An X-ray of the knee is a common imaging test used to evaluate the bones and joint structure of the knee. It’s typically done when there’s pain, swelling, injury, or suspected arthritis.
What a Knee X-Ray Shows
- Bones: Femur (thigh bone), tibia (shin bone), and patella (kneecap)
- Joint space: Can reveal arthritis or cartilage loss indirectly
- Fractures or dislocations
- Bone spurs or other bony abnormalities
Note: X-rays do not show soft tissues like ligaments, tendons, or cartilage in detail. For those, an MRI is preferred.
Common Reasons for a Knee X-Ray
- Knee pain or swelling
- Trauma or suspected fracture
- Arthritis evaluation (osteoarthritis or rheumatoid arthritis)
- Monitoring bone healing after surgery or injury
- Detecting bone tumors or infections
How It’s Done
- You may stand, sit, or lie down, depending on the view needed.
- The technician positions your knee and takes usually 2–3 images from different angles (front, side, and sometimes oblique).
- It’s a quick procedure (a few minutes), usually painless.
Interpreting Results
- Normal: Bones are aligned, joint space is even, no fractures or bone lesions
- Fracture: Breaks in bone continuity
- Arthritis: Narrowed joint space, bone spurs, or changes in bone density
- Other issues: Loose bodies, calcifications, or deformities
💡 Tip: If you have persistent knee pain but X-ray looks normal, a MRI or ultrasound may be recommended to check ligaments, cartilage, or soft tissue injuries.
I can also make a visual guide showing common knee X-ray views and what each reveals if you want. Do you want me to do that?
