Making presentation graphics from PET images
There are several commersial and non-commercial tools for viewing PET images, e.g. Imadeus, Vinci, Amide, and YaIT. When the image is on the screen, it can be copied from there to another program (In MS-Windows: Alt + Print Screen, and then paste) for further editing.
If two images need to be compared quantitatively, both of them must be scaled to the same color scale. Check if this is possible in your PET image viewing tool.
Although "raw" PET images contain quantitative data in units Bq/cc etc, they cannot be directly compared, because injected dose and subjects weight have almost direct influence on the radioactivity concentrations. Therefore, a parametric image, at least SUV image at it simplest, must first be calculated.
Making TIFF images without PET image viewing programs
Program ecat2tif can be used to produce rainbow or grayscale images in TIFF image format. TIFF images cannot be used in any scientific calculations, but they can be imported into almost all presentation graphics programs or directly drag-and-dropped into PowerPoint.
Use the same color scale for all images
Get the maximum value of all PET images using program
ecatmax.
For example, if all of your ECAT7 format SUV images (but no other images) are in the current
working directory, enter the following command:
ecatmax *suv.v
then look what the maximum of all images was, for example 67.32, and enter it with option
-S to the ecat2tif program every time when
you execute it to the separate SUV images, for example:
ecat2tif -rb -s=67.32 ua1234suv.v ua1234suv.tif
ecat2tif -rb -s=67.32 ua1235suv.v ua1235suv.tif
ecat2tif -rb -s=67.32 ua1236suv.v ua1236suv.tif
...