unit 5

Question 1

facial nerve studies are usually done for

Answer 1

the trigeminal nerve (CN V)

Question 2

plotting the coronal for a facial nerve study :

Answer 2

cover the top of the 4th ventricle & align with the nasal septum

Question 3

on axials for facial nerve studies cover through

Answer 3

the parotid gland

Question 4

CSF studies are done to

Answer 4

determine if patient has aqueduct stenosis or hydrocephalus

Question 5

aqueduct stenosis

Answer 5

blockage of fluid

Question 6

when doing a brain for CSF flow you use a _______ on patient

Answer 6

peripheral gating probe to synchronize the MRI signal to the cardiac cycle

Question 7

what happens to blood & CSF during systole

Answer 7

blood flows into brain & CSF flows down the aqueduct of sylvius

Question 8

when setting up a sagittal for CSF brain flow

Answer 8

set up as a single midline slice , parallel to & through the 4th ventricle

Question 9

axial slices for CSF brain flow are set up

Answer 9

perpendicular to & through the aqueduct of sylvius

Question 10

one of patient’s complaints when getting IAC’s scanned

Answer 10

tinnitus (ringing in ears)

Question 11

when setting up a sagittal for an IAC coverage includes

Answer 11

the foramen magnum through the superior body of the corpus callosum

Question 12

thin slices for the coronal IAC include

Answer 12

posterior border of the cerebellum to the clivus

Question 13

IAC thin slices use a _____ FOV

Answer 13

small

Question 14

exams with thin slices are usually _______ exams (IAC)

Answer 14

long

Question 15

proptosis

Answer 15

protrusion of the eyeball

Question 16

protocol tips for orbit imaging

Answer 16

• remove eye makeup
• fine matrix
• STIR , usually needed to visualize orbit well due to high fat content of globe

Question 17

thin axial slices of the orbit are angled with

Answer 17

the optic nerve

Question 18

thin coronal orbit slices include

Answer 18

the posterior globe to the posterior aspect of the optic chiasm

Question 19

for artifacts due to blinking use

Answer 19

FSE (fast spin echo)

Question 20

to prevent flow motion, sometimes from circle of willis, use

Answer 20

sat bands , placed superior and posterior
inferior- reduces carotid flow

Question 21

when doing orbits if contrast is used ,

Answer 21

do at least one sequence of entire brain

Question 22

MRA

Answer 22

magnetic resonance angiography

Question 23

3D TOF (time of flight) provides

Answer 23

higher spatial resolution than 2D
- longer scan time & generally less artifacts

Question 24

3D TOF usually done for

Answer 24

circle of willis
- great for flow visualization
Blood shows bright

Question 25

3D TOF uses a ______ TR

Answer 25

short

Question 26

contrast is ______ used in MRA exams

Answer 26

not usually

Question 27

MRV

Answer 27

magnetic resonance venography

Question 28

MRV’s are looking at

Answer 28

venous flow of the brain

Question 29

fMRI usually uses the

Answer 29

BOLD (blood oxygen level dependent) sequences

Question 30

fMRI measures function of different areas of the brain like

Answer 30

language motor passive/thinking

Question 31

allows for planning of surgery , to see what cortex they will pass through & possible damage caused

Answer 31

fMRI

Question 32

which cranial nerve is associated with the optic nerve

Answer 32

CN II

Question 33

this technique is becoming the standard of care in neurological work

Answer 33

functional MRI (fMRI)

Question 34

what is NOT true regarding phase contrast MRA

Answer 34

it suffers from more background tissue being represented

Question 35

when performing an MRA of the cerebral arteries, a saturation band should be placed _______ to the axial slices

Answer 35

superior

Question 36

which MRA technique is typically used to evaluate the venous structures of the head

Answer 36

PC MRA

Question 37

an example of examining blood flow within a vascular network is

Answer 37

MRA

Question 38

which cranial nerves run through the IACs

Answer 38

VII & VIII