Evidence map›Paper›PMID 41388506›Full record

ArticleMagnetic resonance in medicine2026

A Low-Cost and Compact High-Frequency Gallium Nitride Gradient Power Amplifier for Low-Field MRI.

N Reid Bolding, Jacob Hannan, Christopher Vaughn, Aria Patel, Snow Lin, Jessie E P Sun, William Grissom, Mark A Griswold

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Magnetic resonance in medicine, 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

8 authors.

N Reid BoldingDepartment of Physics, Case Western Reserve University, Cleveland, Ohio, USA.ORCID https://orcid.org/0000-0001-7082-3844
Jacob HannanDepartment of Physics, Case Western Reserve University, Cleveland, Ohio, USA.ORCID https://orcid.org/0009-0006-3256-3694
Christopher VaughnDepartment of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, USA.ORCID https://orcid.org/0000-0003-4288-4206
Aria PatelDepartment of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, USA.ORCID https://orcid.org/0009-0004-9727-9681
Snow LinDepartment of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, USA.ORCID https://orcid.org/0009-0009-2309-8729
Jessie E P SunDepartment of Radiology, University Hospitals of Cleveland, Cleveland, Ohio, USA.ORCID https://orcid.org/0000-0003-4659-9883
William GrissomDepartment of Radiology, University Hospitals of Cleveland, Cleveland, Ohio, USA.ORCID https://orcid.org/0000-0002-3289-1827
Mark A GriswoldDepartment of Physics, Case Western Reserve University, Cleveland, Ohio, USA.ORCID https://orcid.org/0000-0002-3011-6747

Funding

Gradient-Free Quantitative MRI using a Combination of B1-Selective Excitation and FingerprintingR01EB032709 · NIBIB · CASE WESTERN RESERVE UNIVERSITY · PI GRISSOM, WILLIAM A, GRISWOLD, MARK · 2022 to 2025
$2.6M
NIBIB NIH HHS R01EB032709
6 · The paper itself

Abstract

purposeTo reduce the upfront cost of small, low-field MRI systems, while expanding the capabilities of their gradient systems.

methodsA gradient power amplifier was designed to leverage the lowering cost of Gallium Nitride (GaN) power transistors and high speed logic, to achieve high efficiency and responsiveness for driving gradient coils. The switching H-bridge design was realized as a prototype and tested to determine power output capabilities. With a digital control system, the prototype was further tested using a load which simulates a small gradient, such as those used in head and extremity low-field MRI systems. Additionally in this test, the noise spectra produced in operation are analyzed.

resultsThe amplifier combined with an example control system to drive 15 A into a

conclusionUsing GaN transistors, a low-cost gradient amplifier can be implemented that will reduce the cost and size of low-field MRI systems, improving accessibility.

Indexed as

Amplifiers, ElectronicGalliumMagnetic Resonance ImagingEquipment DesignEquipment Failure AnalysisGalliumgallium nitrideaccessibilitygradient power amplifierhardwarelow‐field

Identifiers

PMID41388506
PMCPMC12962193

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.