For centuries, people have tried to understand the workings of the human body. The ancient Greeks used dissection to learn. In 1895, a German physicist discovered X-rays, opening a window for scientists to peer inside at bones. Anke Henning, Ph.D., Director of the Advanced Imaging Research Center, looks at the history of imaging and how new complementary technologies such as CT, MRI, PET, and ultrasound offer detailed information about patients.