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Flashcards in Neuroradiology Deck (21):
1

What are the indications for brain imaging?

Headache/ raised ICP
Seizures
Weakness/stroke
Trauma
Loss of consciousness/ neurological deficit
Post-op
Congenital
Inflammatory
Vascular
Degenerative
Neoplastic

2

What are common causes of headache/ raised ICP?

Mass
Bleed
Hydrocephalus
Venous thrombosis
Infection

3

What are common causes for seizures?

Developmental
Tumour

4

What are common causes for weakness/ stroke?

Infarct
Bleed

5

What are common trauma issues that require brain imaging?

Bleed
Mass effect
Fracture

6

What are common causes for loss of consciousness/ neurological deficit?

Infarct
Bleed
Tumour

7

What are common post-op complications requiring brain imaging?

Collection
Bleed
Baseline

8

What are the positives of CT?

Axial acquisition with 3D reconstruction
Excellent bony details
Fast
Compatible with emergency/ ICU equipment

9

What are the negatives of CT?

Poor soft tissue detail
Multiplanar reconstruction but no direct multiplanar acquisition
Radiation

10

What are the positives of MRI?

Excellent contrast/ soft tissue resolution
Excellent depiction of anatomy
Marrow and cord pathologies
Multiplanar capability

11

What are the negatives of MRI?

Less bony detail
Less spatial resolution
Not compatible with pacemakers and many implants
Not compatible with most ICU/ emergency equipment
Not as quick as CT

12

What will T1 MRI show?

Fat and the 4 Ms:
Fat
Methemoglobin (subacute haematoma)
Mineral deposition (Ca, Mg, Mn)
Melanin (melanoma)
Mush (highly proteinaceous fluid)

13

What will a T2 MRI show?

Water:
Fluid collections, oedema, demyelination, gliosis, tumours

14

What colour is CSF in T1?

Black

15

What colour is CSF in T2?

White

16

What colour is myelin in T2?

White - fatty

17

What is a cavernoma?

A cluster of abnormal blood vessels

18

Which mode of imaging is best for trauma?

CT

19

Which mode of imaging is best for identification of aneurysms?

CT

20

Which mode of imaging is best for the spinal cord?

MRI

21

What are examples of developmental/ congenital brain conditions?

Chiari malformation
Cortical dysplasia
Polymicrogyria
Schizencephaly
Arachnoid cyst