An arthrogram is an X-ray highlighting the joint space of the knee rather than the bones.


Contrast injection

Contrast material is injected into the knee cavity, and appears white on X-ray. It is usually injected under pressure, to expand the knee cavity.

Air may also be introduced instead of contrast material, and this may demonstrate soft tissues that may otherwise be difficult to visualise (eg. a plica).


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Double contrast visualization of joints. Parker LO and DeLorimier AA. Calif Med. 1953 May; 78(5): 424–427.

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