Brain Imaging-Khosla

Question 1

What is an MRI ideal for?

Answer 1

good for soft tissue detail
good for non-emergency situations
multi-planar imaging

Question 2

What is a CT ideal for?

Answer 2

emergency situations
acute hematomas & skull fractures easy to see
**can also do multi-planar imaging.

Question 3

Does CSF show up as white in T1 or T2 imaging?

Answer 3

T2.

Shows up as black in T1.

Question 4

Which nerves pass thru the jugular foramen?

Answer 4

9, 10, 11

Question 5

The internal auditory meatus complex is made up of which 2 nerves?

Answer 5

7 & 8

Question 6

Which nerve exits out of the interpeduncular fossa?

Answer 6

Nerve 3

Question 7

If you have a right hemiplesia…you had a stroke on which side?

Answer 7

left stroke

Question 8

T/F An anterior cerebral artery problem could affect your face & arm.

Answer 8

False. Would affect your lower limb…the face & arm are more lateral.

Question 9

T/F Smaller branches of arteries supply more superficial structures while the larger vessels typically supply the deeper portions of the brain.

Answer 9

False. Large vessels–>surface

Smaller Branches–deep portions of the brain

Question 10

Where does the blood supply to the thalamus & internal capsule come from?

Answer 10

branches off of anterior & middle cerebral arteries

Question 11

The sylvian fissure separates which lobes?

Answer 11

frontal & temporal lobes

Question 12

What is PICA a branch of?

Answer 12

vertebral arteries

Question 13

What does the foramen of Monro drain?

Answer 13

lateral ventricles–>3rd ventricle

Question 14

The caudate bulges into which ventricles?

Answer 14

the lateral ventricles

Question 15

What does bone look like on CT?

Answer 15

hyperintense. Really white.

Question 16

What is the most common cause of sports-related bleeding?

Answer 16

subdural hematoma

• *accounts for most lethal brain injuries
• *60% mortality rate

Question 17

What causes a subdural hematoma?

Answer 17

usu trauma, an underlying brain contusion or edema
has a rise in intracranial pressure
**see symptoms w/i 72 hrs of injury
On CT–>see deviation of falx cerebri

Question 18

What’s the deal with acoustic neuromas?

Answer 18

they cause 7th & 8th nerve dysfunction
usu benign
usu require tumor resection or radio surgery
***sensorineural hearing loss, tinnitus, vertigo, headache

Question 19

T/F Meningiomas are mostly malignant & occur in men.

Answer 19

False. Mostly benign & occur in women

Question 20

What is the cell of origin for meningiomas? What is the usu treatment?

Answer 20

origin: arachnoid cap cells
treatment: surgery for accessible tumors, radiation for others

Question 21

What are the 2 types of hydrocephalus? Which type does a colloid cyst cause?

Answer 21

communicating & non-communicating

colloid cyst-non-communicating

Question 22

If you see night sweats, fever, B cell symptoms–>which diagnosis does this point you towards?

Answer 22

lymphoma