dftratio - tpcclib 0.8.0 © 2023 by Turku PET Centre
Calculate 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
Ratio = ---------------------
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 ratio, SUR).
Usage: dftratio [options] ttacfile reference t1 t2 resultfile
Reference can be given either as the name or number of the reference TAC
inside the TTAC file or the name of file containing the reference TAC.
Start and end times (t1 and t2) must be given in minutes, if TAC file(s)
do not contain time units. To use the whole time range of ttacfile, enter
zeroes as t1 and t2.
Bound/free-ratio is calculated instead of Total/free;
reference region TAC is first subtracted from other regional TACs.
Bound TAC maximum value is searched between start and end times,
and Bound/free ratio is calculated at this time point; this should
not be used with noisy data.
Ratio curve is saved for plotting.
Display usage information on standard output and exit.
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.
Suppress displaying normal results on standard output.
Suppress displaying anything except errors.
dftratio ut1234.tac occip 40 60 ut1234ratio.res
See also: imgratio, taccalc, dftinteg, interpol, tacunit, dftsuv
Keywords: TAC, modelling, AUC, ratio