Cassette artifact

Case contributed by Andrew Murphy


Hyperacute onset difficulty breathing post chest pain.

Patient Data

Age: 60 years
Gender: Male

Heart size at the upper limits of normal allowing for AP projection. Tracheostomy appropriately positioned. Upper lobe vascular redistribution due to supine position. No consolidation or supine pneumothorax. Bones and soft tissues unremarkable.

Spoke and hub kind artefact due to exposure of upside-down computed photostimulable phosphor cassette.

Case Discussion

Imaging of a computed radiographic photostimulable phosphor cassette upside down results spoke like appearance. The radio-opaque lines running diagonal towards the center of the image represent the casing that holds the phospher plate.  

Often radiographers will notice this and repeat the image, however, some monitors may make it hard to appreciate, it is worth contacting the radiographer to clarify/alert the diagnostic radiographer.

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Case information

rID: 55331
Published: 30th Aug 2017
Last edited: 8th Nov 2020
System: Chest
Inclusion in quiz mode: Included
Institution: Princess Alexandra Hospital

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