fit_wcdf 0.1.4 © 2008-2010 by Turku PET Centre
Fits the WCDF and WCDF derivative sum function to the PET
time-activity curves (TACs).
Usage: fit_wcdf [Options] <TAC file> [Fit parameter file]
Options:
-CDF
WCDF function without its derivative is fitted
-fast or -safe
Speed up the fitting but increase the chance of failure, or
increase the reliability at the cost of computing time
-W1
All weights are set to 1.0; by default, sample times are used to
calculate weights unless weights are not supplied in fraction file
-k=<value>
Parameter k is constrained to given value; setting k to zero causes
the function to approach zero
-dlow=<time>
Penalize WCDF derivative higher than 1/10000 of total tissue activity
after specified time
-delay=<<value>|mean|median>
Delay time (dt) is constrained to specified value or to mean or median
of all TACs
-fit=<Filename>
Fitted TACs are written in DFT format
-svg=<Filename>
Fitted and measured TACs are plotted in specified SVG file
-h or --help
Print this message and exit
--version or --build
Print software build information and exit
--silent
Program works silently, printing only error and warning messages
--verbose
Program prints more information about what it is doing
Program writes the fit start and end times, nr of points, WSS/n,
and parameters of the fitted function to the result (fit) file,
in format:
http://www.turkupetcentre.net/analysis/doc/format_fit.html
See also:
fit2dat,
fit2res,
dftweigh,
dft2svg,
regderiv,
fit_hiad
Keywords: DFT, input, modelling, simulation
This program comes with ABSOLUTELY NO WARRANTY. This is free software, and
you are welcome to redistribute it under GNU General Public License.