ESTRO 2024 - Abstract Book

S3592

Physics - Dose prediction, optimisation and applications of photon and electron planning

ESTRO 2024

Conclusion:

As a conclusion, the plans that used a bolus with 0HU and -100HU give similar PTV and surface dose coverage. Although 0HU might be slightly better, up to +1% increased surface coverage when performing plan uncertainty parameters. All plans present similar doses to OARs. All in all, the use of auxiliary structures for optimisation combined with the limitation of the MU and ASC high produced robust plans for breast and axillary nodes patients.

Keywords: breast VMAT uncertainty

References:

[1] Fogliata et al Dosimetric trade-offs in breast treatment with VMAT technique Br J Radiol 90:20160701; 2017

[2] Rossi et al Optimal selection of optimization bolus thickness in planning of VMAT breast radiotherapy treatments Maija Medical Dosimetry 000 (2018) 1–8

[] Binny et al. Investigating the use of aperture shape controller in VMAT treatment deliveries Medical Dosimetry 45 (2020) 284–292