Collapse Radiographic Features,Lobes:Different Lobes of Collapse

4th Pediatric Infectious Diseases Conference

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RADIOIMAGING OF PULMONARY INFECTIONS IN A CHILD

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Dr Priya Chudgar.
Lecturer in Radiology,
Department of Radiology,
KEM Hospital,
Mumbai.

Q) Discuss radiographic features of different types of collapse.

A: Signs of collapse can be divided as :

Lobar - shift of fissure,

crowding of airways,

increased opacity.

Extralobar - hemidiaphragm elevation,

mediastinal shift,

hilar shift/distortion,

compensatory hyperinflation,

rib approximation.

Different lobes of collapse show different features -

Right upper lobe collapse - opacity in right upper lobe with minor fissure at cephalic position & its lateral aspect is higher than medial. Adjacent mediastinal silhouette is effaced.
Right middle lobe collapse - Blurring of sharp right heart border & on lateral view, a triangular opacity with apex at hilum is seen.
Lingular collapse - Left cardiac border is ill-defined.
Lower lobe collapse - Triangular opacity in lower lobe with base on diaphragm. Hilar depression, hyperinflation of upper lobe are associated features.
Left lower lobe collapse - shows a retrocardiac triangular opacity.

Left lower lobe collapse

Right middle lobe collapse with minor effusion

Right upper and lower left lobe collapse

Next : Pleural Effusion Radiological Signs

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