fit_suri - tpcclib 0.8.0 © 2023 by Turku PET Centre

Non-linear fitting of the Surge function plus integral (recirculation)
to PET time-activity curves (TACs).
 
Function:
  when x<=dT, f(x) = 0 
  when x>dT,  f(x) = A*(x-dT)*exp(-B*(x-dT)) + 
                     (C*A/B^2)*(1-exp(-B*(x-dT))-B*(x-dT)*exp(-B*(x-dT)))
, where A>=0, B>=0, C>=0, and dT>=0.
 
Usage: fit_suri [Options] tacfile [parfile]
 
Options:
 -w1 | -wf
     All weights are set to 1.0 (no weighting), or weights are based on
     sampling interval. By default, weights in tacfile are used, if available.
 -lim[=<filename>]
     Specify the constraints for function parameters;
     This file with default values can be created by giving this option
     as the only command-line argument to this program.
     Without file name the default values are printed on screen.
     Setting feasible limits are highly recommended.
 -svg=<Filename>
     Fitted and measured TACs are plotted in specified SVG file.
 -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.
 
See also: fit_sinf, fit_feng, fit_ratf, fit2dat
 
Keywords: TAC, curve fitting