reverse halo - cryptogenic organising pneumo
bronchiectass - signet ring
pneuatoceles - strep pneumonia
bulging fissure sign - kleb pneumonia
golden s sign - right upper lobe collapse
egg shell calcification - silicosis,sarcoidosi
split pleura - empyema
air crescent sign - fungal ball in cavity
rising sun - sign - ruptured hydatid cyst
popcorn calcification - hamartoma pulmonary
westernark/hampton hump - pulm embolism