Computed Tomography Test CT Anatomy and Clinical Applications 2

Question 1

Which CT finding is characteristic of renal cell carcinoma (RCC)?

Accepted Answer

Hypervascular solid renal mass with arterial phase enhancement ≥20 HU above baseline

Answer

Non-enhancing cyst with thin walls

Answer

Calcified lesion with no enhancement

Answer

Fat-containing lesion with negative HU values

Question 2

What is the CT appearance of a renal angiomyolipoma (AML)?

Accepted Answer

Intralesional fat with HU values below −10 (macroscopic fat)

Answer

Purely cystic lesion

Answer

Homogeneous solid mass without fat

Answer

Ring-enhancing lesion with central necrosis

Question 3

On a CT urogram, which phase of imaging is used to evaluate the collecting system, ureters, and bladder?

Accepted Answer

Excretory (delayed) phase at 5–10 minutes

Answer

Arterial phase at 25 seconds

Answer

Portal venous phase at 70 seconds

Answer

Non-contrast phase

Question 4

Which structure separates the right and left lobes of the liver and is identified by an imaginary line on CT?

Accepted Answer

Main lobar fissure (Cantlie's line) from the gallbladder fossa to the middle hepatic vein

Answer

Falciform ligament

Answer

Portal vein bifurcation

Answer

Inferior vena cava

Question 5

A 'free air' (pneumoperitoneum) sign on CT of the abdomen following bowel perforation is best identified on which type of CT window?

Accepted Answer

Lung window settings applied to abdominal images

Answer

Soft tissue window only

Answer

Bone window

Answer

Mediastinal window

Question 6

What is the CT appearance of acute pancreatitis?

Accepted Answer

Pancreatic edema, peripancreatic fat stranding, and possible fluid collections

Answer

Calcified pancreas with ductal dilation

Answer

Hypervascular pancreatic mass

Answer

Normal-appearing pancreas always