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Measuring the Spin-Lattice Relaxation Magnetic Field Dependence of Hyperpolarized [1-13C]pyruvate
Published on: September 13, 2019
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Hyperpolarized nanodiamond with long spin-relaxation times
Ewa Rej1, Torsten Gaebel1, Thomas Boele1
1ARC Centre of Excellence for Engineered Quantum Systems, School of Physics, University of Sydney, Sydney, New South Wales 2006, Australia.
Nature Communications
|October 10, 2015
Summary
Synthetic nanodiamonds can be hyperpolarized for magnetic resonance imaging, offering a 10,000-fold signal boost. This breakthrough overcomes short relaxation times, enabling longer imaging windows for advanced theranostics.
Area of Science:
- Magnetic Resonance Imaging
- Nanotechnology
- Biomedical Engineering
Background:
- Hyperpolarized agents like (13)C-labelled compounds significantly enhance magnetic resonance signal by 10,000-fold.
- Short spin-relaxation times (<60s for (13)C liquids) limit the duration of the hyperpolarized signal, posing a challenge for advanced applications.
Purpose of the Study:
- To demonstrate hyperpolarization of natural abundance (13)C spins in synthetic nanodiamonds.
- To overcome the limitation of short spin-relaxation times in hyperpolarized magnetic resonance.
- To explore the theranostic potential of nanodiamonds in magnetic resonance imaging.
Main Methods:
- Hyperpolarization of 1.1% natural abundance (13)C spins in synthetic nanodiamonds.
- Experiments conducted at both cryogenic and room temperatures.
- Characterization of spin-relaxation times in the solid-state environment of nanodiamonds.
Main Results:
- Successful hyperpolarization of (13)C spins in nanodiamonds without free radicals.
- Achieved exceptionally long spin-relaxation times exceeding 1 hour, significantly longer than liquid-state compounds.
- Demonstrated the feasibility of hyperpolarization at both cryogenic and room temperatures.
Conclusions:
- Synthetic nanodiamonds can be effectively hyperpolarized, offering a robust platform for advanced magnetic resonance applications.
- The extended relaxation times of hyperpolarized nanodiamonds overcome a key limitation in current hyperpolarization techniques.
- This research expands the theranostic applications of nanodiamonds, integrating hyperpolarized magnetic resonance capabilities with existing life science uses.
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