Mayo Clinic radiologists and staff in the Department of Radiology provide the highest-quality diagnostic and interventional imaging services in a caring and efficient manner while sustaining outstanding programs in research and education.

The Department of Radiology is fully integrated with all the medical services available throughout the Mayo Clinic enterprise. More than 70 radiologists and physicists cooperate with staff to provide diagnostic and therapeutic radiology services to patients, including 15 full-time diagnostic neuroradiologists.

From the program director

Thank you for your interest in the Neuroradiology Fellowship at Mayo Clinic in Phoenix/Scottsdale, Arizona. Our one-year, ACGME-accredited program is an exceptional opportunity to advance your training within a culture of collaboration, innovation, and excellence in patient care. With world-class faculty, cutting-edge resources like clinical 7T MRI and photon counting CT, and a steadfast commitment to education, we aim to provide a truly enriching and supportive environment for our trainees.

Mayo Clinic in Arizona specializes in the care of complex medical conditions and is a distinguished destination medical center attracting patients domestically and internationally. This unique setting affords our fellows the opportunity to master the skills required of a subspecialty neuroradiologist while enjoying the environment and lifestyle of the desert southwest.

Our fellowship experience is strongly rooted in the three-shield model of Mayo Clinic, where we focus on excellence in patient care, education, and research. Our curriculum has been carefully structured to promote clinical expertise, academic growth, and personal well-being. Trainees are engaged in a wide variety of learning experiences, including high-volume, diverse case exposure, multidisciplinary conferences, weekly didactic lectures, a robust procedural service, and protected research time. We take a proactive approach to wellness through mentorship, schedule flexibility, and institutional resources designed to support every aspect of trainee life. Feedback is actively sought and valued, helping us shape the program to best meet trainees’ needs.

Leadership and teaching opportunities are woven into the fabric of the program. Trainees are invited to take active roles in departmental committees, quality improvement initiatives, and educational development for residents and medical students. Whether your professional goals lie in clinical practice, research, or education, you will find the support and mentorship here to thrive. We look forward to welcoming you to Mayo Clinic in Arizona, where your training experience will be as transformative as it is rewarding.

Nicholas Koontz, M.D.
Neuroradiology Fellowship Program Director

Advisers and mentors

Early in your fellowship, you choose a dedicated faculty adviser who can provide comprehensive educational advice and personal support. Trainees meet with their advisers periodically throughout the program to review their progress and career goals and ensure that their educational needs are being met. Your adviser also serves as a contact point for introducing you and your family to Rochester, Minnesota, and the Mayo Clinic system.

Visiting professors

Many prominent professors visit Mayo Clinic each year. They present their work during lectures, participate in hospital rounds, and have informal discussions with trainees. You are encouraged to take full advantage of these educational opportunities.

Program leadership and faculty

In addition to caring for patients in their clinical practices, Mayo Clinic's faculty is committed to teaching and facilitating the growth of medical knowledge. Faculty members have published and lectured extensively and are highly regarded in their fields. Fellows have direct access to these individuals throughout the Neuroradiology Fellowship. Meet some of our faculty:

	Alicia Chen, M.D. Dr. Chen is a clinical instructor of radiology, who joined the Mayo Clinic in Arizona faculty in 2023. She completed a two-year neuroradiology fellowship at Massachusetts General Hospital and a diagnostic radiology residency at Mayo Clinic Rochester. She is actively involved on both the diagnostic and procedural services with particular interest and expertise in the diagnosis and treatment of spinal CSF leaks.  View full profile
	Justin Cramer, M.D. Dr. Cramer is an assistant professor of radiology, who joined the Mayo Clinic Arizona faculty in 2022. He completed a two-year neuroradiology fellowship, as well as diagnostic radiology residency at the University of Utah. His research interests are in informatics and artificial intelligence, as well as medical education. View full profile
	Geoffrey Fletcher, M.D. Dr. Fletcher is an assistant professor of radiology, who completed a neuroradiology fellowship at Mayo Clinic in Rochester, Minnesota (1995) and diagnostic radiology residency (1992). View full profile
	Joseph Hoxworth, M.D. Dr. Hoxworth is a professor of radiology and chair of the Department of Radiology at Mayo Clinic in Arizona. He completed a neuroradiology fellowship and diagnostic radiology residency at the University of California, San Francisco. His clinical and academic interests include head and neck imaging, and he has received several education awards. View full profile
	Leland Hu, M.D. Dr. Hu is a professor of radiology, who completed a two-year neuroradiology fellowship Barrow Neurological Institute and a diagnostic radiology residency at the University of Texas, Southwestern Medical School. He is the associate director of the M.D.-Ph.D. Program at the Mayo Clinic College of Medicine and Science and has a research focus in brain tumor imaging. View full profile
	Ichiro Ikuta, MD, MMSc Dr. Ikuta is an assistant professor of radiology, who completed a neuroradiology fellowship at Yale School of Medicine, biomedical informatics fellowship at Harvard, and diagnostic radiology residency at Yale School of Medicine. His research interests include informatics, artificial intelligence, high-field MRI, radiation exposure, and medical education. View full profile
	Nicholas Koontz, M.D. Dr. Koontz is an associate professor of radiology and program director for the Neuroradiology Fellowship at Mayo Clinic in Arizona. He completed a two-year neuroradiology fellowship at the University of Utah and diagnostic radiology residency at Indiana University School of Medicine. His clinical and research interests include head & neck imaging, imaging-guided procedures, and medical education. View full profile
	Dania Malik, M.D. Dr. Malik is an assistant professor of radiology, who completed a neuroradiology fellowship at the University of Maryland Medical Center and a diagnostic radiology residency at Mayo Clinic in Arizona. Her clinical expertise is in emergency and trauma imaging, and her academic interests include quality improvement and medical education. View full profile
	Nick Matthees, M.D. Dr. Matthees is an assistant professor of radiology, who completed a neuroradiology fellowship at Barrow Neurological Institute and diagnostic radiology residency at St. Joseph’s Hospital and Medical Center. He also holds a board certification in magnetic resonance safety. He is actively involved on both the diagnostic and procedural services, and he has a strong interest in medical education. He is also the associate program director for the Diagnostic Radiology Residency program. View full profile
	Ameet Patel, M.D. Dr. Patel is an Assistant Professor of Radiology, who completed a neuroradiology fellowship at Barrow Neurological Institute and a diagnostic radiology residency at State University of New York Health Science Center. He is Director of Magnetic Resonance Imaging at Mayo Clinic Arizona and is actively involved on both the diagnostic and procedural services. View full profile
	Tanya Rath, M.D. Dr. Rath is an Associate Professor of Radiology and Division Chair of Neuroradiology at Mayo Clinic Arizona. She completed a neuroradiology fellowship and diagnostic radiology residency at the University of Michigan. Her clinical expertise and research interests are in head & neck imaging. She is a Past President of the Eastern Neuroradiological Society and has a strong interest in medical education.  View full profile
	Kalen Riley, M.D., M.B.A. Dr. Riley completed a two-year neuroradiology fellowship at the University of Utah, diagnostic radiology residency at Indiana University School of Medicine, and MBA at Indiana Univeristy. His clinical and research expertise are in head & neck imaging and neurovascular imaging, including vessel wall MRI.  View full profile
	Jeffrey Ross, M.D. Dr. Ross is a Professor of Radiology, who completed a neuroradiology fellowship at University Hospitals of Cleveland/Case Western Reserve University and diagnostic radiology residency at Cleveland Clinic Foundation. He is a former chief editor for the American Journal of Neuroradiology, Past President of the Eastern Neuroradiological Society, Past President of the American Society of Spine Radiology, and Gold Medal Winner of the American Society of Spine Radiology. His clinical and research expertise is in spine imaging.  View full profile
	Vincent Timpone, M.D. Dr. Timpone is an Associate Professor of Radiology, who completed his neuroradiology fellowship at Massachusetts General Hospital and diagnostic radiology residency at David Grant USAF Medical Center at Travis Air Force Base. His clinical and research expertise are in emergency neuroimaging and imaging-guided procedures, including diagnosis and treatment of CSF leaks. View full profile
	Pattana Wangaryattawanich, M.D. Dr. Wangaryattawanich is a senior associate consultant, who completed adult and pediatric neuroradiology fellowships at University of Pittsburgh Medical Center, the Children's Hospital of Philadelphia, and the University of Texas MD Anderson Cancer Center and completed diagnostic radiology residencies at the King Chulalongkorn Memorial Hospital and the University of Pittsburgh Medical Center. His clinical expertise is in imaging of the head and neck. View full profile
	Eric Wannamaker, M.D. Dr. Wannamaker is an Assistant Professor of Radiology, who completed a neuroradiology fellowship and diagnostic radiology residency at the University of Colorado School of Medicine. His clinical expertise is in emergency neuroimaging with interests in medical education and quality improvement. View full profile