RT Journal Article T1 Performance of a virtual source model for stereotactic radiosurgery with a dynamic micro-multileaf collimator. A1 González-Infantes, Wilfredo A1 Anguiano, Marta A1 Lallena, Antonio K1 Óptica K1 Estereoencefalotomía AB A virtual source model recently developed for external radiotherapy,which includes two photon sources and two electron sources, is tested for stereotacticradiosurgery with a dynamic micro-multileaf collimator. A 6 MV Elekta Preciselinac that incorporates a 3Dline L’Arancio dynamic micro-multileaf collimator wasconsidered. The capabilities of the virtual source model have been tested againstfull simulations performed with the Monte Carlo simulation code PENELOPE usingboth PENELOPE itself and the rapid Monte Carlo code DPM. The reference10 cm × 10 cm radiation field as well as small fields of 1.2 cm × 1.2 cm, 2.9 cm × 2.9 cmand 5.8 cm×5.8 cm were considered. The dynamic micro-multileaf collimator effect canbe included in the virtual source model by reducing the width of the photon primarysource by a factor 3. In all cases the virtual source model simulations were in verygood agreement with the complete ones including the linac and collimator geometries. PB IOP YR 2017 FD 2017-11-17 LK https://hdl.handle.net/10630/37133 UL https://hdl.handle.net/10630/37133 LA eng NO W González et al 2017 Biomed. Phys. Eng. Express 3 065008 NO https://publishingsupport.iopscience.iop.org/questions/what-is-iop-publishings-green-open-access-policy/ DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 20 ene 2026