Imaging the Brain Flashcards Preview

Medicine, Year 2, Block 12 (Neurological, Neuromuscular, and MSK Diseases) > Imaging the Brain > Flashcards

Flashcards in Imaging the Brain Deck (19):
1

Why should we use non-invasive brain imaging?

It preserves anatomy, structure and functions of the brain

Increases risk of morbidity, mortality, infection, trauma otherwise

2

Of all the imaging techniques used to visualise the brain, which is the least invasive?

Ultrasounds

3

What population of patients are Ultrasounds used for in brain imaging?

Mainly used for newborns / babies, can be used to visualise fontanelles

4

What conditions can be confirmed using an Ultrasound in babies / newborn?

Meningitis
Hydrocephalus
Haemorrhaging

5

X-rays are best used to visualise what structures?

Bones

6

What are the clinical uses for X-Rays in brain imaging?

Skull fractures
Surgery
Haemorrhaging

7

CT in brain imaging visualises what best?

Images structures associated with the brain i.e. skull, bone fractures but not the brain itself

8

What are the Pros of using CT scans?

- Quick process
- Little preparation
- Cheap
- Good for hard tissue i.e. bone
- Minimally invasive

9

What are the Cons of using CT scans?

- Poor for soft tissue
- Uses ionising radiation

10

MRI in brain imaging visualises what best?

Soft tissues of the brain

11

What are the Pros of using MRI scans?

- Quick process
- Little preparation
- Variety of contrast regimes

12

What are the Cons of using MRI scans?

- Expensive
- Poor sensitivity (overdiagnosis)
- Long time process

13

What technique can be used to visualise blood flow in the brain?

MRI Angiography

14

What are the clinical uses of an MRI angiography?

- Atherosclerosis
- Stenosis
- Aneurysms
- AVMs
- Guiding stent placement

15

What do CTs and MRIs use to produce their imagines?

CTs: X-Rays
MRI: Magnets

16

Which is safer, CT or MRI scans?

MRI is safer than CT scans

17

What scan can be used to visualise the chemical composition of the brain?

Magnetic Resonance Spectroscopy

18

What does PET scans measure in Brain Imaging?

Visualises metabolic activity in the brain

19

What radiopharmaceutical compound is used in PET scans?

Fludeoxyglucose (18F)