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Lung Collapse

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Left lower lobe collapse

Volume losson left

Trachealdeviation

towards left Sail sign

Silhouettewith left

hemidiaphragm

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Right upper lobe collapse

Volume loss Horizontal

ssurepulled up

Trachealdeviation toright

Reverse Ssign ofGolden

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Reverse S sign of Golden

ass inrighthilumcausingobstruction

Collapse

of rightupperlobe

Reverse S

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Right lower lobe collapse Volume loss

Tracheal deviation

Right heartborder remainsclear !i#e L not

involved" Triangular opacit$

at medial base ofright lung

edial aspect ofdome of righthemidiaphragmlost

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Right middle lobe collapse

%indings ma$ besubtle

Loss of rightheart border

Horizontalssure not seen

&ncreasedopacit$ ad'acent

to right heartborder !re(uirea degree ofconsolidation"

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Right middle lobe collapse

)n lateralpro'ection*right L

collapseappears as atriangularopacit$overl$ingthe cardiacshadow

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Left upper lobe collapse

Volume loss Veil li+e

appearance

Right hilarmass

Luftsichel

sign !aircrescent"

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Luftsichel sign !air crescent" Seen in some left ,L

collapse

&n L ,L collapse*collapsed lungsilhouettes the aortic+nuc+le - aortic outlinehence is lost

&n some cases* there iscompensator$h$perin.ation of theapical segment of theleft LL

&nterposed betweenaortic arch and

collapsed L ,L /isplacing collapsed left

upper lobe laterall$from mediastinum

0roducing an aircrescent sign