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A MRI method of faster channel-by-channel reconstruction without image degradation

A channel and image representation technology, which is applied in the directions of using nuclear magnetic resonance image system for measurement, using magnetic variable measurement, measuring magnetic variable, etc., can solve problems such as lack of, optimize phase definition, and reconstruction hazards, so as to reduce image degradation and reduce The effect of reconstruction time

Inactive Publication Date: 2013-12-04
KONINKLJIJKE PHILIPS NV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these techniques, DVC and ST, suffer from a lack of techniques to efficiently optimize the phase definition to produce the best calibrated signal
Without an accurate calibration signal, the final reconstruction can be significantly compromised or even destroyed

Method used

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  • A MRI method of faster channel-by-channel reconstruction without image degradation
  • A MRI method of faster channel-by-channel reconstruction without image degradation
  • A MRI method of faster channel-by-channel reconstruction without image degradation

Examples

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Embodiment Construction

[0018] refer to figure 1 , the magnetic resonance imaging system 10 includes a main magnet 12 that generates a temporally uniform B across an examination region 14 0 field. The main magnet can be a ring or hole type magnet, a C-shaped open magnet, open magnets of other designs, and the like. A gradient magnetic field coil 16 positioned adjacent to the main magnet is used along the 0 The axis selected by the magnetic field generates a magnetic field gradient.

[0019] A radio frequency (RF) coil array, such as an integral radio frequency coil, is positioned adjacent to the examination region. The RF coil array includes a plurality of individual RF coil elements 18, or may be a birdcage type coil having a plurality of elements 18 interconnected by an end-ring RF coil structure. An array of RF coils generates radio frequency pulses for exciting magnetic resonance in aligned dipoles of a subject. In some embodiments, radio frequency coil assembly 18 is also used to detect mag...

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Abstract

A plurality of coil elements (18, 18') and corresponding receivers (26) define a plurality of channels, each carrying a corresponding partial k-space data set (60, 64). One or more processors (30) generate (80) a first image representation (76) based on the plurality of partial k-space data sets, generate a relative sensitivity map (82) for each of the channels, project (90) the first image representation (76) with each of the relative sensitivity maps (82) to generate a plurality of recreated k-space data sets (92), and each partial k-space data and the corresponding recreated k-space data set are combined to generate substituted k-space data sets (96). The substituted k-space data sets are reconstructed (100) into a plurality of images (102) which are combined (104) to create a final image (106).

Description

technical field [0001] This application relates to magnetic resonance technology. It has particular application in channel-by-channel reconstruction algorithms employed in parallel imaging methods. Background technique [0002] The introduction of multi-coil arrays in magnetic resonance (MR) systems to improve the signal-to-noise ratio (SNR) on volume coils and large surface coils has led to the introduction of multiple channel receivers included in the system. More recently, the success of partially parallel imaging (PPI) technology is driving the industry to develop MRI systems with a larger number of receiver channels to enable parallel imaging with higher acceleration factors and wider coverage. These techniques use spatial information contained in the array's component coils to partially replace spatial encoding, greatly reducing imaging time, and typically use gradients to perform spatial encoding. [0003] Commercial MRI systems with 32 or more receiver channels are...

Claims

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Application Information

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IPC IPC(8): G01R33/561G01R33/565
CPCG01R33/5612G01R33/5611G01R33/56509G01R33/34G01R33/56
Inventor F·黄W·林
Owner KONINKLJIJKE PHILIPS NV
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