1. What is the most common primary malignant bone tumor?
a) Osteosarcoma
b) Ewing’s Sarcoma
c) Chondrosarcoma
d) Multiple Myeloma
Answer: a) Osteosarcoma
2. Which of the following conditions is characterized by the presence of “ground-glass” opacities on chest radiographs?
a) Pulmonary edema
b) Pneumonia
c) Interstitial lung disease
d) Emphysema
Answer: c) Interstitial lung disease
3. The “double bubble” sign is seen in which of the following conditions?
a) Hirschsprung disease
b) Duodenal atresia
c) Meconium ileus
d) Intussusception
Answer: b) Duodenal atresia
4. What is the hallmark radiological feature of osteoarthritis?
a) Bone spurs
b) Joint space narrowing
c) Subchondral sclerosis
d) All of the above
Answer: d) All of the above
5. Which pathology demonstrates a “thumbprint sign” on a radiograph?
a) Epiglottitis
b) Croup
c) Laryngomalacia
d) Foreign body aspiration
Answer: a) Epiglottitis
6. “Honeycombing” on high-resolution CT (HRCT) of the lungs is most suggestive of which condition?
a) Pulmonary embolism
b) Idiopathic pulmonary fibrosis
c) Sarcoidosis
d) Bronchiectasis
Answer: b) Idiopathic pulmonary fibrosis
7. Which of the following is most commonly associated with a “snowstorm appearance” on ultrasound?
a) Ectopic pregnancy
b) Hydatidiform mole
c) Ovarian torsion
d) Appendicitis
Answer: b) Hydatidiform mole
8. What is the most common cause of a “sunburst pattern” in a bone tumor on radiograph?
a) Osteosarcoma
b) Ewing’s sarcoma
c) Chondrosarcoma
d) Giant cell tumor
Answer: a) Osteosarcoma
9. The “string of pearls” sign in abdominal imaging is indicative of what condition?
a) Crohn’s disease
b) Small bowel obstruction
c) Appendicitis
d) Colitis
Answer: b) Small bowel obstruction
10. A “bat-wing” appearance on chest X-ray is most commonly seen in:
a) Pulmonary edema
b) Pulmonary embolism
c) Tuberculosis
d) COPD
Answer: a) Pulmonary edema
11. What is the most common radiologic feature of multiple sclerosis (MS) on MRI?
a) Butterfly glioma
b) Dawson’s fingers
c) Gadolinium enhancement
d) Diffuse axonal injury
Answer: b) Dawson’s fingers
12. A “flask-shaped” heart on chest X-ray is associated with which condition?
a) Pericardial effusion
b) Cardiomyopathy
c) Pulmonary hypertension
d) Pleural effusion
Answer: a) Pericardial effusion
13. Which sign on CT is characteristic of pneumoperitoneum?
a) Rigler’s sign
b) Stellate sign
c) Kehr’s sign
d) Murphy’s sign
Answer: a) Rigler’s sign
14. What is the most common benign bone tumor?
a) Osteochondroma
b) Giant cell tumor
c) Enchondroma
d) Aneurysmal bone cyst
Answer: a) Osteochondroma
15. Which of the following is a hallmark radiologic feature of ankylosing spondylitis?
a) Bamboo spine
b) Osteophyte formation
c) Sacroiliac joint narrowing
d) Lytic lesions
Answer: a) Bamboo spine
16. “Eggshell calcification” of the lymph nodes on chest radiography is typically seen in:
a) Sarcoidosis
b) Tuberculosis
c) Silicosis
d) Histoplasmosis
Answer: c) Silicosis
17. A “tram-track” appearance on chest CT is indicative of which condition?
a) Bronchiectasis
b) Cystic fibrosis
c) Pneumothorax
d) Tuberculosis
Answer: a) Bronchiectasis
18. The “apple core” lesion is associated with which of the following conditions?
a) Esophageal cancer
b) Colorectal cancer
c) Gastric cancer
d) Pancreatic cancer
Answer: b) Colorectal cancer
19. Which of the following describes a characteristic feature of glioblastoma on MRI?
a) Butterfly appearance
b) Ring enhancement
c) Hyperintense lesion
d) All of the above
Answer: d) All of the above
20. What radiological sign is commonly seen in slipped capital femoral epiphysis (SCFE)?
a) Ice-cream slipping off cone sign
b) Crescent sign
c) Double line sign
d) Bony spur
Answer: a) Ice-cream slipping off cone sign
21. Which of the following is a feature of a benign thyroid nodule on ultrasound?
a) Hypoechoic texture
b) Microcalcifications
c) Well-defined margins
d) Taller-than-wide shape
Answer: c) Well-defined margins
22. The “Crescent sign” on MRI is a hallmark of which condition?
a) Avascular necrosis
b) Osteosarcoma
c) Ewing’s sarcoma
d) Paget’s disease
Answer: a) Avascular necrosis
23. What radiological finding is often seen in congenital diaphragmatic hernia?
a) Bowel loops in the thorax
b) Enlarged cardiac silhouette
c) Pneumothorax
d) Pleural effusion
Answer: a) Bowel loops in the thorax
24. The characteristic imaging finding in “bowel ischemia” is:
a) Pneumatosis intestinalis
b) Dilated bowel loops
c) Thumbprinting
d) Free air under diaphragm
Answer: a) Pneumatosis intestinalis
25. “Codman’s triangle” is a classic feature in which bone pathology?
a) Osteosarcoma
b) Chondrosarcoma
c) Ewing’s sarcoma
d) Osteoid osteoma
Answer: a) Osteosarcoma
26. The characteristic appearance of a “football sign” on radiograph indicates:
a) Pneumoperitoneum
b) Pleural effusion
c) Pneumothorax
d) Ascites
Answer: a) Pneumoperitoneum
27. The “tree-in-bud” pattern seen on HRCT of the chest is most indicative of:
a) Bronchitis
b) Tuberculosis
c) Pneumonia
d) Bronchiolitis
Answer: d) Bronchiolitis
28. Which of the following is a radiographic hallmark of lead poisoning?
a) Lead lines at the metaphyses
b) Subperiosteal bone resorption
c) Bone within a bone appearance
d) Ivory vertebra
Answer: a) Lead lines at the metaphyses
29. The “salt and pepper” skull appearance is associated with:
a) Hyperparathyroidism
b) Osteomalacia
c) Paget’s disease
d) Rickets
Answer: a) Hyperparathyroidism
30. The “collar sign” in gastrointestinal imaging is indicative of:
a) Intussusception
b) Volvulus
c) Hiatal hernia
d) Duodenal ulcer
Answer: c) Hiatal hernia