RF shield for MRI comprising conductive coating as shielding material
US-9417301-B2 · Aug 16, 2016 · US
System and method for prospective correction of high order eddy-current-induced distortion in diffusion-weighted echo planar imaging
US8942945B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8942945-B2 |
| Application number | US-201213364003-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 1, 2012 |
| Priority date | Apr 19, 2011 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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A computer is programmed to acquire calibration data from a calibration scan, the calibration data configured to characterize high order eddy current (HOEC) generated magnetic field error of an imaging system. The computer is also programmed to process the calibration data to generate a plurality of basis coefficients and a plurality of time constants and to calculate a plurality of basis correction coefficients based on the plurality of basis coefficients, the plurality of time constants, and gradient waveforms in a given pulse sequence. The computer is further programmed to execute a diffusion-weighted imaging scan that comprises application of a DW-EPI pulse sequence to acquire MR data from an imaging subject and reconstruction of an image based on the acquired MR data. The computer is also programmed to apply HOEC-generated magnetic field error correction during application of the DW-EPI pulse sequence configured to reduce HOEC-induced distortion in the reconstructed image.
First claim
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What is claimed is: 1. An MRI apparatus comprising: a magnetic resonance imaging (MRI) system having a plurality of gradient coils positioned about a bore of a magnet, and an RF transceiver system and an RF switch controlled by a pulse module to transmit RF signals to an RF coil assembly to acquire MR images; and a computer programmed to: acquire calibration data from a calibration scan, the calibration data configured to characterize high order eddy current generated magnetic…
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Physics · mapped topic
Physics · mapped topic
- G01R33/56518Primary
Physics · mapped topic
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Frequently asked questions
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- What does patent US8942945B2 cover?
- A computer is programmed to acquire calibration data from a calibration scan, the calibration data configured to characterize high order eddy current (HOEC) generated magnetic field error of an imaging system. The computer is also programmed to process the calibration data to generate a plurality of basis coefficients and a plurality of time constants and to calculate a plurality of basis corre…
- Who is the assignee on this patent?
- Xu Dan, Maier Joseph K, King Kevin F, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification G01R33/56518. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).