SPECT: Illuminating Brain Activity

SPECT or Single Photon Emission Computed Tomography is a process to measure blood flow in the brain providing medical professionals with an important diagnostic tool. As with most cutting-edge technology, SPECT sounds like a page ripped from a sci-fi novel. Here is how it works:

SPECT utilizes a radiopharmaceutical to create accurate images of brain function by pinpointing blood flow patterns throughout the brain. This is accomplished by injecting a minuscule amount of a radioactively tagged compound (Ceretec) that is taken up by the brain. Once in play the Ceretec emits energy for several hours. Cameras in the SPECT scanner rotate around the patients head detecting energy in the form of light. The most active brain cells emit the most energy and visa versa.


The science is impressive. However, it is important to understand that SPECT is a tool not an answer. Clinics all over the country are using SPECT studies to aid in the treatment of common psychiatric illnesses. But, it would be a mistake to believe that a SPECT study alone can confirm diagnosis. It can't.

A psychiatic/medical diagnosis regarding a specific condition is made via a combination of clinical history, a physical examination, family consultations and thorough lab work. SPECT scans can be invaluable when diagnosing certain types of dementia, head trauma and attention deficit disorder. But, it is never an end all. It is a plug-in element to help trained medical professionals make accurate decisions and appropriate treatment suggestions.

When discussing SPECT scan results with my clients I am clear in my belief that it is imperative to treat the person not the scan. Recent scientific advancements in the field are astounding. But, take away the science, take a way the theory and effective treatment is ultimately about helping patients live up to their full potential. Recognizing that potential is the stuff of humanity not the stuff of sci-fi.