Monte Carlo modeling of the Siemens Optifocus multileaf collimator

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Monte Carlo modeling of the Siemens Optifocus multileaf collimator Victor Laliena, Alejandro García-Romero Physica Medica: European Journal of Medical Physics Volume 31, Issue 3, Pages 301-306 (May 2015) DOI: 10.1016/j.ejmp.2015.01.016 Copyright © 2015 Associazione Italiana di Fisica Medica Terms and Conditions

Figure 1 The tongue-and-groove designs modeled by SMLC (left) and by VARMLC (right). Physica Medica: European Journal of Medical Physics 2015 31, 301-306DOI: (10.1016/j.ejmp.2015.01.016) Copyright © 2015 Associazione Italiana di Fisica Medica Terms and Conditions

Figure 2 MLC configuration for the TGF. Physica Medica: European Journal of Medical Physics 2015 31, 301-306DOI: (10.1016/j.ejmp.2015.01.016) Copyright © 2015 Associazione Italiana di Fisica Medica Terms and Conditions

Figure 3 A vertical cross section (YZ plane) of SMLC obtained by ray tracing (Experimental measurements ). Physica Medica: European Journal of Medical Physics 2015 31, 301-306DOI: (10.1016/j.ejmp.2015.01.016) Copyright © 2015 Associazione Italiana di Fisica Medica Terms and Conditions

Figure 4 Absorbed dose profiles obtained from Monte Carlo simulations of the TGF with SMLC and with VARMLC. Physica Medica: European Journal of Medical Physics 2015 31, 301-306DOI: (10.1016/j.ejmp.2015.01.016) Copyright © 2015 Associazione Italiana di Fisica Medica Terms and Conditions

Figure 5 Cumulative distribution functions of the random variables r(y) (crossed circles) and q(y) (diamonds). For comparison, the standard normal distribution is also plotted. In the legend, diffs. stands for differences. Physica Medica: European Journal of Medical Physics 2015 31, 301-306DOI: (10.1016/j.ejmp.2015.01.016) Copyright © 2015 Associazione Italiana di Fisica Medica Terms and Conditions

Figure 6 Measured off-axis dose profiles for the TGF (points) and simulations with SMLC and different values of the air gap width (solid lines). The horizontal line is 100-AMDD from the EPID measurement. Physica Medica: European Journal of Medical Physics 2015 31, 301-306DOI: (10.1016/j.ejmp.2015.01.016) Copyright © 2015 Associazione Italiana di Fisica Medica Terms and Conditions

Figure 7 Average maximum dose deficit vs. air gap width. The linear fit to the simulation results intercepts the experimental result (horizontal line) at an air gap width of 0.102(1) mm. Only three points are included in the fit. Physica Medica: European Journal of Medical Physics 2015 31, 301-306DOI: (10.1016/j.ejmp.2015.01.016) Copyright © 2015 Associazione Italiana di Fisica Medica Terms and Conditions

Figure 8 Gamma analysis of an IMRT head-and-neck field simulations vs. EPID measurement. In the gamma planes, red means gamma >1. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.) Physica Medica: European Journal of Medical Physics 2015 31, 301-306DOI: (10.1016/j.ejmp.2015.01.016) Copyright © 2015 Associazione Italiana di Fisica Medica Terms and Conditions