The research objective of Richard L. Ehman, M.D., is to expand the range of tissue, organ and system characteristics that can be noninvasively evaluated with MRI techniques. Dr. Ehman is best known for his groundbreaking work in medical imaging, specifically in nuclear magnetic resonance and its use in diagnosing a variety of conditions. He is also credited with developing magnetic resonance elastography, which allows physicians to determine the stiffness of internal organs without invasive procedures. His research program is focused on developing new imaging technologies. Dr. Ehman holds more than 40 patents, and many of these inventions are widely used in medical care. His research has been supported by competitive grants from the National Cancer Institute, National Institute of Biomedical Imaging and Bioengineering, and the National Institute of Aging.