What is the role of imaging studies in the evaluation of extrinsic disorder causes of restrictive lung disease?

Updated: Sep 16, 2020
  • Author: Jonathan Robert Caronia, DO; Chief Editor: John J Oppenheimer, MD  more...
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Evidence of nonmuscular diseases of the chest wall and associated deformities of the spinal column and ribs are readily appreciated on chest radiographs. The severity of kyphoscoliosis is determined by the Cobb angle, which, when greater than 100°, indicates severe deformity. Neuromuscular diseases are also diagnosed based on chest radiograph findings showing low volumes and basal atelectasis.

Fluoroscopy is used to assess for diaphragm paralysis. A pleural sonogram of the diaphragm can also be use to assess for diaphragm paralysis.

A positive result from a sniff test may demonstrate paradoxical upward movement of the affected diaphragm.

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