Dose 2016

Ray Tracing In order to determine the radiological path d radiol patient, one has to determine – voxel by voxel – the segments d 1 , d 2 , .. in each single voxel.

through the

segment d

i,j,k

voxel with index i,j,k

In a general formulation, the radiological path d radiol is:

μ 1

∑∑∑ ⋅

d

μ d

For photons:

=

radiol

kj, i,

kj, i,

i

j

k

The evaluation of this equation scales with the number of voxels = NNN ⋅ ⋅

i

k j

(for instance: 256 x 256 x 64 = 4 x10 6 iterations)

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