thanks for your help. I tried both, extracting the data with the code
provided by Will (V=spm_vol('dir\con_image.img'); define XYZs;
beta=spm_get_data(V,XYZ);) and the Volumes toolbox from CheckReg menue.
While the data returned by the code and the value in ext.raw are the same,
INTENSITY-values (Y) are different. What's the difference between these
two values and which one is the beta I should use?
By the way, how do I convert voxel-coordinates to MNI space?