Keywords: Gradients, Non-Array RF Coils, Antennas & Waveguides, eddy current; shielded‐coaxial‐cable coils; gradient correction; MRI
Motivation: Rapid changes in gradient magnetic fields induce eddy currents, posing a considerable challenge to the accuracy and stability of MRI systems.
Goal(s): Accurate measurement of eddy currents is crucial for the rapid and efficient design of eddy current compensation parameters.
Approach: The gradient eddy current measuring device utilizes coaxial cables to construct coil units and compares the channels crosstalk with traditional copper coils.
Results: The device leverages the shielding effect of coaxial cables to reduce mutual interference between coils. With a a power crosstalk ratio above 30dB between any two units, the channel isolation is higher than that of traditional copper coils.
Impact: By precisely quantifying the magnitude and distribution of eddy currents, MRI system engineers and researchers can develop effective correction algorithms that mitigate their impact on image quality. A dedicated eddy current measurement device necessitates a high-isolation to acquire MR signals.
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