"Technical note: Cryostat transmission characterization for MR linac – " by Urszula Jelen, Claire Pagulayan et al.
Background: In the Unity MR linac (Elekta AB, Stockholm, Sweden), the radiation beam traverses the cryostat and the coil support structure. The resulting beam attenuation must be considered for output calibration and its variation with gantry angle must be characterized in the treatment planning system (TPS). Purpose: The aim of this work was to investigate the impact of a change of the cryostat transmission characterization (CTC) curve, due to the helium level modification, on clinical treatment plan dosimetry and to report on the experience with the CTC curve update. Methods: Twenty stereota...
Source: uow.edu.au