dftweigh 2.3.1 © 2000-2013 by Turku PET Centre
Adds or removes the frame weighting information to DFT file for parameter
estimations. TACs in DFT file are assumed to be corrected for decay.
The relative weights are adjusted using a scan information file (SIF),
or TACs in DFT file (volume weighted average of all regions or given region);
in the latter case the units in DFT file must be set correctly.
Usage: dftweigh [Options] <DFT file> [SIF file | Region name]
Options:
-rm
Existing weights are removed
-i=<Br-76|Cu-62|C-11|Ga-68|Ge-68|F-18|N-13|O-15|Rb-82>
Isotope, in case it is not found inside SIF file.
Isotope is only needed when SIF file is used.
-L Weights are not calculated, but existing weights are printed
on screen.
-sif=<Filename>
SIF data based on DFT file is written in given file.
-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 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.
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,
cti2sif,
dftframe,
sif2ecat,
dftunit
Keywords: DFT, SIF, modelling, weighting
This program comes with ABSOLUTELY NO WARRANTY. This is free software, and
you are welcome to redistribute it under GNU General Public License.