The Centers for Advanced Orthopaedics LLC (CAO) is one of the nation’s largest Orthopaedics practices, owned and operated by physicians, with over 60 locations across Maryland, Northern Virginia, and the District of Columbia. A Limited Radiology Technologist (LRT) or Limited Scope X-Ray Technician performs basic radiographic imaging of specific body parts, such as the extremities, chest, or spine, under supervision.