Journal
MOLECULES
Volume 26, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/molecules26010133
Keywords
hyperpolarization; magnetic resonance imaging; flip angle
Funding
- NSF [1903803]
- NIH [1S10RR013871-01A1]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1903803] Funding Source: National Science Foundation
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This paper presents a theoretical framework to address the challenges of hyperpolarized solids imaging, and demonstrates hyperpolarized diamonds imaging as a prototypical platform to test the theory. The study also analyzes gradient arrangement for fast imaging to overcome intrinsic short decoherence in solids.
Hyperpolarization is one of the approaches to enhance Nuclear Magnetic Resonance (NMR) and Magnetic Resonance Imaging (MRI) signal by increasing the population difference between the nuclear spin states. Imaging hyperpolarized solids opens up extensive possibilities, yet is challenging to perform. The highly populated state is normally not replenishable to the initial polarization level by spin-lattice relaxation, which regular MRI sequences rely on. This makes it necessary to carefully budget the polarization to optimize the image quality. In this paper, we present a theoretical framework to address such challenge under the assumption of either variable flip angles or a constant flip angle. In addition, we analyze the gradient arrangement to perform fast imaging to overcome intrinsic short decoherence in solids. Hyperpolarized diamonds imaging is demonstrated as a prototypical platform to test the theory.
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