What Is Arthrography?
Arthrography is a method of injecting low-density gas (such as air, CO 2 ) or radiopaque contrast agent (such as iodine) into the joint cavity to visualize the structure of the cavity, which can more clearly observe the joint anatomy. However, the imaging method is invasive, and the operation is difficult, and the diagnostic accuracy is not high. Digital subtraction is used to enhance the sharpness of contrast images, but it is not widely used. Since the clinical application of CT and MRI, CT has a higher resolution for soft tissues and can directly observe different joint soft tissue structures. Generally, X-ray arthroplasty has been rarely used. For the observation of joint lesions, MRI is generally selected on the basis of plain radiographs.