Question

this brain imaging technique is a combination of the pet and mri scans? functional eeg functional cat functional pet functional mri

Explanation:

Functional PET (also called PET-MRI hybrid) integrates the metabolic activity detection of PET scans with the high-resolution anatomical imaging of MRI scans, matching the described combined technique. The other options are distinct: EEG measures brain electrical activity, CAT (CT) uses X-rays, and functional MRI only uses MRI-based functional imaging.

Answer:

Functional PET