Can ultrasound reveal how knee ligaments change with osteoarthritis?

This study uses a special ultrasound technique called shear wave elastography to measure the stiffness of knee ligaments in healthy adults and in people with knee osteoarthritis. The goal is to establish normal stiffness values across different ethnic groups and to see how ligament stiffness changes after clinically indicated injection therapy. Participants will undergo ultrasound exams and clinical assessments, with follow-up for those receiving injections.