imglk3 0.1.0 © 2006 by Turku PET Centre
Estimation of lambda*k3 (lambda=K1/k2) from dynamic PET images in ECAT 6.3
or 7.x format applying the irreversibe two-tissue compartment model [1, 2]:
1) Ki is calculated using the average of graphical analysis (Gjedde-Patlak)
slopes between time range tGA1-tGA2 (see below).
2) K1 is estimated with bilinear regression between time ranges 0-tBR1
and 0-tBR2 [2].
3) Lambda*k3 is calculated as lambda*k3=K1*Ki/(K1-Ki).
Parameters:
1) Input file (Arterial plasma corrected for metabolites and delay time;
times in minutes)
2) Dynamic PET image file
3) tGA1 (Gjedde-Patlak linear fit start time; min)
4) Lambda*k3 image file
Options:
-Thr=<threshold%>
Pixels with AUC less than (threshold/100 x max AUC) are set to zero.
Default is 10 %
-K1=<filename>
K1 image is saved.
-Ki=<filename>
Ki image is saved.
-F Remove parametric pixel values that are over 4x higher than
their closest neighbours.
-tGA2=<time>
Gjedde-Patlak linear fit end time (min).
By default, all PET data is used.
-tBR1=<time (min)>
K1 results are calculated starting from range 0-tBR1; by default, 5 min.
-tBR2=<time (min)>
K1 results are calculated until range 0-tBR2; by default, 18 min.
-h or --help
Print this message and exit
-v, --build or --version
Print software build information and exit
--silent
Program works silently, printing only warnings and error messages.
e.g.: imglk3 ua2918ap.parent.kbq ua2918dy1.v 6 ua2918lk3.v
References:
1. Fowler JS, Volkow ND, Wang GJ, Logan J, Pappas N, Shea C, MacGregor R.
Age-related increases in brain monoamine oxidase B in living healthy
human subjects. Neurobiol Aging 1997; 18: 431-435.
2. Logan J, Fowler JS, Volkow ND, Wang G-J, MacGregor RR, Shea C.
Reproducibility of repeated measures of deuterium substituted
[11C]L-deprenyl ([11C]L-deprenyl-D2) binding in the human brain.
Nucl Med Biol 2000; 27:43-49.
See also:
imgcbv,
imglhlk3,
imglhk3,
ecat2tif
Keywords: image, modelling, irreversible uptake
This program comes with ABSOLUTELY NO WARRANTY. This is free software, and
you are welcome to redistribute it under GNU General Public License.