SPEX SPEX Radiology and Imaging 2

Question 1

Which finding on ultrasound is most consistent with acute cholecystitis?

Accepted Answer

Gallbladder wall thickening with a positive Murphy's sign on US

Answer

Hyperechoic bile with shadowing

Answer

Dilated common bile duct only

Answer

Intrahepatic biliary dilation

Question 2

What is the most appropriate imaging for a pregnant woman with suspected appendicitis when ultrasound is inconclusive?

Accepted Answer

MRI abdomen without contrast

Answer

CT abdomen and pelvis without contrast

Answer

Plain abdominal X-ray

Answer

Nuclear medicine scan

Question 3

A bone scan shows a 'cold' lesion in a patient with known multiple myeloma. What does this indicate?

Accepted Answer

Aggressive lesion with poor blood flow

Answer

Active bone metastasis

Answer

Osteomyelitis

Answer

Avascular necrosis

Question 4

Which finding on echocardiography is most consistent with cardiac tamponade?

Accepted Answer

Right ventricular diastolic collapse

Answer

Left ventricular hypertrophy

Answer

Mitral valve prolapse

Answer

Aortic stenosis with gradient >40 mmHg

Question 5

Which imaging modality best characterizes liver lesions detected incidentally on CT?

Accepted Answer

MRI with hepatobiliary contrast agent

Answer

PET scan

Answer

Plain abdominal X-ray

Answer

Technetium-labeled RBC scan

Question 6

What is the Westmark sign on chest X-ray in the context of pulmonary embolism?

Accepted Answer

Focal oligemia distal to an occluded vessel

Answer

Wedge-shaped peripheral opacity

Answer

Enlarged pulmonary artery

Answer

Pleural effusion on the affected side