Before coming to Toronto in 2004, he practised breast imaging in Beer-Sheva and Jerusalem in Israel. Dr. Crystal has been a member of the Breast Imaging Standards Working Group that authored the CAR Practice Guidelines and Technical Standards for Breast Imaging and Intervention, and Chair of the Referral Guidelines Working Group for the Canadian Association of Radiologists (CAR). Dr. Crystal is actively involved in several research projects in the field of breast imaging. He authored and co-authored more than 30 peer-reviewed publications in the area of breast imaging. In recognition of his contribution to the field of Breast Imaging, in 2011 he was made a Fellow of the Society of Breast Imaging, a Society of the American College of Radiology.