Heo, McKay and Parihar Join MIR

Headshot composite of Instructors Gyu Seong Heo, Nicole McKay and Ashwin Singh Parihar.

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

Nicole S. McKay, PhD, joins the Neuroimaging Labs Research Center as an instructor. She has been a postdoctoral research associate in the Benzinger Lab since 2019. Her research focuses on understanding the biological mechanisms that underpin cognitive decline in preclinical Alzheimer’s disease.

McKay is a 2021 McDonnell Neuroscience Postdoctoral Fellow, a 2021 Alzheimer’s Association Research Fellow and a 2022 Bright Focus Awardee. She earned her doctoral degree in psychology from the University of Auckland in New Zealand.


Gyu Seong Heo, PhD, joins the Precision Radiotheranostics Translation Center as an instructor. He has been a staff scientist in the Liu Lab since 2021. His research focuses on the development of novel radiotracers for inflammation imaging, and he has been involved in synthesizing novel peptide-based radiotracers for preclinical and translational imaging.

Heo earned his doctoral degree in chemistry from Texas A&M University and joined MIR in 2016 as a postdoctoral research scholar.


Ashwin Singh Parihar, MD, joins the Precision Radiotheranostics Translation Center as an instructor. A postdoctoral research associate in the Wahl Lab since 2021, he works on oncologic imaging and theranostics.

Parihar is the recipient of the ACNM Editorial Fellowship in clinical nuclear medicine and is a member of the 2022-23 Radiology: In Training editorial board. He earned his medical degree from Veer Chandra Singh Garhwali Government Medical Sciences and Research Institute in Uttarakhand, India, and trained as a resident in nuclear medicine at the Postgraduate Institute of Medical Education and Research in Chandigarh, India.