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Hyperpolarized Xenon for NMR and MRI Applications
Published on: September 6, 2012
Dynamic nuclear polarization polarizer for sterile use intent.
Jan H Ardenkjaer-Larsen1, Andrew M Leach, Neil Clarke
1GE Healthcare, Brøndby, Denmark. jan.henrik.ardenkjaer-larsen@ge.com
NMR in Biomedicine
|March 19, 2011
Summary
A new dissolution-dynamic nuclear polarization (DNP) polarizer designed for sterile clinical use enables multi-sample polarization. This innovative system achieves high polarization levels with enhanced efficiency and reduced cryogen consumption.
Area of Science:
- Medical Imaging
- Biophysics
- Chemical Engineering
Background:
- Dynamic nuclear polarization (DNP) enhances nuclear magnetic resonance (NMR) signal sensitivity.
- Existing DNP polarizers often lack sterile design and clinical compatibility.
- Need for efficient, high-throughput DNP systems for medical applications.
Purpose of the Study:
- To design, build, and test a novel polarizer for sterile, clinical use.
- To improve throughput and efficiency in DNP-based hyperpolarization.
- To achieve high polarization levels for medical imaging agents.
Main Methods:
- Development of a novel polarizer utilizing dissolution-dynamic nuclear polarization (DNP).
- Integration of a sterile, disposable fluid path and a closed-cycle cryogenic system.
- Multi-sample polarization capability and an inline filter for agent removal.
Main Results:
- Achieved solid-state polarization of 36 ± 4% for [1-(13)C]pyruvic acid with 10 mW microwave power.
- Measured liquid-state polarization of 18 ± 2%.
- Demonstrated efficient cryogenic system operation with rapid regeneration and low heat loads.
Conclusions:
- The novel DNP polarizer is designed for sterile, clinical applications.
- The system offers high throughput, efficiency, and reduced cryogen usage.
- The achieved polarization levels are promising for hyperpolarized MRI agent development.
