%0 Journal Article
%T Comparison of Absorbed Dose to Medium and Absorbed Dose to Water for Spine IMRT Plans Using a Commercial Monte Carlo Treatment Planning System
%A Muhammad Nauman Usmani
%A Norihisa Masai
%A Ryoong-Jin Oh
%A Hiroya Shiomi
%A Daisaku Tatsumi
%A Hideharu Miura
%A Toshihiko Inoue
%A Masahiko Koizumi
%J International Journal of Medical Physics,Clinical Engineering and Radiation Oncology
%P 60-66
%@ 2168-5444
%D 2014
%I Scientific Research Publishing
%R 10.4236/ijmpcero.2014.31010
%X <p class=\"MsoNormal\">
	<span lang=\"EN-CA\" style=\"font-family:Verdana;\">Dose in radiation therapy has been reported as the water-equivalent dose
using conventional dose calculation algorithms. The Monte Carlo (MC) algorithm </span><span lang=\"EN-US\" style=\"font-family:Verdana;\">employs characterization of human tissues by elemental composition
and mass density. It enables more</span><span lang=\"EN-CA\" style=\"font-family:Verdana;\"> accurate dose
calculation for radiation therapy treatment planning and typically reports
absorbed dose to medium.</span><span lang=\"EN-CA\"> </span><span lang=\"EN-CA\"><span style=\"font-family:Verdana;\">Whether one should use dose to medium or tissue (D</span><sub><span style=\"font-family:Verdana;\">m</span></sub><span style=\"font-family:Verdana;\">) in place
of dose to water (D</span><sub><span style=\"font-family:Verdana;\">w</span></sub><span style=\"font-family:Verdana;\">) for MC treatment planning remains the subject
of debate. The aim of the current study is to evaluate the differences between
dose</span></span><span lang=\"EN-CA\" style=\"font-family:Verdana;\">-</span><span lang=\"EN-CA\"><span style=\"font-family:Verdana;\">volume indices for D</span><sub><span style=\"font-family:Verdana;\">m</span></sub><span style=\"font-family:Verdana;\"> and D</span><sub><span style=\"font-family:Verdana;\">w</span></sub><span style=\"font-family:Verdana;\"> MC-calculated
IMRT plans. Thirty</span></span><span lang=\"EN-CA\" style=\"font-family:Verdana;\">-</span><span lang=\"EN-CA\" style=\"font-family:Verdana;\">seven spine patients were selected for this study. </span><span lang=\"EN-US\"><span style=\"font-family:Verdana;\">The IMRT optimization and MC calculations were performed using the
iPlan RT Dose</span><sup><span style=\"font-family:Verdana;\">TM </span></sup><span style=\"font-family:Verdana;\">ver 4.1.2 (Brainlab, Munich, Germany) treatment
planning system (TPS) with an X-ray Voxel Monte Carlo (XVMC) dose calculation
engine.</span></span><span lang=\"EN-US\"> </span><span lang=\"EN-CA\" style=\"font-family:Verdana;\">D</span><sub><span lang=\"EN-CA\" style=\"font-family:Verdana;\">w</span></sub><span lang=\"EN-CA\"><span style=\"font-family:Verdana;\"> and D</span><sub><span style=\"font-family:Verdana;\">m</span></sub><span style=\"font-family:Verdana;\"> results for target and critical structures were evaluated using the dose</span></span><span lang=\"EN-CA\" style=\"font-family:Verdana;\">-</span><span lang=\"EN-CA\" style=\"font-family:Verdana;\">volume-based indices. Systematic
differences
%K Dose to Medium
%K Dose to Water
%K Monte Carlo
%K IMRT
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=43057