Final answer:
Knee arthrography can be used to diagnose a torn meniscus or a Baker's cyst in the knee joint, while a torn rotator cuff would not be diagnosed with this procedure, as it is a shoulder injury. Arthrography is a diagnostic imaging technique, whereas arthroscopy is a surgical procedure to repair knee injuries.
Step-by-step explanation:
Knee arthrography is a medical imaging technique used to visualize the soft tissue structures of the knee joint, including cartilage, tendons, and ligaments. This procedure can be particularly useful for diagnosing certain conditions of the knee. Knee arthrography may be performed to demonstrate a torn meniscus, which is an injury to the cartilage between the thighbone and shinbone, or a Baker's cyst, which is a fluid-filled swelling behind the knee that may cause joint inflammation.
However, a torn rotator cuff is an injury to the shoulder, not the knee, and would not typically be diagnosed using knee arthrography. Instead, injuries such as a torn rotator cuff are diagnosed in the shoulder joint, potentially using shoulder arthrography or other imaging techniques more applicable to shoulder injuries.
While arthroscopy is a surgical procedure that allows doctors to view the knee joint without making a large incision, and repair issues such as a torn meniscus, arthrography is primarily a diagnostic imaging test. The arthroscope used in arthroscopic surgery provides a clear view of the interior of the knee joint and helps with surgical repairs, while arthrography provides images that can show early degenerative changes and soft tissue injuries.