fit_xsur - tpcclib 0.8.0 © 2023 by Turku PET Centre
Non-linear fitting of the parameters of response function, convolved with
input TAC, to reproduce given output TAC:
output(t) = input(t) (x) h(t)
Response function is:
h(t) = a*t*exp(-b*t)*b^2
, where a is the integral of response function from zero to infinity.
Usage: fit_xsur [Options] inputfile outputfile [parfile]
Options:
-a=<value>
Constrain parameter a to specified value; fitted by default.
-amin=<value>
Minimum value for parameter a; by default 0.5.
-amax=<value>
Maximum value for parameter a; by default 1.0.
-w1
All weights are set to 1.0 (no weighting); by default, weights in
output data file are used, if available.
-wf
Weight by output TAC sampling interval.
-svg=<Filename>
Fitted and measured TACs are plotted in specified SVG file.
-i=<Interval>
Sample time interval (sec) in convolution; by default the shortest
interval in the input data; too long interval as compared to b leads
to bias.
-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.
If TAC files contain more than one TAC, only the first is used.
See also: convsurg, convexpf, sim_av, fit_suri
Keywords: TAC, curve fitting, convolution