Computed Tomography Test CT Anatomy and Clinical Applications

Question 1

What CT finding is pathognomonic (diagnostic) for acute epidural hematoma?

Accepted Answer

Biconvex (lens-shaped) hyperdense collection adjacent to the inner table of the skull

Answer

Crescent-shaped hyperdense collection spanning the brain surface

Answer

Diffuse brain swelling with effacement of sulci

Answer

Ring-enhancing lesion with surrounding edema

Question 2

On non-contrast CT of the head, acute intraparenchymal hemorrhage typically appears as:

Accepted Answer

Hyperdense (bright white) relative to adjacent brain parenchyma

Answer

Hypodense (dark) relative to brain

Answer

Isodense to brain

Answer

Ring-enhancing

Question 3

In CT of the chest, the 'ground-glass opacity' (GGO) pattern is best described as:

Accepted Answer

Hazy increased attenuation that does not obscure underlying vessels

Answer

Complete white-out of the lung with no visible vessels

Answer

Air-filled cysts throughout the lung

Answer

Thickening of bronchial walls only

Question 4

What CT sign in the chest is used to identify a pulmonary embolism on CTPA?

Accepted Answer

Filling defect (hypodense clot) within a pulmonary artery on contrast-enhanced images

Answer

Hyperdense pulmonary artery on non-contrast CT

Answer

Consolidation with air bronchograms

Answer

Pleural effusion only

Question 5

Which CT finding best characterizes a simple hepatic cyst?

Accepted Answer

Well-defined, water-density (0–10 HU), non-enhancing lesion with imperceptible walls

Answer

Solid lesion with arterial enhancement

Answer

Lesion with internal septations and thick walls

Answer

Calcified lesion with mass effect

Question 6

On CT of the abdomen, the normal appendix should have a maximum diameter of:

Accepted Answer

Less than 6 mm

Answer

Less than 1 cm

Answer

Less than 2 cm

Answer

Size is not diagnostically relevant