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2. Evaluate for Diaphragm – Elevation
An elevated hemidiaphragm can be caused by a diaphragm paralysis, lung resection/pneumectomy, atelectasis and pregnancy. A pleural effusion may also result in an apparent elevation.
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3. Evaluate for Diaphragm – Depression
A depressed hemidiaphragm can be the result of asthma, COPD, a tumour or a large pleural effusion. The image below depicts flattened diaphragms as a result of bullous emphysema.
1. Evaluate for Diaphragm
On the lateral film the costophrenic (CP) angle of each hemidiaphragm (HD) should be sharp.
Right Image: Close up of CP angle of each HD. (RD = right HD and LD = left HD)
Identify: Costophrenic Sulcus
