Thanks Larry,

The links are working. I will just paste them, as the forum helper messes with the link:

1. https://dl.dropboxusercontent.com/u/5085...
2. https://dl.dropboxusercontent.com/u/5085...

You have to copy and paste in the browser.

> In that case you could just use the coordinates of the viewer.

It is not that easy... the coordenates in the SPECT Processing Tool seems not to be Talairach. It seems it gets converted into something else (figure). I am tring to find out what coordinates are these, in the viewer, however, it gets converted to MNI space coordinates (there is also another label: C_AP TC). I am trying to find info in the documentation.

> Also I am puzzled why you would want to do a group analysis of SPECT results. They vary so dramatically for different patients.

Indeed, they vary a lot and the data will probably end up being negative, as per the preliminary findings. At this point, I am really curious about previous publication of icta-interictal SPECTS. I couldn't find two papers that used the same method to acquire subtractions. This is the reason why I am still insisting in ISAS, ISAS is open source, open to audit, and has been around for years...