MRI using an off-resonant RF pulse to cause a phase shift or spoiling
By employing FREE and off-resonant RF pulses for B1 mapping and spoiling, the challenges of cost, size, and noise in MRI systems are addressed, achieving high-quality imaging in a compact and cost-effective manner.
WO2026043893A1 Publication Date: 2026-02-26ADIALANTE LLC
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Patent Information
- Application Number
- PCT/US2025/042593
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-08-19
- Filing Date
- 2025-08-19
- Publication Date
- 2026-02-26
AI Technical Summary
Technical Problem
Conventional MRI systems are costly, bulky, and require significant infrastructure, producing acoustic noise and limiting access, while reduced-cost portable systems often provide insufficient image quality due to lower magnetic field strength.
Method used
Utilize frequency-modulated Rabi-encoded echoes (FREE) and off-resonant RF pulses, such as Bloch-Siegert pulses, to map and spoil the transverse RF field (B1) without Bo gradient coils, enabling compact, silent, and cost-effective MRI systems.
Benefits of technology
Enables high-quality imaging without Bo gradient coils, reducing infrastructure needs and costs, and providing silent operation with improved image quality and clinical applicability.
✦ Generated by Eureka AI based on patent content.
Abstract
The present disclosure describes systems and methods of magnetic resonance imaging (MRI) that provide B1 field mapping and B1 field spoiling without a plurality of B0 gradient fields. An off-resonant pulse may be applied, or delivered, to the object of interest following an excitation pulse to induce a phase shift, which may be measured to determine the B1 field map. Also, a spoiling off-resonant RF pulse may be applied, or delivered, to the object of interest to remove unwanted signal coherence pathways in the region of the object.
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