Emission Computed Tomography (ECT)
Emission Computed Tomography is the most invasive method for brain imaging. Its name comes from the emission of radioactive energy by tracers injected into the blood - which is a signature aspect of this approach to understanding the brain.
The two major types of ECT are:
- Positron Emission Tomography (PET); and
- Single-Photon Emission Computed Tomography (SPECT)
Each of these uses different types of radioactive isotopes and they are monitored in the brain using different tools.
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Using Emission Computed Tomography
To use the ECT method is to inject radioactive atoms into the person's bloodstream and have them circulated into the brain. The energy emitted is monitored by external devices that provide information about their concentration in the brain. Lastly, a mathematical model allows the data on radiatio...
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