Definition of Joint x-ray:

This test is an x-ray of a knee, shoulder, hip, wrist, ankle, or other joint.

How the test is performed:

The test is done in a hospital radiology department or in the health care provider's office. The x-ray technologist will help you position the joint to be x-rayed on the table. Once in place, pictures are taken. The joint may be repositioned for different views.

How to prepare for the test:

Inform the health care provider if you are pregnant. Remove all jewelry.

How the test will feel:

The x-ray is not uncomfortable, except possibly from positioning the area being x-rayed.

Why the test is performed:

The x-ray is used to detect fractures, tumors, or degenerative conditions of the joint.

What abnormal results mean:

The x-ray may reveal arthritis, fractures, bone tumors, degenerative bone conditions, and osteomyelitis (inflammation of the bone caused by an infection).

The test may also be performed to investigate the following conditions:

• Acute gouty arthritis (gout)
• Adult still's disease
• Caplan's syndrome
• Chondromalacia patellae
• Chronic gouty arthritis
• Congenital dislocation of the hip
• Fungal arthritis
• Non-gonococcal (septic) bacterial arthritis
• Osteoarthritis
• Pseudogout
• Psoriatic arthritis
• Reiter's syndrome
• Rheumatoid arthritis
• Runner's knee
• Tuberculous arthritis

What the risks are:

There is low radiation exposure. X-rays are monitored and regulated to provide the smallest amount of radiation exposure needed to produce the image. Most experts feel that the risk is low compared with the benefits. Pregnant women and children are more sensitive to the risks of the x-ray.