Final answer:
Arthrography is a medical imaging technique that uses a contrast agent to visualize soft tissues within joints, which is particularly useful for detecting early degenerative changes in conditions like Rheumatoid Arthritis.
Step-by-step explanation:
Arthrography is a diagnostic procedure used in medicine to visualize the internal structure of joints. Specifically, arthrography utilizes a contrast agent that is opaque to X-rays to enhance the image quality of the soft tissues within a joint. In cases where an image appears bloody, presumably due to bleeding within the joint, the clarity of an arthrogram can be imperative for accurate diagnosis and treatment. Rheumatologists often employ this technique to detect early degenerative changes in joint cartilage, particularly in conditions such as Rheumatoid Arthritis (RA). An arthrogram can show the surface of soft tissues lining the joint, including cartilage, tendons, and ligaments, which provides a more comprehensive view than a standard X-ray.