dftweigh - tpcclib 0.6.6 © 2016 by Turku PET Centre

Add or remove the sample (time frame) weighting information to TAC file
for parameter estimations and curve fitting.
 
TACs are assumed to be corrected for decay.
The relative weights are adjusted using a scan information file (SIF),
or TACs in the file (volume weighted average of all regions or given region);
in the latter case the units in TAC file must be set correctly.
 
Usage: dftweigh [Options] tacfile [sif | tacname]
 
Options:
 -rm
     Existing weights are removed.
 -i=<Isotope code>
     Isotope, for example C-11, in case it is not found inside SIF.
     Isotope is only needed when SIF file is used.
 -L  Weights are not calculated, but existing weights are printed
     on screen. Return code is non-zero if data does not contain weights.
 -sif=<Filename>
     SIF data based on TAC file is written in given file; cannot be used
     if SIF is given as argument.
 -moderate=<value>
     Weights are moderated by adding (1/value)*max true counts to
     all counts, if (max trues)/value > (min trues). By default, value=100.
     You can set value to zero to apply full range of weights.
 -wf | -wfm
     Weights are based only on frame length or sampling interval.
     With -wfm the range of weights is reduced using option -moderate.
 -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.
 
Note that absolute weights cannot be calculated. Relative weights are
scaled so that average weight is 1.0.
 
Reference:
1. Mazoyer BM, Huesman RH, Budinger TF, Knittel BL. Dynamic PET data
   analysis. J Comput Assist Tomogr 1986; 10:645-653.
 
See also: siflist, sifcat, eframe, imgweigh, tacframe, imghead, tacunit
 
Keywords: TAC, SIF, modelling, weighting