ArticleThe Review of scientific instruments2025
Compact 1 GHz electron paramagnetic resonance spectrometer and imager.
Article in The Review of scientific instruments, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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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.
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.
Who cites it
1 citing paper in PubMed.
- Comparison of 10 mm and 30 mm Diameter Surface Coil Resonators for 1 GHz EPR.Applied magnetic resonance · 2025Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors.
Funding
Abstract
A 1 GHz preclinical electron paramagnetic resonance spectrometer and imager has been developed to study low concentrations of radicals using rapid-scan detection. The design focuses on minimizing the losses between the resonator and the first-stage low-noise amplifier. The adjustable-frequency source with the lowest available noise was selected and the output was amplified to provide sufficient power for experiments with relatively rapidly relaxing nitroxide radicals. For resonators with similar geometries and efficiencies, improved signal to noise was demonstrated relative to our previous instrument that operates at 700 MHz, consistent with predictions for frequency dependence. System performance was demonstrated for solutions of nitroxide radicals in resonators that contain 8 mm or 25 mm diameter cylindrical tubes. For 15N-d16 tempone in aqueous solution and a signal averaging time of 3.8 s, a signal-to-noise of 3 required 2 × 1014 spins in the 8 mm resonator or 4.5 × 1015 spins in the 25 mm resonator. 3D spatial imaging was demonstrated with a phantom consisting of three tubes containing solutions of a nitroxide radical.
Identifiers
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Registered trials
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.