Alzheimer’s disease update This time on Mayo Clinic Radio, Dr. Ronald Petersen, director of the Mayo Clinic Alzheimer's Disease Research Center, will share an update on ongoing research and the fight against Alzheimer's. Also on the program, Dr. Waleed Brinjikji, a Mayo Clinic diagnostic radiologist, will discuss interventional radiology, a specialty where radiologists not only read and interpret scans, but also take part in the actual treatment of certain conditions. And Dr. Reade Quinton, a Mayo Clinic pathologist, will discuss the work he does in anatomic pathology and share his love of magic.