Out-of-field dose in stereotactic radiotherapy for paediatric patients
Lachlan Garrett, Nicholas Hardcastle, Adam Yeo, Peta Lonski, Rick Franich, Tomas Kron
PHYSICS & IMAGING IN RADIATION ONCOLOGY | ELSEVIER | Published : 2021
Background and purpose: Stereotactic radiotherapy combines image guidance and high precision delivery with small fields to deliver high doses per fraction in short treatment courses. In preparation for extension of these treatment techniques to paediatric patients we characterised and compared doses out-of-field in a paediatric anthropomorphic phantom for small flattened and flattening filter free (FFF) photon beams. Method and materials: Dose measurements were taken in several organs and structures outside the primary field in an anthropomorphic phantom of a 5 year old child (CIRS) using thermoluminescence dosimetry (LiF:Mg,Cu,P). Out-of-field doses from a medical linear accelerator were as..View full abstract
This work was supported by funding from the CASS foundation for our SABR in children program and is greatly appreciated. We thank Chris Fox and Elena Ungureanu for their help throughout this project and acknowledge the support of the Gross Foundation for the dosimetry aspects of the work.