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