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bhavana-krishnaiah
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TRAM LINE SIGNBronchi have a uniform calibre, do not taper and have parallel walls - seen in CYLINDRICAL BRONCHIECTASIS.
RING SHADOWSCYSTIC BRONCHIECTASIS manifests as multiple ring shadows often containing air–fluid levels
FINGER IN GLOVE SIGNDilated bronchi filled with mucus or pus result in branching tubular opacities of variable size.
V OR Y SHAPED OPACITYSecretion accumulation within bronchiectatic airways as V- or Y-shaped densities