A high-temperature superconducting Helmholtz probe for microscopy at 9.4 T

Area of Science:

• Physics
• Engineering
• Materials Science

Background:

• Magnetic Resonance Microscopy (MRM) requires high sensitivity for detailed imaging.
• Conventional probes face limitations in signal-to-noise ratio (SNR) at higher frequencies.
• Advancements in superconducting materials offer potential for improved MRM performance.

Purpose of the Study:

• To design and evaluate a high-temperature superconducting (HTS) probe for 400 MHz MRM.
• To assess the suitability of cryo-cooled coils for MRM applications.
• To demonstrate the SNR advantages of HTS probes over conventional designs.

Main Methods:

• Development of an HTS probe featuring a Helmholtz coil configuration.
• Implementation of a stable open-cycle cooling mechanism for the probe.
• Characterization of coil parameters, including B1 field homogeneity and thermal stability.
• Comparative analysis of SNR performance against a copper Helmholtz coil pair.

Main Results:

• The HTS probe demonstrated superior signal-to-noise (SNR) performance compared to a copper Helmholtz pair.
• Characterization confirmed the suitability of cryo-cooled coils for MRM operation.
• Analysis of B1 field homogeneity and thermal stability validated the probe's design.
• MRM images showcased the significant SNR advantage offered by the HTS probe.

Conclusions:

• The developed HTS probe is effective for high-frequency MRM (400 MHz).
• Cryo-cooled superconducting coils provide a substantial SNR improvement for MRM.
• This technology enables enhanced imaging capabilities for various MRM applications.