gMocren: High-quality volume visualization tool for Geant4 simulation

The Geant4 toolkit contains polygon-based visualization drivers that render simulated geometric definitions of matter and particle trajectories. However, since this toolkit does not have a function of volume rendering, it cannot be used to display patient data. Furthermore, this toolkit does not display the simulated dose distribution. In order to resolve these problems, a novel visualization tool, called "gMocren" is developed. gMocren can simultaneously display both the volume data for a patient and the simulated dose distribution. As well, gMocren helps the user intuitively and easily confirm the simulation results.