Mach effect - mimicking pneumomediastinum

Case contributed by Mohammad Taghi Niknejad , 24 Nov 2012
Diagnosis not applicable
Changed by Mohammad Taghi Niknejad, 24 Sep 2022
Disclosures - updated 16 Jul 2022: Nothing to disclose

Updates to Case Attributes

Presentation was changed:
TraumaHistory of recent trauma with chest pain.
Body was added:

Mach effect is an optical effect at the margin between areas of slightly different density and may mimic pneumomediastinum.

  • +<p><a href="/articles/mach-bands">Mach effect</a> is an optical effect at the margin between areas of slightly different density and may mimic <a title="Pneumomediastinum" href="/articles/pneumomediastinum">pneumomediastinum</a>.</p>

Updates to Study Attributes

Findings was changed:

A lucent line between the right cardiac border and adjacent lung parenchyma suggests a mach effect is an optical effect at the margin between areas of slightly different density.In this image mimics a pneumo-mediastinum .

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