PatentsDB

Restriction of the imaging region for MRI in an inhomogeneous magnetic field

US9488709B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-9488709-B2
Application numberUS-201214004823-A
CountryUS
Kind codeB2
Filing dateFeb 14, 2012
Priority dateMar 17, 2011
Publication dateNov 8, 2016
Grant dateNov 8, 2016

How to read this patent

A practical reading order for non-experts. Skip the full description unless you need deep technical detail.

  1. Title

    What the patent document calls the invention.

  2. Abstract

    A short plain-language summary of the technical disclosure.

  3. Assignees and inventors

    Who owns or filed the patent and who is credited as inventor.

  4. Key dates

    Filing, priority, publication, and grant dates set the timeline.

  5. First independent claim

    The legal scope of protection — read this for what is actually claimed.

  6. CPC / IPC classifications

    Technology tags used to group this patent with similar filings.

  7. Citations and related patents

    Prior art links and similar publications in this corpus.

Abstract

Official abstract text for this publication.

When magnetic resonance imaging in the vicinity of a metallic object (like, for instance, a metal implant), severe spatial perturbations of the static magnetic field occur. In order to suppress the back-folding of distant off-resonant signals into the region of interest, the imaging volume is spatially restricted by selection gradients applied concurrently with the excitation and the refocusing RF pulses in a spin echo sequence. The selection gradient applied during the excitation pulse has an amplitude and/or a polarity different from that of the selection gradient applied during the refocusing pulse so that the respectively selected slices in an off-resonance frequency versus spatial coordinate diagram become tilted with respect to one another. The applied imaging technique may of the SEMAC or MAVRIC type and may incorporate compressed sensing, parallel imaging, fat suppression and/or SVD-based noise reduction.

First claim

Opening claim text (preview).

The invention claimed is: 1. A magnetic resonance imaging system for acquiring magnetic resonance data from an imaging zone of a subject, the magnetic resonance imaging system comprising: a memory configured to store machine executable instructions for execution by a processor, the execution of the instructions causes the processor to: generate magnetic resonance control commands using one of a MAVRIC and a SEMAC imaging pulse sequence, wherein the pulse sequence selectively enco…

Assignees

Inventors

Classifications

Patent family

Related publications grouped by family.

View patent family 44041451

External sources

Next steps

Free tools are coming soon. Tell us what you want to track and we'll notify you.

Get alerts for this patentView on Google Patents

Request deeper analysis

Frequently asked questions

Answers are generated from the same data shown on this page.

What does patent US9488709B2 cover?
When magnetic resonance imaging in the vicinity of a metallic object (like, for instance, a metal implant), severe spatial perturbations of the static magnetic field occur. In order to suppress the back-folding of distant off-resonant signals into the region of interest, the imaging volume is spatially restricted by selection gradients applied concurrently with the excitation and the refocusing…
Who is the assignee on this patent?
Den Harder Johan Michiel, Bos Clemens, Blume Ulrike Andrea, and 1 more
What technology area does this patent fall under?
Primary CPC classification G01R33/543. Mapped technology areas include Physics.
When was this patent published?
Publication date Tue Nov 08 2016 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).