Study Guide 6 Flashcards
1
Q
What are the diagnostic tools for CNS disorders?
A
- Clinical exam
- CT
- MRI T1
- MRI T2
- Functional MRI
- PET scan
- EEG
2
Q
Why would a CT be chosen over an MRI?
A
- faster than MRI
- better for bone, chest, abdomen, spine, pelvis, tumors
- better dx of hemorrhagic vs. occlusive CVA
FAST
3
Q
CT uses:
A
Radiation
4
Q
Both types of MRIs use:
A
Magnets and radio waves
5
Q
How long do MRIs take?
A
30 mins
6
Q
What are MRIs best for visualizing?
A
- soft tissue
- tendons
- joints
- ligaments
7
Q
Types of MRI are different with this
A
Relaxation time
8
Q
MRI T1 uses (relaxation time)
A
Longitudinal relaxation time
9
Q
MRI T2 uses (relaxation time)
A
Transverse relaxation time
10
Q
Which MRI is used with gadolinium contrast?
A
MRI T1
11
Q
What does gadolinium contrast allow with an MRI T1?
A
- see vascular changes
- normal vessels
- disruption of BBB
12
Q
Transverse relaxation time (T2) is good for:
A
- brain anatomy
- CSF spaces
- most brain lesions
- early hemorrhage
13
Q
What does a functional MRI depend upon?
A
Blood oxygenation level
14
Q
What does a functional MRI look at?
A
- functional activation of brain during tasks
- can be used in research
- track changes in ability to perform motor, visual, cognitive tasks
15
Q
What does a PET scan visualize?
A
cellular activity via regional blood flow
