An X-ray of the knee joint is a common imaging test used to look at the bones around your knee and check for injuries or conditions.
What it shows
A knee X-ray focuses mainly on bones, including:
- The femur (thigh bone)
- The tibia (shin bone)
- The patella (kneecap)
It can help detect:
- Fractures or cracks
- Dislocations
- Signs of arthritis (like joint space narrowing or bone spurs)
- Bone infections or tumors
What it doesn’t show well
X-rays are not great for soft tissues like:
- Ligaments (e.g., ACL)
- Cartilage
- Tendons
For those, doctors often recommend an MRI scan.
What the X-ray looks like
A typical knee X-ray is taken from different angles (front, side, sometimes a “skyline” view of the kneecap). It appears in black and white:
- Bones look white
- Joint spaces appear darker
- Soft tissues are faint
When it’s usually ordered
Doctors may suggest a knee X-ray if you have:
- Persistent knee pain
- Swelling
- Injury or trauma
- Difficulty walking or bending
If you want, I can show you a sample knee X-ray image and explain how to read it step by step.
