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Design and evaluation of shielded gradient coils.
J W Carlson1, K A Derby, K C Hawryszko
1Radiologic Imaging Laboratory, University of California, San Francisco 94080.
Magnetic Resonance in Medicine
|August 1, 1992
Summary
This study presents efficient design techniques for shielded gradient coils in superconducting MRI systems. The methods ensure high homogeneity while considering coil size and residual eddy currents for whole-body applications.
Area of Science:
- Medical Imaging
- Electrical Engineering
- Applied Physics
Background:
- Superconducting Magnetic Resonance Imaging (MRI) systems rely on gradient coils for spatial encoding.
- Optimizing gradient coil design is crucial for achieving high image quality and diagnostic accuracy.
- Existing designs may face limitations in efficiency, size, or homogeneity.
Purpose of the Study:
- To describe novel techniques for designing efficient shielded gradient coils for superconducting MRI.
- To provide methods for constructing gradient coils that meet specific homogeneity requirements.
- To analyze design tradeoffs and residual eddy currents for whole-body MRI applications.
Main Methods:
- Development of design methodologies for shielded gradient coils.
- Calculation of residual eddy currents in coils with a finite number of wires.
- Analysis of efficiency, coil size, and gap size tradeoffs.
Main Results:
- The described techniques enable the construction of highly efficient gradient coils.
- The design methods successfully meet specified homogeneity requirements.
- Guidelines are provided for minimizing residual eddy currents in whole-body gradient coils.
Conclusions:
- The presented techniques offer a pathway to optimize shielded gradient coil design for superconducting MRI.
- Consideration of coil size, gap, and eddy currents is essential for efficient whole-body gradient coil construction.
- This work contributes to the advancement of MRI technology through improved gradient coil engineering.