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
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.
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.
Display usage information on standard output and exit.
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.
Suppress displaying normal results on standard output.
Suppress displaying anything except errors.
Frame durations or weights are not used, even if available in the TAC file.
svar4tac -minsd=0.2 simulated.tac 10 noisy.tac
See also: var4tac, fvar4tac, sim_3tcm, sim_h2o, tacadd, tacmean
Keywords: TAC, simulation, noise