratory, Metrology for Medical Physics, Teddington, United Kingdom; 7 UCLH NHS Foundation Trust, Radiotherapy Physics, London, United Kingdom; 8 Barts Health NHS Trust, Radiotherapy Physics, London, United Kingdom; 9 NHS England and NHS Improvement, Cancer Programme of Care, Specialised Commissioning, London, United Kingdom; 10 The Royal Marsden NHS Foundation Trust, Lung Unit, London, United Kingdom