Introduction to Neural Imaging

Question 1

scan that produces images of the CNS in sections that have a reasonably high resolution with differentiation of grey & white matter structures

Answer 1

MRI

Question 2

2 primary types of MRI’s

Answer 2

1. T1 - fast resonance
2. T2 - fast resonance

Question 3

fields are enhance by radio frequency pulse

Answer 3

T1 - fast resonance (MRI)

Question 4

fields are canceled by radio frequency pulse

Answer 4

T2 - slow resonance (MRI)

Question 5

what white matter looks like in T1 MRI

Answer 5

light grey

Question 6

what white matter looks like in a T2 MRI

Answer 6

dark grey

Question 7

enhanced tumor in a T1 MRI is what color?

Answer 7

white

Question 8

enhanced tumor in a T2 MRI is what color?

Answer 8

rarely done

Question 9

dark grey

Answer 9

edema (blood) in a T1 MRI is what color?

Question 10

edema (blood) in a T2 MRI is what color?

Answer 10

light grey to white

Question 11

grey matter in a T1 MRI is what color?

Answer 11

dark grey

Question 12

grey matter in a T2 MRI is what color?

Answer 12

light grey

Question 13

fat in a T1 MRI is what color?

Answer 13

white

Question 14

fat in a T2 MRI is what color?

Answer 14

grey

Question 15

CSF in a T1 MRI is what color?

Answer 15

very black

Question 16

CSF in a T2 MRI is what color?

Answer 16

very white

Question 17

___ is very black in a T1 & T2 MRI

Answer 17

bone & air

Question 18

__ is dark grey in a T1 & T2 MRI

Answer 18

muscles

Question 19

___ is dark grey in a T1 MRI

Answer 19

acute infarct, subactue infarct, acute ischemia, subacute ischemia

Question 20

___ is light grey to white in a T2 MRI

Answer 20

acute infarct, subactue infarct, acute ischemia, subacute ischemia

Question 21

variable color for a T1 & T2 MRI is what

Answer 21

tumor

Question 22

substance that allows visualization of the vascular pattern in the brain and also enhances tumors that lack a blood brain barrier

Answer 22

gadolinium compound

Question 23

visualization of myelinated axonal pathways in the brain and spinal cord

Answer 23

Diffusion Tensor Imaging

Question 24

Detects radioactive precursors introduced into the brain

Answer 24

SPECT/PET (single photon/positron emission computed tomography)

Question 25

Flow of blood can be detected with MRI from paramagnetic effects of what?

Answer 25

deoxygenated hemoglobin

Question 26

Radioactive substance that emits a position on decay

Answer 26

PET Scan

Question 27

looking from the patient's feet

Answer 27

Axial observer

Question 28

looking at the patients face

Answer 28

Coronal observer

Question 29

Cerebral Vasculature can be imaged by

Answer 29

MRI and cerebral angiography