Flattening of the diaphragm

A.Prof Frank Gaillard et al.

Flattening of the diaphragm is the most sensitive sign on chest radiographs for the presence of hyperinflation of the lungs, usually due to emphysema 1-2.

The normal dome of each hemidiaphragm should rise at least 1.5 cm above a line connecting the costophrenic angle posteriorly and sternophrenic angle anteriorly 1.

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Article information

rID: 9201
System: Chest
Section: Approach
Synonyms or Alternate Spellings:
  • Flattened hemidiaphragms

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Cases and figures

  • Figure 1: flattening of the diaphragm measurement
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  • Case 1: marked hyperinflation
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