4 Join Mallinckrodt Institute of Radiology Clinical, Research Faculty

White Washington University coat hanging in front of a sunny window.

Four new faculty members have joined Mallinckrodt Institute of Radiology (MIR) at Washington University School of Medicine in St. Louis.

Emily Dunn, MD, joins the physician practice as a clinical assistant professor of radiology in pediatric imaging and will be providing teleradiology services. She previously worked in the Department of Radiology and Radiological Sciences at Johns Hopkins Hospital, where she has been an assistant professor for the past seven years.

Dunn earned a bachelor’s degree from New York University and a medical degree from Jefferson Medical College of Thomas Jefferson University in Philadelphia. She trained at SUNY Downstate Medical Center in Brooklyn, New York, for her diagnostic radiology residency and earned a pediatric body imaging fellowship from the Children’s Hospital of Philadelphia.


Michelle Lee, MD, returns to MIR as a professor of radiology in the breast imaging section. Lee was previously an associate professor of radiology and section chief of breast imaging at the Medical College of Georgia in Augusta, Georgia, since 2020. She will serve as director of breast imaging at Barnes-Jewish West County Hospital.

Lee holds many honors, including being recently inducted into the Society of Breast Imaging’s fellowship cohort. She earned a medical degree from Northwestern Medical School in Chicago and trained at MIR for both her diagnostic radiology residency and her breast imaging fellowship.


Ying Hwey Nai, PhD, joins the Precision Radiotheranostics Translation Center (PRTC) as an assistant professor of radiology. Nai’s research interests include multi-modal imaging, particularly PET/MR imaging for clinical and preclinical applications. Her research experience is focused on neuroimaging, cancer imaging and kinetic modeling.

Nai comes to MIR from the National University of Singapore, where she has been working as a research fellow. She earned her doctorate in biomedical engineering with a focus on clinical imaging research from Tohoku University in Sendai, Japan.


Amir Ata Rahnemai-Azar, MD, joins MIR as an assistant professor of radiology in the interventional radiology section. He recently completed his independent interventional radiology fellowship at MIR.

Rahnemai-Azar earned his bachelor’s degree from the University of Tehran and his doctorate from Tehran University of Medical Science. He completed a diagnostic radiology residency at the Cleveland Medical Center of Case Western Reserve University in Cleveland, Ohio.