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Systems and methods for concomitant field correction in magnetic resonance imaging with asymmetric gradients

An asymmetric, gradient technology used in asymmetric measurement of multiphase networks, measurement of magnetic variables, instruments, etc.

Inactive Publication Date: 2018-01-19
MAYO FOUND FOR MEDICAL EDUCATION & RES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Any adjustments to the existing gradient waveform will result in additional accompanying fields, which have not been considered before

Method used

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  • Systems and methods for concomitant field correction in magnetic resonance imaging with asymmetric gradients
  • Systems and methods for concomitant field correction in magnetic resonance imaging with asymmetric gradients
  • Systems and methods for concomitant field correction in magnetic resonance imaging with asymmetric gradients

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Embodiment Construction

[0019] Described herein are systems and methods for performing concomitant field correction in magnetic resonance imaging ("MRI") systems implementing asymmetric magnetic field gradients. In general, the systems and methods described herein can correct for the effects of multi-order concomitant fields, such as zero-order, first-order, and second-order concomitant fields.

[0020] The method described herein applies correction gradients in all x, y, and z directions simultaneously to compensate for first-order adjoint field effects. All first-order adjoint field terms can be compensated simultaneously, and the effect of additional correction gradients is also automatically accounted for by the methods described herein. The zeroth order adjoint field term can be compensated retrospectively by subtracting the cumulative phase from the data acquired using the compensation gradient. Similarly, second-order concomitant field effects can also be corrected during image reconstruction...

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Abstract

Systems and methods for performing concomitant field corrections in magnetic resonance imaging ('MRI') systems that implement asymmetric magnetic field gradients are provided, in general, the systemsand methods described here can correct for the effects of concomitant fields of multiple orders, such as zeroth order, first order, and second order concomitant fields.

Description

[0001] Cross-References to Associated Applications [0002] This application claims the title "SYSTEMS AND METHODS FOR CONCOMITANT FIELDCORRECTION IN MAGNETIC RESONANCE IMAGING WITH ASYMMETRIC GRADIENTS" filed on May 29, 2015 62 / 168,364 of U.S. Provisional Patent Application Serial No. 62 / 168,364 and filed on September 16, 2015, entitled "SYSTEMS AND METHODS FOR CONCOMITANTFIELD CORRECTION IN MAGNETIC RESONANCE IMAGING WITH ASYMMETRIC GRADIENTS)" and the entirety of these applications is hereby incorporated by reference. [0003] A Note About Federally Funded Research [0004] This invention was made with government support under EB010065 awarded by the National Institutes of Health. The government has certain rights in this invention. Background of the invention [0005] The field of the invention is systems and methods for magnetic resonance imaging ("MRI"). More specifically, the present invention relates to systems and methods for concomitant field correction and compe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R29/16
CPCG01R33/5616G01R33/563G01R33/56581G01R33/56554G01R33/56563
Inventor 陶晟臻J·D·奇萨思科Y·舒P·T·韦弗斯M·A·伯恩斯特因
Owner MAYO FOUND FOR MEDICAL EDUCATION & RES
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