ESTRO 2023 - Abstract Book

S1422

Digital Posters

ESTRO 2023

Figure 2. Example Database for AutoQA. Blu line corresponds to vertical field trend for 10cm × 10cm field of 10 FFF MV beam. Conclusion AutoQA module significantly reduces the time spent for QA. A shorter time is a fundamental advantage especially in a department with a considerable workload and insufficient machine time. AutoQA also allows to get more quantitative data, to keep track of linacs' performance, and delete the user-dependent uncertainties. Machine QA Database offers the great advantage of being able to examine the trend for each test to know if the linacs need important technical interventions.

PO-1708 E2E testing based on alanine and IC dosimetry for a new combination of TCS/OIS & PBS proton gantry

P. Roisl 1 , H. Palmans 2,3 , M. Schafasand 4,5 , J. Hopfgartner 2 , M. Stock 6,7 , A. Carlino 2

1 EBG MedAustron GmbH, Medical Physics, Wiener Neustadt, Austria; 2 EBG MedAustron, Medical Physics, Wiener Neustadt, Austria; 3 National Physics Laboratory NPL, Institute of Physics, London, United Kingdom; 4 EBG MedAustron Gmbh, PhD Student Medical Physics, Wiener Neustadt, Austria; 5 Medical University of Vienna, PhD Student, Vienna, Austria; 6 EBG MedAustron Gmbh, Medical Physics, Wiener Neustadt, Austria; 7 Karl Landsteiner University of Health Sciences, Medical Physics, Wiener Neustadt, Austria Purpose or Objective At MedAustron a new pencil beam scanning (PBS) proton gantry has been installed in combination with the newly developed Treatment Control System (TCS) RayCommand v2B SP2 and the Oncology Information System (OIS) RayCare v5A (RaySearch Laboratories, Sweden). The clinical implementation required comprehensive end-to-end (E2E) testing to ensure safe patient treatments. This work reports on functional and dosimetric E2E test procedures for protons based on customized phantoms and different dosimetric techniques. Materials and Methods A homogeneous polystyrene phantom and two anthropomorphic phantoms (pelvis and head phantom) were adapted to hold different detectors.1 All treatment planning steps were performed with RayStation v11BSP1. The E2E tests were administered in RayCare and all treatment plans finally executed in RayCommand. First, image guided patient positioning was performed using the clinical RayCommand treatment workflow. Afterwards the plans were delivered to the phantoms which were loaded with alanine pellets (measurements of dose distribution) (figure 1) or a Farmer chamber (measurement of the dose at reference point) and additional gafchromic films. The alanine pellets and their read-out were provided by the National Physical Laboratory (NPL) in UK. Evaluation of the measurement results was performed according to Carlino et al, 2018 (1).