Karolyn M Hopfensperger, PhD

 Karolyn Hopfensperger
Clinical Assistant Professor of Radiation Oncology
Medical School
University of Michigan–Ann Arbor
Radiation Oncology - Physics
1500 East Medical Center Drive
Ann Arbor, Mi 48103-5010
[email protected]
Available to mentor
Karolyn M Hopfensperger, PhD
Karolyn Hopfensperger
Clinical Assistant Professor
  • About
  • Qualifications
  • Research Overview
  • Recent Publications

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    • About

    Dr. Hopfensperger received her PhD in Biomedical Engineering at the University of Iowa. She completed her Therapeutic Medical Physics residency at Huntsman Cancer Institute at the University of Utah. She joined the Medical Physics faculty at Michigan Medicine in 2023.

    Qualifications
    • Therapeutic Medical Physics Residency
      Huntsman Cancer Institute, University of Utah, Salt Lake City, Utah, United States
      2020 - 2022
    • PhD, Biomedical Engineering
      University of Iowa, Iowa City, Iowa, United States
      2020
    • BS, Electrical Engineering
      University of Wyoming, Laramie, Wyoming, United States
      2015

    Research Overview

    Areas of Interest:
    Novel brachytherapy applicators and isotopes
    Monte Carlo analysis
    Out-of-field dose measurement
    Clinical trials
    Education and outreach

    Recent Publications

     See All Publications
    • Proceeding / Abstract / Poster
      Comparison of Two Dose Calculation Algorithms to In Vivo Dose Measurements for Cardiac Implantable Electronic Device Located at Distances Less than 10 Cm from Field Edge in External Beam Radiation Therapy
      Hopfensperger K, Taylor A, Moncion A. 2025 Sep 27;
    • Journal Article
      Estimates of cardiac implanted electronic device neutron dose for a pencil beam scanning proton therapy system
      Hopfensperger KM, Li W, Sheldon SH, Rotondo RL, Chen RC, James SS, Lin Y. Medical Physics, 2025 Jul 1; 52 (7): DOI:10.1002/mp.17987
      PMID: 40665543
    • Presentation
      Data Sharing and Secondary Use
      Matuszak M, Quirk S, Roth TM, Rosu-Bubulac M, Roumeliotis M, Hopfensperger K. 2024 Aug 27;
    • Proceeding / Abstract / Poster
      Estimates of Cardiac Implanted Electronic Device Dose for the Proteus One Proton Therapy System
      Hopfensperger K, Li W, Sheldon S, Rotondo R, Chen R, St. James S, Lin Y. 2024 Jul 21;
    • Journal Article
      A re-activation model for 169Yb intensity modulated brachytherapy sources accounting for spatiotemporal isotopic composition
      Flynn RT, Smith BR, Adams QE, Patwardhan K, Graves SA, Hopfensperger KM. Medical Physics, 2024 May 1; 51 (5): 3604 - 3618. DOI:10.1002/mp.17048
      PMID: 38558460
    • Journal Article
      The population percentile allowance method for determining systematic spatial error tolerances for temporary intensity modulated brachytherapy
      Hopfensperger KM, Adams QE, Kim Y, Wu X, Xu W, Patwardhan K, Flynn RT. Medical Physics, 2023 Oct 1; 50 (10): 6469 - 6478. DOI:10.1002/mp.16668
      PMID: 37643427
    • Journal Article
      Measurements of fetal dose with Mevion S250i proton therapy system with HYPERSCAN
      Hopfensperger KM, Li X, Paxton A, Sarkar V, Su FCF, Price RG, Salter B, St. James S. Journal of Applied Clinical Medical Physics, 2023 May 1; 24 (5): DOI:10.1002/acm2.13957
      PMID: 37043346
    • Patent
      Apparatus and method for rotating shield brachytherapy
      Flynn R, Kim Y, Wu X, Hopfensperger K, Adams Q. 2023 Jan 3;