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System used for reconstructing and parallelly obtaining mri image

An imaging system and image technology, applied in the fields of application, medical science, diagnosis, etc., can solve the problem of reducing the quality of the image and so on

Active Publication Date: 2013-04-10
SIEMENS HEALTHCARE GMBH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Known systems for generating images from parallel MR images acquired by multiple RF coils provide images of reduced quality and are relatively slow

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  • System used for reconstructing and parallelly obtaining mri image
  • System used for reconstructing and parallelly obtaining mri image
  • System used for reconstructing and parallelly obtaining mri image

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Embodiment Construction

[0011] A system accelerates magnetic resonance (MR) imaging using compressed sensing (CS) combined with GRAPPA, a parallel imaging method, to reconstruct images from highly undersampled data, compared to reconstruction using GRAPPA alone It has a significantly improved error (RMSE). This combination of GRAPPA and CS uses CS to find a better GRAPPA kernel by using a simultaneous sparsity penalty function of the coil image. The method is implemented by formulating the problem as a joint optimization of least squares fitting of a kernel to an ACS line and the sparsity of images generated using GRAPPA with this kernel. The system reconstructs quality images from highly undersampled parallel acquisition with multiple coils. The system includes a computing device (e.g., computer, laptop, DSP (digital signal processor), graphics tablet, portable radiotelephone) that receives acquired data from each RF coil of the MR imaging system, and integrates (integrate) the data to produce a r...

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Abstract

The present invention relates to a system used for reconstructing and parallelly obtaining an MRI image, comprising a plurality of MR imaging RF coils for independently receiving MR imaging data of anatomy sections of a patient, wherein the MR imaging system obtains a plurality of image data sets corresponding to sections through using the plurality of RF coils. An image data processor comprises at least one processing device adjusted to execute following steps of: obtaining a first weight set used for generating a calibration data set, wherein the calibration data set comprises a k-space data subset representing the composite image data of a plurality of image data sets, and at least one processing device uses the calibration data set in the process of generating a first MR image data set; and obtaining a second weight set through using the calibration data set and the generated first MR image data set, wherein the second weight set is used in the process of generating a second MR image data set, and the second MR image data set represents a single image.

Description

[0001] This is a non-provisional application Serial No. 61 / 543,909 filed October 6, 2011 by D. Weller et al. technical field [0002] The present invention relates to a system for parallel image processing in MR imaging by using a second set of weights in generating a second set of MR image data representing A single image of a reduced set of data components for a first set of synthetic MR image data obtained using the first set of weights and the generated set of calibration data comprising a subset of k-space data. Background technique [0003] Known systems for generating images from parallel MR images acquired by multiple RF coils provide images of reduced quality and are relatively slow. A system in accordance with inventive principles addresses this deficiency and related problems. Contents of the invention [0004] A system accelerates magnetic resonance (MR) imaging using compressed sensing (CS) combined with GRAPPA (Global Autocalibration Partially Parallel Acqui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/055
Inventor D·维勒L·格拉迪L·沃尔德V·K·戈亚尔
Owner SIEMENS HEALTHCARE GMBH
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