230-231 / 1359
Each voxel assumed to have single
atomic composition and density
Now: Patient represented by large number
of voxels each with a Hounsfield number
However CT is at kV energies
Radiological properties
relevant to MV are not directly
available
M. Schwarz
Assigned by a calibration curve
For non-water and direct simulation of
radiation transport need:
•Electron Density
•Mass Density
•Chemical composition