Neuroimaging (M1) Flashcards
1
Q
What image does a CT scan show?
A
2D image
2
Q
What is used in a CT scan?
A
Iodine - contrasting agent
3
Q
What are the advantages/disadvantages of a CT scan?
A
Advantages: cheaper, quick
Disadvantages: ionizing radiation
4
Q
What are positrons
A
Positively-charged electrons that are released from glucose when radioactive isotopes decay
5
Q
Which is lighter in a MRI: gray or white matter?
A
White matter is lighter than gray matter in T1-weighted scans, but not in T2-weighted scans
6
Q
How does a fMRI work?
A
Takes advantage of the higher magnetism of deoxyhemoglobin vs. oxyhemoglobin
7
Q
A
