Low noise gradient amplification components for MR systems
US11415651B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 9, 2020 |
| Grant date | Aug 16, 2022 |
| Priority date | — |
| Expiry date | Jan 18, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/445
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Described herein are power components that may facilitate efficient, low noise operation of low-field MRI systems. In some embodiments, the power components may include switching power converters configured to switch in a manner that reduces or eliminates noise within a desired frequency band (e.g., the Larmor frequency band) due to harmonics of the switching frequency. For example, the desired frequency band may be positioned between adjacent integer harmonics of the switching frequency. In some embodiments, harmonic components generated by multiple switching power converters may destructively interfere with one another, reducing or eliminating the amplitude of the harmonic components of the switching frequency that reside in the desired frequency band. In some embodiments, the power components may include switching power converters configured in parallel without the need for active current balancing circuitry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.