Methods and apparatus for hardware based radiation dose calculation

Disclosed is an example method to calculate radiation dose. The method includes receiving a tissue matrix in which the tissue matrix includes a plurality of voxels. The example method also includes producing a first plurality of transport lines with a direction controller in which each transport line is indicative of a cone of irradiated energy, and calculating at least one radiation dose with at least one deposit engine substantially in parallel with producing a second plurality of transport lines with the direction controller.