Optimized radiotherapy using all available photon energies
Precision radiotherapy treatment plans such as intensity modulated radiotherapy (IMRT) and volumetric modulated arc therapy (VMAT) attempt to provide the prescribed radiation dose to the target volume while minimizing the dosage received by the surrounding healthy tissue. While many of the parameters of the treatment plan have been moved into an optimization framework, a critical parameter, the photon beam energy, remains a hand-selected parameter subject to the practitioners discretion and operational capabilities of the linear accelerator (linac). Allowing treatment planning system optimization routines to leverage all available and potentially arbitrary photon energies would dramatically improve treatment plans and patient outcomes.
This technology is capable of synthetically producing a photon beam of arbitrary “effective energy” using only the nominal photon energies available with a given linac.
This technology has the primary advantage of being realized entirely in software and can therefore work with existing linacs. While other energy modulation schemes exist for providing the same flexibility, these required additional physical devices.