ESTRO 2024 - Abstract Book

S5527

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

ESTRO 2024

in session one at the 25 and 35 minutes timepoint. A reduction in median bladder fill rate to 1.60 cm 3 and 1.36 cm 3 was noted in session two and session three respectively, at the 25-minute timepoint. There was a rise in the median bladder fill rate 3.11 cm 3 , 3.16 cm 3 in session 2 and session 3 respectively, at the 35-minute timepoint. A reduced bladder filling rate was determined when compared to the standard bladder preparation data previously reported (Table 1). Intrafraction prostate motion in the anterior-posterior direction was smaller than for patients treated with standard bladder preparation (Table 1). Patients tolerated the novel bladder preparation well with no reported discomfort and found it easy to follow.

Conclusion:

This study showed that if patients were well hydrated, the desired bladder volume of approximately 200 cm 3 was achieved and mitigated the need for a rigid bladder preparation protocol. The novel approach achieved a reduction in bladder filling rate resulting in less intra-fraction motion of the prostate. Additionally, it would reduce patient stress and anxiety, thereby creating a more positive impact on their experience.

Keywords: Bladder preparation, Radiotherapy, Prostate cancer

References:

1) Pang, E.P.P., Knight, K., Hussain, A., Fan, Q., Baird, M., Tan, S.X.F., Mui, W.H., Leung, R.W.K., Seah, I.K.L., Master, Z. and Tuan, J.K.L., 2018. Reduction of intra-fraction prostate motion–determining optimal bladder volume and filling for prostate radiotherapy using daily 4D TPUS and CBCT. Technical innovations & patient support in radiation oncology, 5, pp.9-15.