1. Maximum permissible radiation exposure per person per year - 5 rem
2. Air crescent sign on chest radiograph - Aspergilloma
3. Hair on end/crew cut/hair brush appearance is seen in - Thalassemia
4. Crescent sign on IV urogram/pyelogram - Hydronephrosis
5. Double barrel sign on USG is seen in - Obstructive Jaundice
6. Golden-S is characteristic of- Bronchogenic Ca
7. Snow storm appearance on obstetrical USG - Hydatiform mole
8. Cobble stoning of colon is seen in - Crohn's disease
9. Kerley-B lines in CXR is diagnostic of- Heart failure
10. Egg on side appearance is seen in - Uncorrected TGA
11. Egg shell calcification in hilar nodes suggest - Silicosis
12. Water lily sign is seen in - Hydatid disease
13. Thimbled Bladder & Golfhole ureters is seen in - Renal TB
14. Notching of Ribs is seen in - Coarctation ofAorta
15. Looser's zone/pseudo # /Milk man's # are seen in - Osteomalacia
16. Tram-track appearance in skull radiograph is seen in - Sturge-weber syndrome
17. Cotton wool appearance in skull radiograph is seen in - Paget's disease of bone
18. Box-shaped heart is found in - Ebstein's Anamoly
19. Money bag/leather bottle/flask shaped heart is seen in- Pericardial effusion
20. Pericardial effusion is best diagnosed by - Echocardiography
21. Coiled spring appearance is seen in - Intussusception
22. Spoke-wheel pattern/Sun-burst appearance of calcification in bone -Hemangioma
23. Mercedes Benz sign - Air in Gall stones
24. Wimberger sign is found in - Rickets
25. Double duct sign on USG - Pancreatic Ca
26. Central Dot sign on CT scan is seen is - Caron's disease
27. Champagne glass pelvis is seen in - Achondroplasia
28. Chain of lakes appearance on ERCP - chronic pancreatitis
29. Sentinel loops on x-ray are seen in - Acute pancreatitis
30. Popcorn calcification is seen in - Pulmonary hamartoma
31. Gold standard test for pulmonary embolism - Pulmonary Angiography
32. 10C for pulmonary embolism - Contrast CT
33. 10C for most Gall bladder pathologies - USG
34. 10C in Traumatic paraplegia is - MRI
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