公开(公告)号：US12174281B2

公开(公告)日：2024-12-24

申请号：US17947761

申请日：2022-09-19

Applicant: Regents of the University of Minnesota ,  Duke University

Inventor： Oren Solomon ,  Noam Harel ,  Guillermo Sapiro ,  Edward Auerbach ,  Steen Moeller ,  Remi Patriat ,  Henry Braun ,  Tara Palnitkar

IPC: G01R33/565 ,  A61B5/055 ,  G01R33/56

Abstract: A system and method are provided for creating magnetic resonance (MR) images with reduced motion artifacts from the MR data from which the images are produced. The method includes selecting a candidate image from a plurality of candidate images reconstructed from the MR data. The method also includes registering the candidate image to a reference image, comparing the candidate image to a consistency map, and, based on comparing the candidate image using the consistency map, selecting a blending algorithm. The method also includes generating a blended image using the blending algorithm and the candidate image and repeating these steps for each candidate image. The method also includes performing a Fourier aggregation to generate a combined image and displaying the combined image with reduced motion artifacts compared to the plurality of candidate images.

公开(公告)号：US20230136320A1

公开(公告)日：2023-05-04

申请号：US17947761

申请日：2022-09-19

Applicant: Regents of the University of Minnesota ,  Duke University

Inventor： Oren Solomon ,  Noam Harel ,  Guillermo Sapiro ,  Edward Auerbach ,  Steen Moeller ,  Remi Patriat ,  Henry Braun ,  Tara Palnitkar

IPC: G01R33/56 ,  A61B5/055

Abstract: A system and method are provided for creating magnetic resonance (MR) images with reduced motion artifacts from the MR data from which the images are produced. The method includes selecting a candidate image from a plurality of candidate images reconstructed from the MR data. The method also includes registering the candidate image to a reference image, comparing the candidate image to a consistency map, and, based on comparing the candidate image using the consistency map, selecting a blending algorithm. The method also includes generating a blended image using the blending algorithm and the candidate image and repeating these steps for each candidate image. The method also includes performing a Fourier aggregation to generate a combined image and displaying the combined image with reduced motion artifacts compared to the plurality of candidate images.

公开(公告)号：US20150362574A1

公开(公告)日：2015-12-17

申请号：US14762093

申请日：2014-01-24

Applicant: REGENTS OF THE UNIVERSITY OF MINNESOTA

Inventor： Xiaoping Wu ,  Pierre-Francois Van De Moortele ,  Sebastian Schmitter ,  Kamil Ugurbil ,  Edward Auerbach

IPC: G01R33/54 ,  A61B5/00 ,  A61B5/055 ,  G01R33/36 ,  G01R33/48

CPC classification number: G01R33/543 ,  A61B5/0042 ,  A61B5/055 ,  G01R33/246 ,  G01R33/36 ,  G01R33/3607 ,  G01R33/4818 ,  G01R33/4835

Abstract: A method for designing one or more multichannel, multiband radio frequency (“RF”) pulses for use with a magnetic resonance imaging (“MRI”) system is provided. The method includes determining a number of RF amplitude modulations and a number of RF phase modulations for each channel in a multichannel RF coil by minimizing an objective function that includes a complex-valued vector. The objective function also contains a system matrix that accounts for both a spatial sensitivity profile of each channel in the multichannel RF coil and a magnetic field map for each excitation band in the multiband RF pulse.

Abstract translation: 提供了一种用于设计用于磁共振成像（“MRI”）系统的一个或多个多通道，多频带（RF））脉冲的方法。 该方法包括通过使包括复值矢量的目标函数最小化来确定针对多通道RF线圈中的每个信道的RF幅度调制和多个RF相位调制。 目标函数还包含系统矩阵，其考虑了多通道RF线圈中每个通道的空间灵敏度曲线以及多频带RF脉冲中每个激励频带的磁场映射。

公开(公告)号：US09689948B2

公开(公告)日：2017-06-27

申请号：US14349195

申请日：2012-10-03

Applicant: REGENTS OF THE UNIVERSITY OF MINNESOTA

Inventor： Kamil Ugurbil ,  Edward Auerbach

IPC: G01R33/561 ,  A61B5/055 ,  G01R33/483

CPC classification number: G01R33/5615 ,  A61B5/055 ,  G01R33/4835

Abstract: A system and method for producing images depicting a plurality of slice locations in a subject using a magnetic resonance imaging (“MRI”} system is provided. In particular, the system and method utilize time-shifted multiband radio frequency (“RF”} pulses to lower peak voltage and peak power requirements when using conventional multiband RF pulses. A time-shifted multiband RF pulse includes at least two component RF pulses, which may be single-band or multiband pulses. The component RF pulses are designed such that they do not have temporal footprints that completely overlap; although, they may have temporal foot-prints that partially overlap or do not overlap at all. The MRI system is used to acquire magnetic resonance signals formed in response to a time-shifted multiband RF pulse and, from these acquired signals, images depicting each of the plurality of slice locations in the subject are reconstructed.

公开(公告)号：US20140253120A1

公开(公告)日：2014-09-11

申请号：US14349195

申请日：2012-10-03

Applicant: REGENTS OF THE UNIVERSITY OF MINNESOTA

Inventor： Kamil Ugurbil ,  Edward Auerbach

IPC: G01R33/561

CPC classification number: G01R33/5615 ,  A61B5/055 ,  G01R33/4835

Abstract: A system and method for producing images depicting a plurality of slice locations in a subject using a magnetic resonance imaging (“MRI”} system is provided. In particular, the system and method utilize time-shifted multiband radio frequency (“RF”} pulses to lower peak voltage and peak power requirements when using conventional multiband RF pulses. A time-shifted multiband RF pulse includes at least two component RF pulses, which may be single-band or multiband pulses. The component RF pulses are designed such that they do not have temporal footprints that completely overlap; although, they may have temporal foot-prints that partially overlap or do not overlap at all. The MRI system is used to acquire magnetic resonance signals formed in response to a time-shifted multiband RF pulse and, from these acquired signals, images depicting each of the plurality of slice locations in the subject are reconstructed.

Abstract translation: 提供了一种使用磁共振成像（“MRI”）系统产生描绘受试者中的多个切片位置的图像的系统和方法，特别地，该系统和方法利用时移多频带射频（“RF”）脉冲 在使用传统的多频带RF脉冲时，降低峰值电压和峰值功率需求，时移多频RF脉冲包括至少两个分量RF脉冲，其可以是单频带或多频带脉冲，分量RF脉冲被设计为使得它们 没有完全重叠的时间足迹;尽管它们可能具有部分重叠或完全不重叠的时间脚印，MRI系统用于采集响应于时移多频RF脉冲形成的磁共振信号， 从这些获取的信号中，重建描绘对象中的多个切片位置中的每一个的图像。