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BB Test 3 > Neuroradiology > Flashcards

Neuroradiology Flashcards

1
Q

What was newly approved in 2011 regarding MRI studies?

A
  • MRI-safe pacemakers.
  • Safe for patient; cannot scan over the pacemaker region
  • Good records, serial no. of pacemaker, etc. are required.
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2
Q

What is the significance of the origin of the opthalmic artery?

A
  • It is the marker that the Internal Carotid Artery (ICA) is in the subarachnoid space, so the artery at this point is completely encased in the dura.
  • Thus, at this point and beyond, an aneurysm that leaks or bursts would cause a subarachnoid hemorrhage.
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3
Q

Describe the complications caused by subarachnoid hemorrhage.

A
  • Arachnoid granulations are blocked,
  • CSF is not resorbed, ventricles expand (hydrocephalus), which leaves less room for cerebral blood, causing ischemia.
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4
Q

Identify the tagged artery in the following lateral carotid angiogram.

A

Ophthalmic artery

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5
Q

Identify the tagged artery in the AP carotid angiogram.

A

Posterior communicating artery

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6
Q

Identify the tagged artery.

A

Pericallosal artery (branch of the anterior cerebral artery)

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7
Q

What is the clinical significance of the pericallosal artery?

A

It courses above the corpus callosum, which is above the ventricular system, so the position of the pericallosal artery provides information about the ventricular system.

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8
Q

Identify the tagged artery.

A

Middle cerebral artery

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9
Q

What is tagged in this image?

A

The Sylvian point

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10
Q

What is the Sylvian point?

A

The most posterior and the most medial point of the MCA. The “end” of the MCA.

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11
Q

Where is the Sylvian triangle in the following image?

A

Sylvian triangle.

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12
Q

Describe the Sylvian triangle.

A
  • Identifies all the branches as they come out of the Sylvian fissure (top line of triangle; coming “toward you”).
  • Bottom line shows origin of the vessels.
  • Must be in the normal location and shape. If the top line is “bowed up” there is a mass elevating it, and vice versa.
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13
Q

Identify the tagged artery.

A

Posterior communicating artery.

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14
Q

What artery is the origin of PICA?

A

Vertebral a. (not Basilar!)

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15
Q

Identify the tagged artery.

A

Posterior inferior cerebral artery (PICA)

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16
Q

What is wrong with the Sylvian triangle in this image?

A
  • There is elevation of the triangle. The shape of the top portion bows up.
  • Thus, there is a lesion below. There is a mass in the temporal lobe elevating the Sylvian triangle.
    • (A frontal lobe lesion would cause the opposite, a depressed “bowed down” triangle).
17
Q

Knowing that there is a mass in the temporal lobe, what symptoms will the patient present with?

A

Seizures.

18
Q

What does water look like on a T1 weighted image?

A

LOW signal (black)

19
Q

Edema that does not involve all of the gray matter is termed?

A

Vasogenic edema

20
Q

Small collections of contrast that arise from an artery are called?

A

Aneurysms

21
Q

Describe the pathology of the following image.

A
  • Posterior communicating artery aneurysm (actual aneurysm is on the ICA - PComm is fine)
  • Sylvian point is laterally displaced. Large hypovascular area (enlarged ventricle).
22
Q

What symptoms might a patient with a Posterior communicating artyer aneurysm experience?

A

“Worst headache of my life”

23
Q

What is the pathology of this vertebral angiogram?

A

Large aneurysm of the basilar artery. There is a not-sharp, fuzzy border on one side. This is due to thrombus.

24
Q

The lesion of the following image is in what lobe?

What symptoms will the patient present with?

A
  • Parietal lobe
  • Progressive hemiparesis
25
Q

Is the lesion an infarct, a tumor, or an abscess?

A

Tumor

26
Q

What lobe is the following lesion?

What symptoms will the patient present with?

A
  • Temporal lobe
  • Uncinate fits
27
Q

What type of lesion is this?

A

Either a tumor or and abscess

28
Q

Where is the lesion in the following CT?

What symptoms will the patient present with?

A
  • Pineal gland
  • Parinaud’s Syndrome: Paralysis of upward gaze by compression of the superior colliculus

BB Test 3 (26 decks)

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