svar4tac - tpcclib 0.7.6 © 2020 by Turku PET Centre

Program for adding Gaussian noise to dynamic PET time-activity curve (TAC)
or TACs using equation
  TAC_noisy(t) = TAC(t) + (CV/100)*TAC(t)*G(0,1) ,
G(0,1) is a pseudo random number from a Gaussian distribution
with zero mean and SD of one.
 
Usage: svar4tac [Options] tacfile CV outputfile 
 
Options:
 -minsd=<Minimum SD>
     Based on CV only the samples with little or no activity would have
     very little or no noise. With this option at least the given noise
     level (SD) will be added to all samples.
 -x=<N>
     N noisy copies of each TAC are made (by default just one).
     If CV is set to zero, this option can be used to make multiple copies
     from the TACs.
 -h, --help
     Display usage information on standard output and exit.
 -v, --version
     Display version and compile information on standard output and exit.
 -d[n], --debug[=n], --verbose[=n]
     Set the level (n) of debugging messages and listings.
 -q, --quiet
     Suppress displaying normal results on standard output.
 -s, --silent
     Suppress displaying anything except errors.
 
Frame durations or weights are not used, even if available in the TAC file.
 
Example:
     svar4tac -minsd=0.2 simulated.tac 10 noisy.tac
 
See also: var4tac, fvar4tac, sim_3tcm, sim_h2o, tacadd, tacmean
 
Keywords: TAC, simulation, noise