Neuroimaging Essentials Flashcards Preview

โ–บ Med - Pathology > Neuroimaging Essentials > Flashcards

Flashcards in Neuroimaging Essentials Deck (13):
1

What are the advantages of MRI?

โ€“ Best imaging of brain and spinal cord
โ€“ Multiple views (axial, sagittal, coronal) available
โ€“ No radiation exposure

2

What are the disadvantages of MRI?

โ€“ Longer scanning time, images degraded by patient movement
โ€“ Prohibited in presence of pacemakers or certain implanted metal
โ€“ Tight, enclosed scanner is difficult for claustrophobic patients

3

What are the advantages of CT?

โ€“ Shorter scanning time (advantages for unstable or agitated
patients)

4

What are the disadvantages of CT?

โ€“ Radiation exposure
โ€“ Axial views, needs image reformatting to obtain other views

5

What is the contrast agent in MRI?

Gadolinium

6

What is the contrast agent in CT?

Iodine

7

T1W MRI

Highlights anatomy with CSF being dark

8

T2W MRI

Highlights pathology with CSF being bright

9

FLAIR MRI

Fluid Attenuation Recovery - similar to T2W but high signal bright CSF is removed

10

What type of MRI will lesions be bright on?

- T2W
- FLAIR

11

How does acute hemorrhage change on a CT scan over time?

Starts hyper dense and eventually becomes isodense and then hypodense (black)

12

What is the best imaging for acute infarction?

Diffusion Weighted MRI

(DWI)

13

What will be enlarged in cerebral aqueduct stenosis?

- 3rd Ventricle
- Lateral Ventricles

NOT the 4th ventricle

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