ESTRO 2025 - Abstract Book

S4063

RTT - Patient care, preparation, immobilisation and IGRT verification protocols

ESTRO 2025

Results:

Box plots for all patients, and an overall box plot in which all patients are aggregated, are presented in figure 1. We find that 3 patients (4, 18 and 25) were outside the (soft) 3.5mm limit for a substantial fraction of beam-on time, and would have been candidates for beam interrupts during the fraction, additional coaching and/or a switch to a free breathing technique. (Data presented is from a testing period during which data was only recorded. In our current clinical practice, action would have been taken for these patients). Stability of the camera system was found to be roughly 0.3mm (Std.Dev.) Conclusion: We have introduced a cost-effective breath hold depth camera system in our institute. The stability and speed is sufficient for monitoring and, if needed, intervention during the treatment fraction. Observations from the trial period indicate that intervention is needed for some patients.

Keywords: Breath hold, DIBH, Camera

1281

Digital Poster Assessing the difference in bowel and rectal gas following the prescription of peppermint water in prostate patients treated with 60Gy in 20 fractions Fiona Mary Milliken, Alice Corzani Radiotherapy, NHS Tayside, Dundee, United Kingdom Purpose/Objective: Gastrointestinal symptoms are the most common physical side-effects to prostate radiotherapy. These side-effects can negatively affect QoL1 and increase positional uncertainties in the PTV. Micro-enemas are widely used to resolve gas in the rectum, however, are unable to remove gas when it’s located in the bowel2. Peppermint oil is an antispasmodic medication which relaxes the muscle of the bowel wall3. It has been found to reduce nausea, vomiting, and anorexia in cancer patients undergoing chemotherapy4, but no studies assess the effect of Peppermint oil on those receiving prostate radiotherapy.