ESTRO 2023 - Abstract Book

S2034

Digital Posters

ESTRO 2023

Conclusion The TGRT is a technically feasible technique in all radiotherapy facilities after minimally adapting the institutional clinical workflow. Treatment time and patient safety are not impaired. At this stage, the TGRT technique quantifies position errors and adds patient monitoring capabilities that can lead to treatment adaption.

PO-2262 GI factors, prevalence of and potential to affect motion during radiotherapy. A scoping review

S. Alexander 1 , H. McNair 1 , U. Oelfke 2 , A. Tree 3

1 The Royal Marsden NHS Foundation Trust/ The Institute of Cancer Research, Radiotherapy, Sutton, United Kingdom; 2 The Royal Marsden NHS Foundation Trust/ The Institute of Cancer Research, The Joint Department of Physics, Sutton, United Kingdom; 3 The Royal Marsden NHS Foundation Trust/ The Institute of Cancer Research, Uro-oncology, Sutton, United Kingdom Purpose or Objective The probability and magnitude of prostate motion during radiotherapy is associated and increases with rectal distension[1- 6]. Rectal filling is the product of digestive events occurring throughout the GI tract and is influenced by intrinsic patient and environmental factors[7]. We hypothesise that these factors, which affect bowel function and rectal filling, consequently impact prostate motion. If true, patient specific measurement of these GI-factors could predict motion uncertainty during radiotherapy, facilitating personalised care by optimising treatment technique e.g., daily adaption or via bespoke patient pre-habilitation and preparation. A scoping literature review was completed to identify GI-factors most likely to influence prostate motion during radiotherapy and establish reliable, quick methods of quantifying these in a busy clinic.

Materials and Methods