Dosimetric analysis of beam-matching procedure of two similar linear accelerators.

Linear accelerators from the same vendor in a radiation therapy center are usually beam-matched following Vendor's acceptance criteria. This protocol is limited to check the difference at particular points on the ionization curve for depth dose or beam profiles. This article describes different tests done after commissioning to evaluate the level of agreement between matched beams of two ONCOR Impression plus linear accelerators from Siemens.

An algorithm for fast beam angle selection in intensity modulated radiotherapy.

Purpose: This article aims to introduce a novel algorithm for fast beam angle selection in intensity modulated radiotherapy (IMRT).

Methods: The algorithm models the optimization problem as a beam angle ranking problem and chooses suitable beam angles according to their rank. A new parameter called "beam intensity profile perturbation score (BIPPS)" is used for ranking the beam angles.