نتایج جستجو برای: flattening filter free beams

تعداد نتایج: 665364  

2016
Daniel L. Saenz Ganesh Narayanasamy Wilbert Cruz Nikos Papanikolaou Sotirios Stathakis

The Elekta Versa HD incorporates a variety of upgrades to the line of Elekta linear accelerators, primarily including the Agility head and flattening filter-free (FFF) photon beam delivery. The completely distinct dosimetric output of the head from its predecessors, combined with the FFF beams, requires a new investigation of modeling in treatment planning systems. A model was created in Pinnac...

Journal: :International Journal of Radiation Oncology*Biology*Physics 2017

Journal: :Medical physics 2005
Michael K Fix Paul J Keall Jeffrey V Siebers

One limitation to the widespread implementation of Monte Carlo (MC) patient dose-calculation algorithms for radiotherapy is the lack of a general and accurate source model of the accelerator radiation source. Our aim in this work is to investigate the sensitivity of the photon-beam subsource distributions in a MC source model (with target, primary collimator, and flattening filter photon subsou...

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