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Highly constrained backprojection reconstruction in diffusion weighted mri

A technology of diffusion weighted image and rear projection, which is applied in the direction of measuring magnetic variables, measuring devices, instruments, etc., and can solve the problems of long total scanning time, extension, etc.

Inactive Publication Date: 2008-10-08
WISCONSIN ALUMNI RES FOUND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Of course, it is also desirable to acquire more than six directions, but acquiring additional DWI images increases the already long total scan time

Method used

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  • Highly constrained backprojection reconstruction in diffusion weighted mri
  • Highly constrained backprojection reconstruction in diffusion weighted mri
  • Highly constrained backprojection reconstruction in diffusion weighted mri

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Embodiment Construction

[0040] With particular reference to Figure 1, a preferred embodiment of the present invention is used in an MRI system. The MRI system includes a workstation 110 having a display 112 and a keyboard 114 . Workstation 110 includes processor 116, which is a commercial programmable machine that can run a commercial operating system. Workstation 110 provides an operator interface capable of scanning indications to be input into the MRI system.

[0041] Workstation 110 is coupled to four servers: pulse sequence server 118 ; data acquisition server 120 ; data processing server 122 ; and data storage server 23 . In a preferred embodiment, data storage server 23 is implemented by workstation processor 116 and associated disk drive interface circuitry. The remaining three servers 118, 120 and 122 are implemented by different processors housed in a single chassis and interconnected by a 64-bit backplane bus. The pulse train server 118 employs a commercial microprocessor and a commerci...

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Abstract

Highly undersampled diffusion weighted image data sets are acquired for a plurality of different directions using a projection reconstruction pulse sequence. The acquired projection views are interleaved and are combined to form a more highly sampled data set that is used to reconstruct a composite image. A DWI image is reconstructed from each undersampled data set for each direction using a highly constrained backprojected method that employs the composite image. Diffusion tensor values are calculated from the DWI images.

Description

[0001] Cross References to Applications [0002] This application is based on two U.S. Provisional Patent Applications: 60 / 719,445, filed September 22, 2005, entitled "HIGHLY CONSTRAINED IMAGE RECONSTRUCTION METHOD"; CONSTRAINED IMAGE RECONSTRUCTION METHOD" application 60 / 774,314. [0003] Statement Regarding Federally Funded Research [0004] This invention was supported by government grants from National Institutes of Health Fund Projects HL06488, HL072260 and MH062015. The United States Government has certain rights in this invention. Background of the invention [0005] The field of the invention is magnetic resonance imaging (MRI), in particular methods for acquiring and reconstructing diffusion-weighted images. [0006] Magnetic resonance imaging uses the phenomenon of nuclear magnetic resonance (NMR) to produce images. When a substance such as human tissue is subjected to a uniform magnetic field (polarization field B 0 ), the magnetic moments of the individual spi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/563
Inventor C・A・米斯特塔A・L・亚历山大
Owner WISCONSIN ALUMNI RES FOUND
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