ESTRO 2024 - Abstract Book

S397

Brachytherapy - Urology

ESTRO 2024

Figure 2 – Axial TRUS planning images of prostate with needles inserted for four example cases. Visible are the reconstructed (magenta dots) as well as EMT measured dwell positions (green dots). Yellow arrows point to identified reconstruction errors detected with EMT.

Conclusion:

This study affirmed the stability of EMT measurements in intraoperative prostate TRUS-based HDR-BT, as indicated by minimal relative displacements during the procedure. The introduction of EMT measurements in this setting revealed minor to severe needle reconstruction errors that remained undetected in clinical practice, with a notable 9% of the total number of needles exhibiting major to severe errors. Although further dosimetric analysis of the impact of these errors is necessary it became clear that clinical introduction of EMT has the potential to render less error-prone intraoperative TRUS-based prostate HDR-BT.

Keywords: Electromagnetic Tracking, Implant reconstruction

References:

[1] Siebert, Frank-André, et al. "GEC-ESTRO/ACROP recommendations for quality assurance of ultrasound imaging in brachytherapy." Radiotherapy and oncology 148 (2020): 51-56.

[2] Bharat, Shyam, et al. "Electromagnetic tracking for catheter reconstruction in ultrasound-guided high-dose-rate brachytherapy of the prostate." Brachytherapy 13.6 (2014): 640-650.