2005-08-02 Vesa Oikonen, Kaisa Sederholm - Turku PET Centre

Adding weight factors to regional PET TAC data

Weights can be added to tissue data file using program dftweigh. Weights can be extracted either from a SIF file (*dy1.img.sif), or if it does not exist, based on the average tissue curves. The weights are not absolute, but only relational to each time frame in the TAC.

If weights are extracted from the SIF file, the command could be e.g.:

dftweigh ua0268.dft ua0268dy1.img.sif C-11

If SIF file is not used, the command would be:

dftweigh ua0268.dft

Note that weights need to be added to the DFT datafile only once, and they may affect the results of other calculation programs. The weights can be removed using the same program, dftweigh, with option -rm.

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