dftratio 1.5.0 © 2003-2012 by Turku PET Centre
Calculates the regional tissue to reference tissue ratio, which is often
used as a robust and model independent index of receptor availability.
By default, ratio of AUCs is calculated as
Regional AUC(t1..t2)
Ratio = ---------------------
Reference AUC(t1..t2)
Data concentration units are cancelled out from the ratio. Therefore
the result is the same if it is calculated from original radioactivity
concentrations or SUV TACs (SUV ratios).
Parameters:
1) Tissue TAC file
2) Name of reference region in tissue file, or name of datafile
containing the reference tissue TAC
3-4) Start and end times for AUC calculation (t1 and t2) in minutes
5) Result file (existing file is overwritten)
[6) Ratio curve file (optional); only for plotting ]
Options:
-B Bound/free-ratio is calculated instead of Total/free;
reference region TAC is first subtracted from other regional TACs.
-M Bound TAC maximum value is searched between start and end times,
and Bound/free ratio is calculated at this time point.
-h or --help
Print this message and exit.
--version or --build
Print software build information and exit
--silent
Program works silently, printing only warnings and error messages
--verbose
Program prints more information about what it is doing.
The weights are not used in the calculations.
Example:
dftratio ut1234.dft cer 40 60 ut1234ratio.res
See also:
imgratio,
dftcalc,
dftdv,
interpol,
dftunit,
dftsuv,
rescoll
Keywords: TAC, DFT, modelling, AUC, ratio
This program comes with ABSOLUTELY NO WARRANTY. This is free software, and
you are welcome to redistribute it under GNU General Public License.
