Computed Tomography Test Computed Tomography (CT Brain) 2

Question 1

On a non-contrast CT brain, a hyperdense (bright) lesion within the basal ganglia most likely represents:

Accepted Answer

Acute hemorrhage

Answer

Acute blood is hyperdense on non-contrast CT due to the high protein content of clotted hemoglobin.

Question 2

Which CT finding is most characteristic of a subdural hematoma compared to an epidural hematoma?

Accepted Answer

Crescent-shaped collection that crosses suture lines

Answer

Subdural hematomas form a crescent shape and follow the brain contour, crossing suture lines, unlike the lenticular epidural hematoma.

Question 3

A CT brain shows a hypodense wedge-shaped area in the right MCA territory that does not enhance. This pattern is most consistent with:

Accepted Answer

Subacute ischemic infarction

Answer

A wedge-shaped hypodensity in a vascular territory without enhancement is classic for subacute ischemic infarction following blood-brain barrier breakdown.

Question 4

The 'hyperdense MCA sign' on non-contrast CT brain indicates:

Accepted Answer

Acute thrombus within the middle cerebral artery

Answer

The hyperdense MCA sign reflects acute thrombus in the proximal MCA lumen, an early sign of large-vessel occlusion.

Question 5

On CT brain, which structure normally appears hyperdense (bright) without contrast administration?

Accepted Answer

Choroid plexus

Answer

The choroid plexus is normally hyperdense due to its highly vascular nature and calcification in adults.

Computed Tomography Test Practice Test

Computed Tomography Test Practice Test

Computed Tomography Test Computed Tomography (CT Brain) 2