Microsoft PowerPoint - Physics Bucharest

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Collapsed Cone Algorithm (approximation !)
 Applies an angular discretisation of
a parameterized kernel
 All energy inside a specified solid
angle will be transported along a
line
 Collapse cones of equal direction
into a common pipe (ie 128 in CMS)
 During each step of the transport
along a pipe, kernel energy is
picked up and attenuated and
deposited according to kernel
parameters
 Heterogeneities are accounted for
by density scaling
 Dose Calculation time ~MxN3