Working Groups

About the GRID/Lattice, FLASH & Microbeam Radiation Therapy Working Groups

The Radiosurgery Society® (RSS) has made a collaborative effort to create three Working Groups (Clinical, Physics and Biology) to address the clinical and scientific facets of GRID/Lattice, FLASH and Microbeam radiation therapies, with the goal of conducting research to advance clinical treatments for patients. Members of the GRID/Lattice, FLASH and Microbeam Working Groups are experts in the fields of radiobiology, medical physics and radiation oncology who work collectively to understand the biology, technical and physical parameters, and clinical practice of these emerging technologies.


  • Soren Bentzen, PhD
    University of Maryland, Baltimore, MD
  • Robert J. Griffin, PhD
    University of Arkansas for Medical Sciences, Little Rock, AR
  • Charles Limoli, PhD
    University of California, Irvine, Irvine, CA


  • Xiaodong Wu, PhD
    SPHIC, Shanghai, China
  • Hualin Zhang, PhD
    Northwestern University, Northwestern Memorial Hospital, Chicago, IL


  • Sha Chang, PhD, FAAPM, DABR
    University of North Carolina School of Medicine, Chapel Hill, NC


    • Nina A. Mayr, MD, FASTRO, FAAAS
      University of Washington, Seattle, WA
    • Charles B. Simone, II, MD, FACRO
      New York Proton Center, New York, NY


    • Majid M. Mohiuddin, MD
      Advocate Lutheran General Hospital, Park Ridge, IL
    • James W. "JW" Snider, III, MD
      University of Alabama at Birmingham School of Medicine, Birmingham, AL


    Advancements in GRID/Lattice and FLASH Radiotherapy Symposium

    Thursday, March 3, 2022, 7:45 AM - 4:45 PM PT, Omni Hotel, Carlsbad, CA

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    ASTRO/RSS Joint Session - Heterogeneous Tumor Dose and Spatial Fractionated Therapy

    Sunday, October 24, 5:00 PM CT, McCormick Place West, Room W186, Chicago, IL

    This session will be moderated by Robert Griffin, PhD, and will cover the basic science, medical physics and clinical knowledge of spatially fractionated radiation therapy (SFRT) treatments as well as partial tumor exposures that when added to a treatment regimen have resulted in similar or better outcomes than standard radiation therapy alone.  Expert speakers including Drs. Nina Mayr, William Regine, Jason Luke, Adriana Haimovitz-Friedman and Sha Chang will describe current recommendations for applying spatial fractionation and interpret and predict the potential benefit of applying SFRT to metastatic anatomically difficult tumor volumes.


    Working Group Publications

    Radiation Research Special Issue: New Beam Delivery Modalities are Shaping the Future of Radiotherapy

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    Implementation of New Biology-Based Radiation Therapy Technology: When Is It Ready So Perfect Makes Practice?

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    Understanding High-Dose, Ultra-High Dose-Rate and, Spatially Fractionated Radiotherapy

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    The RSS, in collaboration with the National Institutes of Health, have hosted 2 GRID/Lattice, FLASH & Microbeam Radiation Therapy Workshops. Abstracts from both meetings are available to the public and videos and presentations are available to RSS Members. Use the links below to find out more.

     RSS GRID/Lattice, FLASH and Microbeam Radiation Therapies 2020 Virtual Session

    Available FREE to members.

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    Workshop on Understanding High-Dose, Ultra-Dose-Rate and Spatial Fractionated Radiotherapy

    August 21, 2018

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    Interested in Learning More?

    Wendy Burman
    Program Coordinator

    For full details about the
    GRID/Lattice, FLASH & Microbeam Working Groups