CT & MR Arthrography
Arthrography is medical imaging to evaluate conditions of joints. There are several methods to do this.
Conventional arthrography is the x-ray examination of a joint that uses a special form of x-ray called fluoroscopy and a contrast material containing iodine. Alternate methods of arthrography examinations use magnetic resonance imaging (MRI) or computed tomography (CT).
Fluoroscopy makes it possible to see bones, joints and internal organs in motion. When iodine contrast is injected into the joint, it fills the entire joint and appears bright white on an arthrogram, allowing the radiologist to assess the anatomy and function of the joint.
Arthrographic images help physicians evaluate alterations in structure and function of a joint and help to determine the possible need for treatment, including arthroscopy, open surgery or joint replacement. The procedure is most often used to identify abnormalities within the shoulder, wrist, hip, knee, and ankle.
The procedure is also used to help diagnose persistent, unexplained joint pain or discomfort. Arthrography is particularly effective for detecting tears or lesions of the structures and ligaments of the joints, especially the knee, wrist and elbow, as well as rotator cuff tears or damage from a shoulder dislocation.
No special preparation is necessary before arthrography. Food and fluid intake do not need to be restricted, unless a sedative will be given.
You should inform your physician of any medications you are taking and if you have any kidney problems or allergies, especially to iodinated contrast materials. Also inform your doctor about recent illnesses or other medical conditions.
The radiologist should also know if you have any serious health problems or if you have recently had surgery. Some conditions, such as severe kidney disease, may prevent you from being given contrast material for having an MRI.
Jewelry and other accessories should be left at home if possible, or removed prior to the MRI scan.