Ashwin Parihar, MBBS, MD

Nuclear Medicine

Ashwin Parihar

Appointment Options

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Expertise & Training

Clinical Expertise

  • Radiology – Nuclear Medicine

Primary Academic Title

Assistant Professor of Radiology, WashU Medicine

Training

  • 2019 -2021: Senior Resident, Nuclear Medicine Postgraduate Institute of Medical Education and Research, Chandigarh, India
  • 2021 - 2022: Postdoctoral Research Associate, WashU Medicine, St. Louis, MO

Education

  • 2014: MBBS, Veer Chandra Singh Garhwali Government Medical Sciences and Research Institute, Uttarakhand, India
  • 2019: Postgraduate Institute of Medical Education and Research, Chandigarh, India

Research & Selected Publications

Research Interest

My broad research interests include tumor imaging and therapy in nuclear medicine. More specifically, I am interested in utilizing functional imaging to characterize tumors and explore suitable therapeutic targets. This is a part of ‘theranostics’ where a common/ similar molecule is used to image the tumor sites verifying adequate target expression, followed by targeted therapy using a therapeutic radioactive moiety. I am currently exploring several domains in theranostics, primarily applying it to prostate cancer, neuroendocrine tumors and lymphoid malignancies. These domains broadly include accurate patient selection, determining the most appropriate radiopharmaceutical and the activity to be administered, and assessing treatment response.

Research Publications

Superior Diagnostic Yield of 18 F-rhPSMA-7.3 Compared With 18 F-DCFPyL PET/CT for the Detection of Recurrent Prostate Cancer
Authors:

Jindal S, Manna S, Shetty A, Dehdashti F, Parihar AS

Journal & Year:

Clin Nucl Med | 2026

Comparative benchmarking of the DeepSeek large language model on medical tasks and clinical reasoning
Authors:

Tordjman M, Liu Z, Yuce M, one or more additional authors omitted Parihar AS, one or more additional authors omitted Mei X

Journal & Year:

Nat Med | 2025

Approaches to Imaging Immune Activation Using PET
Authors:

Parihar AS, Pant N, Heidari P, Fong L , Iravani A

Journal & Year:

J Nucl Med | 2025

18F-Fluoroestradiol PET/CT for Predicting Benefit from Endocrine Therapy in Patients with Estrogen Receptor-Positive Breast Cancer: A Systematic Review and Metaanalysis
Authors:

Parihar AS, Vaz S, Sutcliffe S, one or more additional authors omitted Ulaner GA

Journal & Year:

J Nucl Med | 2025

68 Ga-DOTATATE and 18 F-FDG PET/CT in a Rapidly Progressing Lymphoma
Authors:

Parihar AS, Wahl RL, Jahromi AH

Journal & Year:

Clin Nucl Med | 2025

Asymmetric 18F-FDG Uptake in Oropharynx-PET Parameters to Minimize Unnecessary Interventions
Authors:

Prasad V, Parihar AS

Journal & Year:

JAMA Otolaryngol Head Neck Surg | 2024

Quarter-Century PET/CT Transformation of Oncology: Lymphoma
Authors:

Parihar AS, Pant N, Subramaniam RM

Journal & Year:

PET Clin | 2024