When Dr. Paul Benson opened Be Well Medical Center in Berkley on Dec. 1, 1980, modern medical imaging was still in its infancy, and the disease that would shape much of his career didn't yet have a name. Within a few years, he was petitioning the local hospital where he had admitting privileges to treat HIV patients and watching families beg doctors to leave AIDS off death certificates out of shame. He earned a nickname in return: "the dirty AID…