For over forty years, Tristán Associates has been a leading provider of diagnostic services. With board-certified radiologists, state-of-the-art equipment, and convenient locations throughout central Pennsylvania, we provide top-quality, easily accessible, diagnostic care. Equally important to note is our focus on patient comfort. We appreciate the fact that testing of any nature can be stressful. Our doctors, technologists, and support staff work to create a comfortable environment. Because we have a doctor on-site, we can alleviate unnecessary anxiety by delivering test results quickly. In fact, in many instances, results are available before the patient leaves the facility. Tristán Associates 4518 Union Deposit Road Harrisburg, PA 17111 (717) 652 5840 (888) 452 5840 Fax - (717) 652 8152 Hours of Operation: Monday-Friday, 8:00am-5:00pm Our Staff: Dr. Shervin C. Dean, MD, Medical Director Randy Beyler, Chief Technologist Email Us