Eventration: Diaphragmatic contour is eccentric, with upward bulging of affected portion of diaphragm
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Usually anteromedial aspect of right hemidiaphragm
Paralysis: Asymmetric elevation of involved hemidiaphragm with basal atelectasis
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US
Sonography superior to fluoroscopy for diaphragmatic abnormalities
Diaphragmatic paralysis: No motion or paradoxical motion during inspiration
Eventration seen best during inspiration
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Chest fluoroscopy
Paralysis: Movement of affected hemidiaphragm is paradoxical (upward during inspiration or sniff test)
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Mediastinum shifts away from paralyzed side during inspiration
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Much less sensitive for bilateral paralysis
Related
Diagnostic Imaging_ Gastrointes - Michael P Federle
