Dr Niell received her MD and PhD degrees from the University of Michigan. She completed a Diagnostic Radiology Residency at Massachusetts General Hospital, where she also served as Chief Resident. Dr Niell is a board-certified subspecialty-trained diagnostic radiologist. Her clinical practice involves interpreting mammograms, ultrasound, breast MRI and performing image-guided breast biopsies. Dr Niell is especially interested in the appropriate utilization of breast imaging, including breast MRI, mammography, and tomosynthesis, based on her background in public health.