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Speed ​​Magnetic Resonance Imaging Method Based on K-Space Center Ghost Location

A magnetic resonance imaging and k-space technology, applied in magnetic resonance measurement, material analysis through resonance, magnetic property measurement, etc., can solve the problem of failure to find authorized invention patents or applications, shorten reconstruction time, and be easy to integrate , Improve the effect of data collection time

Active Publication Date: 2018-08-10
洛阳康达卡乐福医疗科技有限公司
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Problems solved by technology

At present, there is no authorized invention patent or application for any SPEED fast imaging method based on k-space center ghost positioning

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  • Speed ​​Magnetic Resonance Imaging Method Based on K-Space Center Ghost Location

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with accompanying drawing.

[0043] The present invention mainly includes nine steps: k-space data acquisition, zero-filled Fourier reconstruction, differential transformation, establishment of low-resolution overlapping ghost image, establishment of ghost order, double-layer ghost model solution, ghost separation, multiple Registrar summation, inverse filter reconstruction of ghost maps.

[0044] Step 1: k-space data acquisition

[0045] In the phase encoding direction of k-space (i.e., PE direction), one row of data is collected every N rows, and two groups are collected in total, respectively with S 1 and S 2 express. use d 1 , d 2 Indicates the offset of each group of undersampled data in the PE direction, and the sampling method is N(d 1 , d 2 ) means, if figure 1 shown.

[0046] According to the size of the image, 16 to 64 rows of data are collected in the central area of ​​k-space in th...

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Abstract

The invention discloses an SPEED (Skipped Phase Encoding and Edge Deghosting) magnetic resonance imaging method based on k space center ghost positioning. The SPEED magnetic resonance imaging method based on k space center ghost positioning mainly includes 9 steps: k space data acquisition, zero fill Fourier reconstruction, difference transformation, establishment of a low resolution overlapped ghost graph, determination of ghost order, solution for a double-layer ghost model, separation of ghost, registration and summation of a plurality of ghost mapping graphs, and inverse filtering reconstruction. The SPEED magnetic resonance imaging method based on k space center ghost positioning can apply the partial data of the k space center to positioning of ghost order for SPEED imaging and avoids the step of using the least-square error to solve the ghost order so as to reduce the required sampled three groups of k space undersampled data to two groups and further reduces the data acquisition time of the SPEED imaging method.

Description

technical field [0001] The invention belongs to the field of magnetic resonance imaging, and relates to a SPEED magnetic resonance imaging method based on k-space center ghost positioning. Background technique [0002] Magnetic resonance imaging (Magnetic Resonance Imaging, MRI) has no adverse effects on the body, and has excellent soft tissue resolution ability, and has been widely used in clinical disease detection. However, the clinical application of MRI is often limited by the long data acquisition time. Researchers have improved the speed of MRI data acquisition by improving the performance of MRI hardware, adopting efficient k-space (frequency space) data acquisition trajectory, developing fast sequence and parallel data acquisition, etc., but in clinical practice, the existing research results It still cannot fully meet the demand for fast imaging, such as in applications such as brain functional imaging and cardiac dynamic imaging. [0003] MRI data acquisition is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/20A61B5/055
CPCA61B5/055G01R33/20
Inventor 金朝阳向清三
Owner 洛阳康达卡乐福医疗科技有限公司
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