SPECT vs fMRI: The Best Brain Scanning Tool? | Cognitive FX

SPECT vs. fMRI (functional MRI), which is the better brain scan for diagnosing traumatic brain injury? What is SPECT? and what is fMRI?
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What is a SPECT Scan?
SPECT stands for “single-photon emission computed tomography.” That’s a mouthful, so here’s what it translates to:

Patients are injected with a radioactive isotope that emits gamma rays (electromagnetic radiation emitted by a decaying atom). As the isotope (also known as a radioactive tracer) travels through the patient’s bloodstream, it continues to emit radiation. (We know how that sounds, but it really is a safe level of radiation).
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