ESTRO 2022 - Abstract Book

S1657

Abstract book

ESTRO 2022

An external supervisor collected and recorded the phone interruptions in the treatment rooms during a regular working day. Additionally, questionnaires were distributed to majority of the clinic personnel including radiation oncologists, medical physicists, radiation technologists, administrators and nurses to further explore potential sources of working interruptions and their impact on burnout (BO), compassion fatigue (CF), compassion satisfaction (CS) and professional quality of life. Two internationally validated questionnaires (Professional Quality of Life Scale, Effort-Reward Imbalance) and a custom-made survey (consisting of 30 items) were used for this evaluation. Results Phone interruptions occurred 26 times during a 6-hour shift at the machine, from which 63% were considered „unnecessary calls”, respectively. The average time for phone calls was 32 seconds (10-120 sec). CF was significantly worse (p=0.05) if „always annoying” background noise and/or ≥ 30 phone rings were present. Physicians had the highest average stress level (1.2), while administrators had the lowest one (0.3). Phone interruptions were nominated among the most frequent stress factors by the physicians. Additional work interruptions occurred due to software, hardware and network problems as well, once weekly on average. Physicians had significantly higher values of BO and CF (p=0.05) compared the other co-workers of the department. Smokers showed increased CS and decreased BO values compared to non-smokers. Conclusion Unnecessary phone calls represented the main source of work interruptions at the treating machines and one of the leading causes of elevated stress level primarily for physicians. Based on this evaluation efforts are planned to reduce avoidable phone calls to improve professional quality of life across all segments of the institution. A. Misiarz 1 , J. Walkiewicz 2 , B. Malesa 1 , J. Trzuskowski 1 , M. Kruszyna-Mochalska 3,4 , B. Pawa ł owski 3 , B. Urba ń ski 4,5 , B. Adamczyk 6 , A. Ryczkowski 3,4 , W. Suchorska 5,4 , P. Mantaj 3 , E. Konstanty 3 , T. Krzyma ń ski 7 , J. Malicki 8,4 1 National Centre for Nuclear Research, Division of Nuclear Equipment HITEC, Otwock, Poland; 2 National Centre for Nuclear Research, Science and Technology Park, Otwock, Poland; 3 Greater Poland Cancer Centre, Medical Physics Department, Pozna ń , Poland; 4 University of Medical Sciences, Electroradiology Department, Pozna ń , Poland; 5 Greater Poland Cancer Centre, Radiobiology Laboratories, Medical Physics Department, Pozna ń , Poland; 6 Greater Poland Cancer Centre, Breast Surgical Oncology Department, Pozna ń , Poland; 7 Greater Poland Cancer Centre, Investment and Renovation Department, Pozna ń , Poland; 8 Greater Poland Cancer Centre, Medical Physics Departmen, Pozna ń , Poland Purpose or Objective The electron therapy combined with surgery is now more often used in radiotherapy. The mobile accelerator is used during surgery in the standard operating room (often without additional radiation shielding). Therefore, it is extremely important to ensure proper radiological protection of the patient and staff. The aim of the study was a detailed analysis of the air kerma value around the new mobile linear accelerator for IOERT (AQURE from National Centre for Nuclear Research) and on its basis issuing recommendations for its safe use in an operating room not equipped with additional radiological protection. Materials and Methods The radiation study to determine the leakage and scatter of photons consisted of measurements of the air kerma at points shown in Figure 1 at 3 heights from the ground: 0, 102, and 150cm. Additionally, the kerma was measured above the accelerator head in the beam axis (260 cm from the ground) and centrally in the beam axis at the floor level. Measurements were made using a 30ccm cylindrical ion chamber (PTW Freiburg) with a 6cm plaster cylinder-shaped cover (density 2,3 g/ccm). The reference dose given at the maximum dose point in the beam axis in the water for each point was 10 Gy (1000 MU). Measurements were made on the AQURE (NCNR, Poland) accelerator for 9 MeV energy electron beam. Then, based on the results obtained, it will be possible to estimate the exposure time (minutes per year) for the staff (behind the 6 cm plaster wall) outside the operating room. These staff were divided into three groups: general population (limit dose of 1 mSv per year), category B workers - 6 mSv, and category A workers - 20 mSv. PO-1870 Safe use of the AQURE – the new mobile accelerator for IOERT based on air kerma measurement

Results The results of the equivalent dose calculation on the basis of the measurements are presented in Table 1.