Lecture 4 - Neuroimaging II Flashcards
1
Q
What does PET stand for?
A
positron emission tomography
2
Q
Describe PET scanning.
A
Radio active tracer injected into patient.
Material distributed throughout tissue and then image where the radioactive material is found.
3
Q
How does PET work?
A
As the radioactive substance decays, positrons are emitted.
Positron moves through the tissue until it meets an electron and are drawn together and undergo annihilation reaction to give out energy.
2 gamma photons exit from the human body where detectors detect their presence.
4
Q
What does a hot colour represent in a PET?
A
Grey matter (high glucose metabolic rate)
5
Q
What does a cool colour represent in a PET?
A
White matter (low glucose metabolic rate)
6
Q
A
