How is a brain SPECT scan different than a CT or MRI scan?
CT (Computed Tomography) and MRI (Magnetic Resonance Imaging) look at the brain’s structure (anatomy). SPECT imaging assesses the brain’s blood flow (functioning). In many cases the brain’s structure may be normal, while the functioning is abnormal. In psychiatry the majority of CT’s and MRI’s ordered on our patients are found to be normal, yet their symptoms persist. Psychological problems often reveal abnormalities with the brain’s functioning as opposed to its anatomy. Consider this analogy—if you were flying in an airplane today you would want to know that the engine was working right. Taking a picture of the engine (CT/MRI) shows you all of the parts, but does not give you any information about how well the engine is running (functioning). A brain SPECT image identifies important information about your brain’s functioning. Identifying an areas of abnormal functioning can be vitally important in helping you doctor make the best diagnosis and treatment plan for you. What’s the reaso
