types of neurological scans

Question 1

CT stands for

Answer 1

Computed Tomography Scan

Question 2

what does a ct use to pass through tissues

Answer 2

narrow-beam xrays to pass through tissues at diffrent angle

Question 3

what does a ct scan focus on

Answer 3

structures

Question 4

ct scans detect

Answer 4

brain diseases

Question 5

using a ct scan, can small structures be detected

Answer 5

no

Question 6

MRI stands for

Answer 6

Magnetic resonance imaging

Question 7

MRI has a magnetic feild of ?

Answer 7

60, 000

Question 8

during an MRI, patients are injected with what

Answer 8

a contrast dye

Question 9

MRI helps to do what

Answer 9

diagnose brain diseases such as MS, strokes, infection of brain/spine/cns and tendonitits

visulaizing injuries; such as torn ligaments, especially in areas diffuclt to see like the wrist, ankle or knee

evaluation; of masses in soft tissue, cysts, bone tumors or disc problems

Question 10

advantages of MRI

Answer 10

1. does not use ionizing radiation
2. low side effects of contrast dye
3. non invasive
4. great contrast resolution

Question 11

disdavantages of mri

Answer 11

• noisey
• size and weight
• claustrophobia
• expensive
• keeping still
• medical contraindications such as pacemakers, metal objects in body
• time consuming
• not easily availiable
• no on-call service
• it has limitations

Question 12

a type of MRI that is used to image blood vessels; is called ?

Answer 12

MRA-angiography

Question 13

MRA can help image blood vessels to detect

Answer 13

• stenosis ( narrowing of blood vessels)
• anuerysms (vessel wall dilations)

Question 14

what scan do we use for spine imagery

Answer 14

MRI

• its the first line of suspected spinal infection, cord compression, cauda equina, sciatica

Question 15

what type of MRI is used to look at functions using oxygen uptake and is based on haemoglobin ( the blood protein that binds oxygen )

Answer 15

fMRI - functional MRI

Question 16

what does fMRI measure

Answer 16

fMRI measures the oxygen used by the brain;

the most active brain areas use the most oxygen

Question 17

what is EEG used to measure for
(electroencephalograph)

Answer 17

used to measure brain activity

Question 18

how is brain activity measured via EEG

Answer 18

electrodes are placed on head and measure the average amount of activity at any point in time for the cells

Question 19

main use of EEG

Answer 19

research into brain function, diagnosis of epilepsy, and sleep disorders

Question 20

are there any risk of eeg

Answer 20

no risks of eeg unlike ct

Question 21

risk of ct scan

Answer 21

you could have an allergic reaction to the contrast dye used and you’ll be exposed to X-ray radiation

Question 22

what does MEG measure -
magnetoencephalograph

Answer 22

it measures magnetic fields that brain activity produces

Question 23

PET stands for

Answer 23

positron emission tomography - nuclear medical imaging technique

Question 24

what do you inject into the body when conducting a PET scan and why do you do so

Answer 24

half-life radioactive isotopes ( or, TRACERS) to detect gamma rays

Question 25

what can PET scans detect and help do

Answer 25

glucose matabolism in the brain, brain cancer, dementia, seizures, and help map brain function