784 / 1245
Oncentra/Monaco
1
– (Pencil beam) and
Collapsed Cone Convolution
Patient tissue distribution is represented by a 3D density matrix where the
properties in each voxel are either derived from pixel values in a CT image
or from user specified values of mass or electron density.
It is assumed that the specified density values correspond to tissue material
of “standard” compositions (see ICRP 23 and ICRU 44).
The Hounsfield number assigned to each standard tissue is mapped from
the calculated electron density using relations given by Knöös et al [38].
…for charged particle equilibrium conditions CC calculates dose to medium
while PK calculates dose to a large water cavity in medium. Both algorithms
consider attenuation of the beam as per medium
thus;
Pencil kernel and for point kernel
April 2017
28
,
,
1)
Monaco do not supply a PB model initially