| Positron
Emission Tomography |
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| Radionuclides
that emit positrons |
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| such as 15O
and 18F are |
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| introduced
into the brain. |
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| H215O
behaves like H216O and |
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| indicates
blood flow (rCBF) (half |
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| life = 123
seconds) integration |
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| time ≈
60 seconds. |
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| 18F
– deoxyglucose behaves like |
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| deoxyglucose
and indicates |
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| metabolic
activity (half-life = 110 |
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| minutes)
integration time ≈ 20 |
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| minutes |
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| PET SCANNER |
| From:
www.epub.org.br/cm/n011pet/pet.htm |
| Columbia fMRI |