Chest Imaging Flashcards
Loss of normal lung/soft tissue interface
Caused by any pathology which replaces normal air filled lungs
Silhouette Sign
Tubular outline of an airway, made by filling the surrounding alveoli with fluid or exudate. Representes open airway.
Causes: 1) Lung consolidation, 2) pulmonary edema, 3) nonobstructive collapsed lung 4) intertstital disease 5) neoplasm 6)normal expiration
Air bronchogram sign
Collapse or incomplete expansion of the lung.
Seen as linear increased density, associated with volume loss.
Atelectasis
Meniscus-shaped opacity in depdent areas
Pleural effusion
Ill-defined opacity completely obsurcing vessels.
Consolidation/infiltrates
Linear opacity, produced by thickening of interlobular septa
Often due to edema or cellular infiltration
Kerley B lines
Diffuse bilateral coarse interstial opacties with slight basilar predominance.
Flattened diaphragm.
Emphysema, empyema, **pulmonary fibrosis **
Interstial lung disease
Visceral pleural edge seen as thing, sharp white line. Air foudn peripheral to twhite line of pleura. Air rises, peripheral space dark compared to adjacent lung.
Pneumothorax
Intial phase of cardiogenic pulmonary edma mantifested as redistribution of pulmnary veins (cephalization).
Bat wing pattern
Fluid overload, renal failure, left heart failure
Pulmonary edema/cephalization
