Birdcage coil for ultra-high field magnetic resonance imaging and its homogeneity evaluation structure
By employing a hybrid distributed capacitance birdcage coil design in ultra-high field magnetic resonance imaging, combining the distributed capacitance on the legs and the lumped capacitor on the end ring, the problem of low signal-to-noise ratio was solved, achieving a higher signal-to-noise ratio and Q value, reducing the SAR value, and improving imaging quality and radio frequency security.
CN120490930BActive Publication Date: 2026-01-30BEIJING SPIKE TECH DEV CO LTD
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Patent Information
- Application Number
- CN202510828246.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-19
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2045-06-19
AI Technical Summary
Technical Problem
In high-field magnetic resonance imaging, traditional birdcage coils have low signal-to-noise ratios, and lumped capacitors lead to reduced quality factors and magnetic susceptibility artifacts, affecting image quality.
Method used
A hybrid distributed capacitance birdcage coil design is adopted, which combines the distributed capacitance on the legs and the lumped capacitor on the end ring to form a hybrid distributed capacitance birdcage coil, optimizing field uniformity and signal-to-noise ratio.
Benefits of technology
It improves the signal-to-noise ratio and Q value of the coil, reduces the SAR value, enhances imaging quality and radio frequency security, and is suitable for imaging small animals in extremely high fields.
✦ Generated by Eureka AI based on patent content.
Abstract
This application discloses a birdcage coil for extremely high field magnetic resonance imaging and its uniformity evaluation structure, relating to the field of magnetic resonance imaging. The coil includes: two circular end rings, multiple parallel legs, and a PCB board. The two circular end rings are arranged opposite each other, and the multiple parallel legs are connected between the first and second circular end rings, thus forming a cylindrical birdcage structure. The PCB board is arranged along the birdcage structure. On the inner side of the PCB board, at the position of each parallel leg, a long strip of inner copper plating is provided along the extension direction of the leg. On the outer side of the PCB board, at both ends of each inner copper plating, a predetermined shape of outer copper plating is provided. Each pair of outer copper platings is not connected, and there is an overlap between the outer and inner copper platings, forming a distributed capacitance. A lumped capacitor is provided between each pair of adjacent outer copper platings, near the edge of the end ring. This application improves the signal-to-noise ratio of the birdcage coil.
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