Head and brain Flashcards
T or F: Perfusion imaging usually requires a bolus of gadolinium to help visualize the activity of a lesion.
true
What sequence would be most helpful in diagnosing MS?
Sagittal FLAIR
T or F: Fat saturation techniques are valuable when imaging the orbits post contrast due to the presence of orbital fat
true
T or F: Careful timing of post contrast pituitary scans is important because eventually the pituitary gland enhances itself, as well as a microadenoma, if present
true
Propellers, Blades, MultiVane, and Jet sequences are performed to:
reduce motion artifacts
Which cranial nerve has receptors for the sense of smell?
CN I (Olfactory)
The DWI is usually performed with ______________________aligned slices.
axial
Contrast is used to assess what
tumors
metastases
age of infarct
active MS plaques
Axial slices through the brain are typically aligned with what anatomical structures
parallel to the genu and splenium of the corpus callosum
T or F: Closed and open mouth views are performed for TMJs.
true
What sequences is known for its sensitivity to magnetic susceptibility?
GRE
Alignment for the axial images of the brain, are usually set up on the ________ series of images.
sagittal
What is another word for bulging of one or both eyes
proptosis
what is a demyelinating disease of the CNS
Multiple sclerosis
Indications for and MRA of the Head include :
Intracranial vascular assessment of aneurysms and infarcts
Axial slices through the head/brain are prescribed from:
inferior to superior
what contributes to the structure of the bony orbit
lacrimal, sphenoid, and frontal
Axial images of the orbits are angled with the
optic nerve
Which of the following best describes the appearance of acute stroke on an axial DWI?
bright
For imaging of the brain, the patient is usually lying ____________on the couch/table
supine
T or F: The main source of artifact in the brain is from flow motion of the popliteal artery
false
You are performing a pituitary scan. On a sagittal image you are setting up your slices for the coronal slices. Your alignment set up should be __________________.
parallel to the sella turcica
T or F: Careful timing of post contrast pituitary scans is important because eventually the pituitary gland enhances itself, as well as a microadenoma, if present.
true
When positioning a patient for a head MRI exam, their _____________should be parallel to the couch/table
IPL
Common sources of artifact for an orbital MR exam include all of the following except:
zipper artifact
Which cranial nerve provides motor control to the muscles of mastication and relays sensory information from the face and the head
5th
what would best demonstrate hemorrhage
GRE
what sequences provides temporal resolution of enhancing lesions and indicates brain activity?
perfusion
Sagittal TMJ images are angled with
perpendicular to the mandibular condyles
What sequence can used in placed of TOF imaging
MRA and MRV
Which sequence is the most important for a stroke victim
DWI
Which landmark is used for positioning centering/localizing with the red laser light
glabella/nasion
Which lobe of the brain is scanned for seizure protocol
temporal
Sagittal slices through the head are prescribed from
left to right
Setting up the sagittal slices is best and often easiest to be achieved using the _________ series of images of the 3-plane localizer.
coronal
The b value determines the:
amount of diffusion weighting on an image
T or F: The FLAIR sequences should only be done pre-contrast due to their T1 weighting.
false
A DWI is most often acquired using a ____________ sequence.
T2 EPI
When performing a CSF study image, the sequence will be a made of a _______________slice.
sagittal
T or F: Coverage for axial slices includes the foramen magnum to the superior surface of the brain
true
what protocols would include slices through the temporal lobes
seizures
Which exam may have the most issue if the patient is wearing eye make-up
orbits
_______________slices are recommended post-contrast for the pituitary gland images
thin
To image the veins of the head:
pre-saturation pulse is placed inferior to the FOV
Axial slices prescribed for an orbit exam should be aligned/angled to:
to the optic nerve
For uncooperative patient, a tech can use a _______________series for rapid imaging
SS-FSE T2
T or F: There are four ventricles in the brain.
TRUE
Cranial nerve matching :
I
smell
Cranial nerve matching :
II
vision
Cranial nerve matching :
III
eye movement
Cranial nerve matching :
IV
turns eye downward and lateral
Cranial nerve matching :
V
chewing
Cranial nerve matching :
VI
turns eye laterally
Cranial nerve matching :
VII
controls facial expressions
Cranial nerve matching :
VIII
controls hearing and equilibrium
Cranial nerve matching :
IX
controls taste
Cranial nerve matching :
X
slows heart rate
Cranial nerve matching :
XI
controls the trapezius and SCM
Cranial nerve matching :
XII
controls tongue movement
