Keywords: New Devices, Hyperpolarized MR (Gas)
Motivation: In the Spin Exchange Optical Pump (SEOP) technique, the spare space between pump cell and gas manifold, called dead space, might impact polarization through dilution and dark rubidium depolarization.
Goal(s): This study aims to improve the design of the stop-flow polarizer to minimize dead gas and thus increase the polarization efficiency.
Approach: A magnetic-compatible actuator was designed for automatic control of cell stem valves opening/closing in our homemade polarizer, with good adaptability of main pumping field, Class I laser regulation and mechanical deviation.
Results: Results show that under the same temperature, the polarization levels with actuator were always better than the control group.
Impact: The application of actuator in stop-flow polarizer shows the feasibility of improving polarization through minimizing dead space. It can be quite useful when acquiring small amount of HP gas but with higher requirement on polarization.
How to access this content:
For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.
After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.
After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.
Keywords