Dear Audrey: I would appreciate more information, references and citations of this technique. I only know of PET (Positron Emission Tomography) that can actually scan the brain. Michel Audrey Cashwell wrote: > This is nothing like an MRI. AB-CIT-SPECT SCAN -is a radioactively drug > injected into your vein and binds to the dopamine neurons in your brain ,and > this happens for about 2 days till they do the scan.