AT.run.CPPSC.method: AT.run.CPPSC.method

In libamtrack: Computational Routines for Proton and Ion Radiotherapy

Description

Computes HCP response and relative efficiency/RBE using compound Poison processes and successive convolutions (CPP_SC, the SPIFF algorithm)

Usage

AT.run.CPPSC.method(E.MeV.u, particle.no, fluence.cm2.or.dose.Gy,
 material.no, stopping.power.source.no, 
	rdd.model, rdd.parameters, er.model, gamma.model, gamma.parameters, 
	N2, fluence.factor, write.output, shrink.tails, shrink.tails.under, 
	adjust.N2, lethal.events.mode)

Arguments

E.MeV.u	particle energy for each component in the mixed particle field [MeV/u] (array of size number.of.field.components) (see also E.MeV.u).
particle.no	particle type for each component in the mixed particle field (array of size number.of.field.components) (see also particle.no).
fluence.cm2.or.dose.Gy	if positive, particle fluence for each component in the mixed particle field [1/cm2]; if negative, particle dose for each component in the mixed particle field [Gy] (array of size number.of.field.components) (see also fluence.cm2.or.dose.Gy).
material.no	index number for detector material (see also material.no).
stopping.power.source.no	TODO (see also stopping.power.source.no).
rdd.model	index number for chosen radial dose distribution (see also rdd.model).
rdd.parameters	parameters for chosen radial dose distribution (array of size 4).
er.model	index number for chosen electron-range model (see also er.model).
gamma.model	index number for chosen gamma response.
gamma.parameters	parameters for chosen gamma response (array of size 9).
N2	number of bins per factor of two for the dose scale of local dose histogram.
fluence.factor	factor to scale the fluences / doses given in fluence.cm2.or.dose.Gy with.
write.output	if true, a log-file is written to SuccessiveConvolutions.txt in the working directory.
shrink.tails	if true, tails of the local dose distribution, contributing less than shrink.tails.under are cut.
shrink.tails.under	limit for tail cutting in local dose distribution.
adjust.N2	if true, N2 will be increase if necessary at high fluence to ensure sufficient local dose histogram resolution.
lethal.events.mode	if true, computations are done for dependent subtargets.

Value

N2	number of bins per factor of two for the dose scale of local dose histogram
relative.efficiency	particle response at dose D / gamma response at dose D
d.check	sanity check: total dose (in Gy) as returned by the algorithm
S.HCP	absolute particle response
S.gamma	absolute gamma response
mean.number.of.tracks.contrib	mean number of tracks contributing to representative point
start.number.of.tracks.contrib	low fluence approximation for mean number of tracks contributing to representative point (start value for successive convolutions)
n.convolutions	number of convolutions performed to reach requested dose/fluence
lower.Jensen.bound	lower bound for Jensen's inequity
upper.Jensen.bound	upper bound for Jensen's inequity

See Also

View the C source code here: http://sourceforge.net/apps/trac/libamtrack/browser/tags/0.6.3/src/AT_Algorithms_CPP.c#L34

Examples

# Compute the relative efficiency of an Alanine detector in a mixed
# carbon / proton field
AT.run.CPPSC.method( particle.no                          = c(6012, 1001,
 1001),         # namely carbon, protons, and protons with
                     E.MeV.u                              = c(270, 270, 5),   
           
# 270 MeV/u (primary Carbon, 270 MeV/u and 5 MeV/u (fast and slow proton
# component) 
                     fluence.cm2.or.dose.Gy               = c(1e8, 1e9, 1e7), 
           # and their corresponding fluences
                     material.no                          = 5,                
           # i.e. Alanine
                     rdd.model                            = 3,                
           # simple 'Geiss' parametrization of radial dose distribution
                     rdd.parameter                        = 50e-9,            
           # with 50 nm core radius
                     er.model                             = 4,                
           # M. Scholz' parametrization of track radius
                     gamma.model                          = 2,                
           # General hit/target X ray response, but
                     gamma.parameters                     = c(1,500,1,1,0),   
           
# as simple single exponential saturation (one hit, one target), saturation
# dose 500 Gy
                     N2                                   = 10,               
           # ten bins per factor 2 for internal local dose histogramming
                     fluence.factor                       = 1.0,              
           # can be used to easily scale total fluence (historical)
                     write.output                         = TRUE,             
           # write a log file
                     shrink.tails                         = TRUE,             
           # cut tails of local dose distribution, if...
                     shrink.tails.under                   = 1e-30,            
           # ... they contribute less then 1e-30 to first moment of histogram
                     adjust.N2                            = TRUE,             
           # perform rebinning if local dose distribution becomes too narrow
                     lethal.events.mode                   = FALSE,            
           # use independent subtargets
                     stopping.power.source.no             = 2)                
      

libamtrack documentation built on May 1, 2019, 6:47 p.m.