ESTRO 2021 Abstract Book

S425

ESTRO 2021

Wilcoxon signed-rank test was used to analyse the significance in displacement of the rectum, bladder and TOU between planning CT scans and daily CBCT scans. Spearman’s rank-order correlation was then used to analyse significance of the association of changes in rectum and bladder with the displacement of the TOU from planning CT scans to daily CBCT scans. Results 14 initial planning CT scans and 346 CBCT scans were analysed. Significant interfractional changes in rectum volume, rectum position, bladder volume and TOU position were determined between planning CT scans and daily CBCT scans. Associations between interfractional changes of rectum and bladder with TOU displacement were suggested to be patient specific. Weak relations were found - between increase in rectal diameter and increase in TOU distance from S1 (rs=0.22 p value<0.0.1); - between increase in SI bladder diameter and increase in TOU distance from pelvic inlet plane (rs=0.30 p value<0.01) - between increase in AP bladder diameter and increase in TOU distance from S1 (rs=0.33 p value<0.01) Moderately positive associations were found - between the increase in AP bladder diameter and increase in TOU distance from pelvic inlet plane (rs=-0.449 p value<0.01) - between increase in SI bladder diameter and TOU distance from S1 vertebrae, (rs=-0.449 p value<0.01) Conclusion The findings of this study highlight that better strategies to ensure reproducible rectal volume and position in EBRT of cervical cancer are required. Patient specific relation between interfractional changes of the rectum and bladder with TOU displacement reinforce the importance of individualised internal target volume (ITV) margins and online daily image guided radiation therapy (IGRT).

Symposium: Make the best use of online resources and meetings for remote (net)working

SP-0538 Starting a networking group in a virtual environment M. Aznar United Kingdom

Abstract not available

SP-0539 Conducting research and teaching remotely J. Dhont Belgium

Abstract not available

SP-0540 Working from home - Yay M. Chamberlain Switzerland

Abstract not available

SP-0541 Working from home - Nay J. Heukelom 1 1 Netherlands Cancer Institute, Radiotherapy department, Amsterdam, The Netherlands

Abstract Text Working from home in radiation oncology is undesirable if it means working from home for more than one or two days a week. It has a negative effect on the quality of the work delivered by and the work pleasure of the employee, leading to a decreased quality of life for the employee. Firstly, for the majority, the quality of work diminishes when people solely work from home. There are too many distractions at home, so there is less focus; i.e. less work gets done. Moreover, the quality of work delivered is poorer because ultimately, being at home all the time is mundane. It is extremely difficult to come up with fresh ideas in a never-changing environment. Without spontaneous events or interactions, the risk of tunnel-vision is high. To do good research, or to be a good doctor, a change of scenery and perspective is necessary. Secondly, working from home generally negatively affects several components that influence job satisfaction. Examples of these are job conditions, recognition and appreciation. However, the most important factors are communication and coworkers. In short, decreased work pleasure can be largely attributed to a lack of interaction with colleagues. Most people value contact with colleagues (or patients) as one of the most important aspects of their job, and this is a lot less in the working-from-home experience. Reassuringly, recent publications show that intrinsic motivation is high among radiation oncology professionals. But it is debatable whether high intrinsic motivation can compensate all the missed moments of social interaction. The lack of true, spontaneous and above all ‘real’ contact with colleagues puts employees at risk for isolation, depression and burnout. The combination of decreased quality of work and decreased job satisfaction lead to a consequential decrease in quality of life for the employee. This is why working from home for more than two days a week should not be advocated for radiation oncologists.