Evidence map›Paper›PMID 41755805›Full record

ArticleMedical physics2026

First evaluation of a heteroepitaxial diamond ionization chamber operating at low voltage for diagnostic X-ray dosimetry.

Kiyomitsu Shinsho, Koji Koyama, Keitaro Hitomi, Mitsuhiro Nogami, Osamu Maida, Toshiyuki Onodera, Kanata Kikkawa, Shimma Hashimoto, Yuta Hirai, Yusuke Koba and 3 more

Abstract readEvaluation Study
PubMed Full text at PMC Publisher
In one paragraph

Article in Medical physics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

13 authors.

Kiyomitsu ShinshoGraduate School of Human Health Sciences, Tokyo Metropolitan University, Arakawa-ku, Tokyo, Japan.
Koji KoyamaOrbray Co., Ltd., Adachi-ku, Tokyo, Japan.
Keitaro HitomiGraduate School of Engineering, Tohoku University, Sendai, Miyagi, Japan.
Mitsuhiro NogamiGraduate School of Engineering, Tohoku University, Sendai, Miyagi, Japan.
Osamu MaidaGraduate School of Engineering, Osaka University, Suita, Osaka, Japan.
Toshiyuki OnoderaFaculty of Engineering, Tohoku Institute of Technology, Sendai, Miyagi, Japan.
Kanata KikkawaFaculty of Health Sciences, Tokyo Metropolitan University, Arakawa-ku, Tokyo, Japan.
Shimma HashimotoFaculty of Health Sciences, Tokyo Metropolitan University, Arakawa-ku, Tokyo, Japan.
Yuta HiraiGraduate School of Human Health Sciences, Tokyo Metropolitan University, Arakawa-ku, Tokyo, Japan.
Yusuke KobaInstitute for Radiological Science, National Institutes for Quantum Science and Technology, Chiba, Japan.
Ako HagaFaculty of Health Sciences, Tokyo Metropolitan University, Arakawa-ku, Tokyo, Japan.
Daiki MaruyamaGraduate School of Human Health Sciences, Tokyo Metropolitan University, Arakawa-ku, Tokyo, Japan.
Seong-Woo KimOrbray Co., Ltd., Adachi-ku, Tokyo, Japan.

Funding

joint research fund GG5-1170Orbray Co., LtdTohoku UniversityTokyo Metropolitan University
6 · The paper itself

Abstract

backgroundHeteroepitaxial diamond has recently gained attention as a radiation detector material due to its wide bandgap, radiation hardness, and near-tissue equivalence. Despite these advantages, its use as a solid-state ionization chamber for diagnostic X-ray dosimetry has not yet been established. Demonstrating stable, high-efficiency operation at low voltage would enable compact dosimeters with a very small sensitive volume, which is difficult to achieve with conventional air ionization chambers. PURPOSE: To perform the first characterization of a heteroepitaxial diamond ionization chamber (HED-IC) operated at low bias voltage under diagnostic X-ray conditions and to evaluate its feasibility as a compact, high-efficiency dosimeter.

methodsA heteroepitaxial diamond detector (4 × 4 × 0.5 mm

resultsThe HED-IC exhibited excellent dose linearity (R

conclusionsThe results demonstrate that the HED-IC can operate as a low-voltage, high-efficiency solid-state ionization chamber under diagnostic X-ray conditions. Owing to the scalability of heteroepitaxial diamond growth, this detector concept provides a promising basis for compact, tissue-equivalent dosimeters capable of real-time dose monitoring across a wide range of radiological applications.

Indexed as

DiamondElectricityRadiometryElectrodesMonte Carlo MethodX-RaysDiamonddiagnostic X‐ray dosimetryheteroepitaxial diamond detectorhigh‐sensitivity dosimetry

Identifiers

PMID41755805
PMCPMC12947052

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.