Oxygen masks

Last revised by Arlene Campos on 8 May 2024

Oxygen masks are commonly visible on chest imaging, as they are generally not removed before the examination is performed. 

Radiographic features

Plain radiograph

Oxygen masks are of soft-tissue density and may mimic lung lesions. A nebuliser mask with liquid in its cup causing an air-fluid level can look like a lung abscess 1

Oxygen tubing that projects over the chest on a frontal projection, especially in a midline craniocaudal orientation, may be difficult to see and confused with a nasogastric tube. To prevent this, it can be useful to look for connectors at the periphery of the image and review other images too.

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