Computed Tomography Test CT Anatomy and Clinical Applications 3

Question 1

What is the CT angiography finding that indicates aortic dissection?

Accepted Answer

An intimal flap dividing the aortic lumen into true and false channels

Answer

Aortic dissection is characterized by a longitudinal intimal tear creating a flap that separates the aorta into two lumens — the true and false channels — visible on contrast CT.

Question 2

On CT of the spine, which finding is most indicative of an acute compression fracture?

Accepted Answer

Loss of vertebral body height with band-like edema pattern on CT (marrow hyperdensity)

Answer

Acute vertebral compression fractures show loss of vertebral body height with preserved posterior elements and often show band-like hyperdensity representing compressed trabecular bone.

Question 3

Which CT finding in the lung is most associated with malignancy in a solitary pulmonary nodule?

Accepted Answer

Spiculated (irregular/stellate) margins with pleural tethering

Answer

Spiculated margins reflect infiltrative tumor growth into adjacent lung parenchyma and are the strongest morphologic predictor of malignancy in a solitary pulmonary nodule.

Question 4

CT colonography (virtual colonoscopy) is performed with the patient in which position to evaluate both the colon positions?

Accepted Answer

Both supine and prone positions

Answer

Both supine and prone acquisitions are standard for CT colonography; repositioning redistributes residual fluid and stool, allowing evaluation of dependent and non-dependent colonic segments.

Question 5

Which CT finding is the hallmark of carotid artery stenosis evaluation on CT angiography?

Accepted Answer

Percentage of luminal narrowing at the carotid bifurcation

Answer

Carotid CTA quantifies the degree of luminal stenosis (percent narrowing) at the bifurcation and proximal internal carotid artery, which determines treatment decisions for stroke risk reduction.

Computed Tomography Test Practice Test

Computed Tomography Test Practice Test

Computed Tomography Test CT Anatomy and Clinical Applications 3