Leadership Team

Dr. David B. Larson, Vice Chair for Education and Clinical Operations

David B. Larson, MD, MBA, is the Vice Chair for Education and Clinical Operations in the Department of Radiology at Stanford University. He is a national thought leader in radiology quality improvement and patient safety, and a regular speaker regarding topics ranging from pediatric CT radiation dose optimization to radiologist peer review. He is the executive director of Stanford’s Realizing Improvement through Team Empowerment (RITE) program and co-director of the Clinical Effectiveness Leadership Training (CELT) program. He also leads the Stanford Medicine Improvement Capability Development Program.

Prior to his position at Stanford, Dr. Larson was the Janet L. Strife Chair for Quality and Safety in Radiology and a faculty member of the James M. Anderson Center for Health Systems Excellence at Cincinnati Children’s Hospital in Cincinnati, Ohio. He holds MD and MBA degrees from Yale University and completed his training at the University of Colorado Health Sciences Center in Denver, Colorado. Dr. Larson is a pediatric radiologist at Lucile Packard Children's Hospital at Stanford and lives with his wife, Tara, and four children in Portola Valley, California.

Dr. Christopher F. Beaulieu, Associate Chair of Education

Christopher F. Beaulieu MD, PhD, is Professor of Radiology, Associate Chair of Education, and former Chief of Musculoskeletal Imaging at Stanford. He received his MD degree and a PhD degree in Biological Structure from the University of Washington in Seattle, WA.  He was a resident and Chief Resident at Duke University in Durham, NC.  He completed a fellowship in Body Imaging at Stanford University and was a visiting fellow in musculoskeletal imaging at the University of California, San Diego. His current research focuses on image processing, imaging informatics, and artificial intelligence in radiology. 

Dr. Payam M. Massaband, Residency Program Director

Payam has been a staff radiologist at the VA Palo Alto since graduating from Radiology residency and fellowship at Stanford in 2010. As Chief of Radiology at the VA Palo Alto and Stanford Radiology Residency Program Director he concentrates on clinical excellence, process improvement and residency education. 

Dr. Gloria Hwang, Associate Program Director

Gloria is a graduate of Stanford’s School of Medicine, Surgery Internship, Radiology Residency, and Interventional Fellowship. She joined the faculty in 2008 after an additional postdoctoral research year, and has been a key member of the Radiology Residency and Interventional Radiology Fellowship interview panels for several years, as well as representing our department in the School of Medicine Faculty Senate.

Dr. Michael Iv, Associate Program Director

Michael completed a two-year Neuroradiology fellowship at Stanford and subsequently joined the faculty in 2013. In addition to his interests in brain tumor and vascular imaging, he is actively involved in medical student, resident, and fellow education and research. He serves as a co-director of the Neuroradiology clerkship for medical students and has been a member of the Radiology Residency and Neuroradiology fellowship interview and selection committees.

Dr. Ali Tahvildari, Associate Program Director

Ali is a graduate of Emory University radiology residency and Stanford Body Imaging Fellowship. He has been on faculty at the Palo Alto VA since 2013. He has participated in the residency recruitment process in the past as a faculty screener. He has worked hard to improve the resident education at the VA and was awarded the Junior Faculty Teaching Award by the radiology residents for these efforts.

Dr. Erika Rubesova, Associate Program Director  

Erika trained and worked as a Pediatric Radiologist in Brussels, Belgium before joining the faculty at Lucile Packard Children's Hospital in 2005. Erika has been the Pediatric Radiology Fellowship Director since 2009 and has played an integral role in improving the Resident and Fellow experience in that capacity.

Dr. Bruce Daniel, Associate Program Director for Research

Bruce began his Stanford Radiology career as a National Cancer Institute Fellow in Body Imaging in 1995, and has been on the faculty since that time. He leads Stanford’s research efforts in MRI of breast cancer and MRI-guided interventions. Bruce is an Instructor for the “Clinical Needs and Technology” graduate course in the Bioengineering Department of the Schools of Engineering, and Medicine, and has been a mentor and advocate for many trainees and students across schools.

Administrative Team

Carine Lahitette, Education Program Manager

Carine has worked for the School of Medicine since 2013, she moved to Radiology from Vascular Surgery where she was the Residency and Fellowship Coordinator. She holds a BA in Education from France where she was born and raised before moving to the Silicon Valley in 1997. Prior to joining Stanford, Carine was a Technology Teacher and IT Director for a French-American School. As the Education Program Manager, Carine is responsible for program management, administration and supervision of the residency programs, subspecialty training fellowships, and radiology clerkship.

Tracy Lancaster, Fellowship Program Coordinator


Jason Calcagno, Residency Program Coordinator

Jason Calcagno is a Bay Area native and has worked at Stanford University since 2008.  He acquired his BS in History from Sonoma State University in 2005.  Prior to working in Radiology, Jason was in the Pathology Department at Stanford School of Medicine supporting the Transfusion Medicine Fellowship Program and Neuropathology Fellowship Program. 

Ann Vo, Clerkship and Fellowship Program Coordinator

Ann Vo is an administrative professional, frequent community volunteer, and freelance Ergonomist.  She became a member of the Stanford Community in 2015 after attaining her Bachelors in Business Administration.
In 2018, Ann sought to expand within the Department of Radiology and joined the Education Team as the Clerkship and Fellowship Coordinator. Currently, she is looking to pursue her MBA and enhance her contribution to Stanford’s success.