Diaphragm

You should be able to identify both the diaphragms in a lateral view.

• If one diaphragm is missing it indicates that there is a problem in one hemi thorax.

How to identify the diaphragm

• Normal right diaphragm projects with outer ribs due to phenomenon of divergence.

  • Normal right diaphragm is lower due to the same phenomenon

• Right diaphragm is seen in its entirety, while you loose the anterior portion of left diaphragm due to heart (silhouette sign)

• Stomach bubble is seen immediately under the left diaphragm

• If you can identify fissures then it helps to see which diaphragm they contact.

Flattening of diaphragm is best assessed by lateral view