IMPORTANT: We currently have a number of bugs related to image cropping and are actively trying to resolve them. In the meantime, we have disabled cropping. Apologies for any inconvenience. Stay informed: radiopaedia.org/chat

Static artifact

Case contributed by Aditya Shetty
Diagnosis not applicable
x-ray

 Black “lightning” marks noted across bilateral knee joints

Case Discussion

 Black “lightning” marks represent static electricity artifacts.

This occurs due to films being forcibly unwrapped or due to excessive flexing of film.

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.