ArticleMagnetic resonance in medicine2021
Development of an L-band resonator optimized for fast scan EPR imaging of the mouse head.
Article in Magnetic resonance in medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 8 citations in OpenAlex.
- Electron Spin Resonance Probe Incorporation into Bioinks Permits Longitudinal Oxygen Imaging of Bioprinted Constructs.Molecular imaging and biology · 2024Article
- Rapid scan EPR: Automated digital resonator control for low-latency data acquisition.Journal of magnetic resonance (San Diego, Calif. : 1997) · 2022Article
- High fidelity triangular sweep of the magnetic field for millisecond scan EPR imaging.Journal of magnetic resonance (San Diego, Calif. : 1997) · 2021Article
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5 authors at 1 institution in 1 country.
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Abstract
purposeTo develop a novel resonator for high-quality fast scan electron paramagnetic resonance (EPR) and EPR/NMR co-imaging of the head and brain of mice at 1.25 GHz.
methodsResonator dimensions were scaled to fit the mouse head with maximum filling factor. A single-loop 6-gap resonator of 20 mm diameter and 20 mm length was constructed. High resonator stability was achieved utilizing a fixed position double coupling loop. Symmetrical mutually inverted connections rendered it insensitive to field modulation and fast scan. Coupling adjustment was provided by a parallel-connected variable capacitor located at the feeding line at λ/4 distance. To minimize radiation loss, the shield around the resonator was supplemented with a planar conductive disc that focuses return magnetic flux.
resultsCoupling of the resonator loaded with the mouse head was efficient and easy. This resonator enabled high-quality in vivo 3D EPR imaging of the mouse head following intravenous infusion of nitroxide probes. With this resonator and rapid scan EPR system, 4 ms scans were acquired in forward and reverse directions so that images with 2-scan 3,136 projections were acquired in 25 s. Head images were achieved with resolutions of 0.4 mm, enabling visualization of probe localization and uptake across the blood-brain barrier.
conclusionsThis resonator design provides good sensitivity, high stability, and B
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