Evidence map›Paper›PMID 40268691›Full record

ArticleMedical physics2025

Characterization of commercial detectors for absolute proton UHDR dosimetry on a compact clinical proton synchrocyclotron.

Jufri Setianegara, Aoxiang Wang, Nicolas Gerard, Jarrick Nys, H Harold Li, Ronald C Chen, Hao Gao, Yuting Lin

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 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing 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

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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

4 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Jufri SetianegaraDepartment of Radiation Oncology, University of Kansas Medical Center, Kansas City, Kansas, USA.
Aoxiang WangDepartment of Radiation Oncology, University of Kansas Medical Center, Kansas City, Kansas, USA.
Nicolas GerardIon Beam Applications (IBA), Louvain-la-Neuve, Belgium.
Jarrick NysIon Beam Applications (IBA), Louvain-la-Neuve, Belgium.
H Harold LiDepartment of Radiation Oncology, University of Kansas Medical Center, Kansas City, Kansas, USA.
Ronald C ChenDepartment of Radiation Oncology, University of Kansas Medical Center, Kansas City, Kansas, USA.
Hao GaoDepartment of Radiation Oncology, University of Kansas Medical Center, Kansas City, Kansas, USA.
Yuting LinDepartment of Radiation Oncology, University of Kansas Medical Center, Kansas City, Kansas, USA.

Funding

Novel Optimization Methods and Treatment Planning System for Clinically-Deliverable Truly-Hybrid Proton-Photon RadiotherapyR37CA250921 · NCI · UT SOUTHWESTERN MEDICAL CENTER · PI Hao Gao · 2021 to 2026
$2.2M
Simultaneous dose and dose rate optimization for clinical FLASH proton radiotherapyR01CA261964 · NCI · UT SOUTHWESTERN MEDICAL CENTER · PI GAO, HAO · 2022 to 2025
$2.0M
Ultrafast FLASH radiation therapy dosimetryR21CA274193 · NCI · UNIVERSITY OF KANSAS MEDICAL CENTER · PI LI, HAROLD HUI, ROYON, CHRISTOPHE · 2023 to 2024
$389k
NCI NIH HHS R01 CA261964NCI NIH HHS R21 CA274193NCI NIH HHS R37 CA250921NIH HHS R01CA261964NIH HHS R21CA274193NIH HHS R37CA250921
6 · The paper itself

Abstract

backgroundModern compact proton synchrocyclotrons can achieve ultra-high dose rates ( PURPOSE: In this work, we investigate the suitability of various commercial radiation detectors for accurate proton UHDR dosimetry using PBS proton beams from a compact proton synchrocyclotron (IBA ProteusONE). This is achieved by cross-calibrating them with conventional dose rates, measuring UHDR recombination (P

methodsAn IBA ProteusONE synchrocyclotron was initially tuned to achieve UHDRs with 228 MeV protons at 0° gantry angle. Various detectors, including Razor Chamber, Razor Nano Chamber, Razor Diode, and microDiamond, were cross-calibrated against a PPC05 plane-parallel ionization chamber (PPIC) that had an ADCL calibration coefficient of 59.23 cGy/nC. Then, all ionization chambers were exposed to UHDR protons with the P

resultsFaraday cup measurements were performed for a single spot proton UHDR beam, and the nozzle current at the isocenter was determined to be 129.5 nA during UHDR irradiations at 98.61% of the maximum theoretical dose rate. Repeated Faraday cup measurements of the UHDR beam yielded a percentage standard deviation of 0.8%, which was higher than 0.120% when similar repeated measurements were performed with conventional proton beams. P

conclusionIn this work, we comprehensively evaluated the suitability of various commercial detectors for absolute dosimetry with a pulsed UHDR beam structure from a proton synchrocyclotron. PPC05 had the lowest ionic recombination correction compared to Razor and Razor Nano ion chambers. Other than the diode detector, all other investigated detectors (PPC05, Razor, Razor Nano, microDiamond) were within ± 1% of one another and can be used for accurate absolute proton UHDR dosimetry.

Indexed as

ProtonsProton TherapyRadiation DosageRadiometryProtonsBoag theorycompact ionization chambersdiode detectorsIAEA TRS‐398ionization chambersion recombinationmicroDiamond detectorsNiatel modelpencil beam scanning (PBS)plane‐parallel ionization chambers (PPIC)proton FLASHpulsed beamultra‐high‐dose‐rate

Identifiers

PMID40268691
PMCPMC12817210

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