Evidence map›Paper›PMID 39462477›Full record

ArticleMedical physics2025

On the acceptance, commissioning, and quality assurance of electron FLASH units.

Allison Palmiero, Kevin Liu, Julie Colnot, Nitish Chopra, Denae Neill, Luke Connell, Brett Velasquez, Albert C Koong, Steven H Lin, Peter Balter and 8 more

Abstract read
In one paragraph

Article in Medical physics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

13 citing papers in PubMed.

  1. Article
  2. Volumetric FLASH dosimetryPhysics in medicine and biology · 2026
    Article
  3. Article
  4. Article
  5. Article
  6. Investigating the oxygen dependence of FLASH-RT using electron paramagnetic resonance imaging.Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology · 2026
    Article
  7. Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

18 authors.

Allison PalmieroDepartment of Radiation Oncology, James Cancer Hospital and Solove Research Institute, The Ohio State University, Columbus, Ohio, USA.
Kevin LiuDivision of Radiation Oncology, Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.
Julie ColnotINSERM U1030, Gustave Roussy, Université Paris-Saclay, Villejuif, France.
Nitish ChopraDivision of Radiation Oncology, Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.
Denae NeillDivision of Radiation Oncology, Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.
Luke ConnellDivision of Radiation Oncology, Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.
Brett VelasquezDivision of Radiation Oncology, Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.
Albert C KoongDivision of Radiation Oncology, Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.
Steven H LinDivision of Radiation Oncology, Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.
Peter BalterDivision of Radiation Oncology, Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.
Ramesh TailorDivision of Radiation Oncology, Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.
Charlotte RobertINSERM U1030, Gustave Roussy, Université Paris-Saclay, Villejuif, France.
Jean-François GermondInstitute of Radiation Physics, Lausanne University Hospital and Lausanne University, Lausanne, Switzerland.
Patrik Gonçalves JorgeInstitute of Radiation Physics, Lausanne University Hospital and Lausanne University, Lausanne, Switzerland.
Reiner GeyerInstitute of Radiation Physics, Lausanne University Hospital and Lausanne University, Lausanne, Switzerland.
Sam BeddarDivision of Radiation Oncology, Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.
Raphael MoeckliInstitute of Radiation Physics, Lausanne University Hospital and Lausanne University, Lausanne, Switzerland.
Emil SchülerDivision of Radiation Oncology, Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.

Funding

Tumor Evolution and Metastasis ProgramP30CA016672 · NCI · UNIVERSITY OF TX MD ANDERSON CAN CTR · PI DIANE BODURKA · 1985 to 2026
$290.8M
Research Supplements to Promote Diversity in Health-Related Research: Preclinical optimization of ultra-high dose rate (FLASH) radiotherapy parameters for translational relevanceR01CA266673 · NCI · UNIVERSITY OF TX MD ANDERSON CAN CTR · PI SCHUELER, EMIL · 2022 to 2025
$3.5M
Cancer Prevention and Research Institute of Texas #RP210042MD Anderson's Division of Radiation OncologyNational Cancer Institute of the National Institutes of Health R01CA266673National Cancer Institute of the National Institutes of Health Cancer Center Support Grant P30CA016672NCI NIH HHS P30 CA016672NCI NIH HHS R01 CA266673University Cancer Foundation via the Institutional Research Grant program at MD Anderson Cancer CenterUTHealth Innovation for Cancer Prevention Research Training Program Pre-doctoral Fellowship
6 · The paper itself

Abstract

background and purposeFLASH or ultra-high dose rate (UHDR) radiation therapy (RT) has gained attention in recent years for its ability to spare normal tissues relative to conventional dose rate (CDR) RT in various preclinical trials. However, clinical implementation of this promising treatment option has been limited because of the lack of availability of accelerators capable of delivering UHDR RT. Commercial options are finally reaching the market that produce electron beams with average dose rates of up to 1000 Gy/s. We established a framework for the acceptance, commissioning, and periodic quality assurance (QA) of electron FLASH units and present an example of commissioning.

methodsA protocol for acceptance, commissioning, and QA of UHDR linear accelerators was established by combining and adapting standards and professional recommendations for standard linear accelerators based on the experience with UHDR at four clinical centers that use different UHDR devices. Non-standard dosimetric beam parameters considered included pulse width, pulse repetition frequency, dose per pulse, and instantaneous dose rate, together with recommendations on how to acquire these measurements.

resultsThe 6- and 9-MeV beams of an UHDR electron device were commissioned by using this developed protocol. Measurements were acquired with a combination of ion chambers, beam current transformers (BCTs), and dose-rate-independent passive dosimeters. The unit was calibrated according to the concept of redundant dosimetry using a reference setup.

conclusionThis study provides detailed recommendations for the acceptance testing, commissioning, and routine QA of low-energy electron UHDR linear accelerators. The proposed framework is not limited to any specific unit, making it applicable to all existing eFLASH units in the market. Through practical insights and theoretical discourse, this document establishes a benchmark for the commissioning of UHDR devices for clinical use.

Indexed as

ElectronsParticle AcceleratorsQuality Assurance, Health CareQuality ControlRadiometryRadiotherapy Dosagecommissioningelectron FLASHultra‐high dose rate

Identifiers

PMID39462477
PMCPMC11788050

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.