公开(公告)号：US10088539B2

公开(公告)日：2018-10-02

申请号：US15142957

申请日：2016-04-29

Applicant: General Electric Company

Inventor： Florian Wiesinger ,  Anne Menini ,  Ana Beatriz Solana Sanchez

IPC: G01R33/385 ,  G01R33/48 ,  G01R33/561

Abstract: Methods and systems for production of silent, multi-gradient-echo, magnetic resonance images are provided. The methods employ iterative application of small updates to the magnetic field gradient followed by a short, non-selective radiofrequency pulse excitation and for free induction decay data acquisition. The magnetic field gradient updates allow for silent, self-refocusing pulse sequence. Subsequent applications of the magnetic field gradients allow for multiple echo data acquisitions, which may allow fast, silent production of T2*-weighted images.

公开(公告)号：US09474495B2

公开(公告)日：2016-10-25

申请号：US14579039

申请日：2014-12-22

Applicant: General Electric Company

Inventor： Sangtae Ahn ,  Ravindra Mohan Manjeshwar ,  Florian Wiesinger ,  Dattesh Dayanand Shanbhag ,  Sandeep Suryanarayana Kaushik ,  Hua Qian ,  Anne Menini

IPC: A61B6/00 ,  G06T7/00 ,  G01R33/56 ,  G01T1/24 ,  G06T11/00 ,  A61B6/03 ,  A61B5/055 ,  A61B5/00 ,  A61B5/053 ,  A61B8/00

CPC classification number: A61B6/4417 ,  A61B5/0059 ,  A61B5/0536 ,  A61B5/055 ,  A61B6/032 ,  A61B6/037 ,  A61B6/5205 ,  A61B6/5258 ,  A61B8/4416 ,  G01R33/481 ,  G01R33/56 ,  G01T1/1603 ,  G01T1/1647 ,  G01T1/249 ,  G06T7/0012 ,  G06T11/003 ,  G06T11/006 ,  G06T2200/04 ,  G06T2207/10081 ,  G06T2207/10088 ,  G06T2207/10104 ,  G06T2207/30024 ,  G06T2207/30061 ,  G06T2211/40 ,  G06T2211/424

Abstract: Imaging system and method are presented. Emission scan (ES) and anatomical scan (AS) data corresponding to a target volume in a subject are received. One or more at least partial AS images are reconstructed using AS data. An image-space certainty (IC) map representing a confidence level (CL) for attenuation coefficients of selected voxels in AS images and a preliminary attenuation (PA) map based on AS images are generated. One or more of selected attenuation factors (AF) in projection-space are initialized based on PA map. A projection-space certainty (PC) map representing CL for the selected AF is generated based on IC map. An emission image of the target volume is initialized. The selected AF and emission image are iteratively updated based on the ES data, PC map, initial AF, and/or initial emission image. A desired emission image and/or AF values are determined based on the iteratively updated AF and/or emission image.

Abstract translation: 介绍了成像系统和方法。 接收与对象中的目标体积对应的发射扫描（ES）和解剖扫描（AS）数据。 使用AS数据重构一个或多个至少部分AS图像。 生成表示AS图像中的选定体素的衰减系数的置信水平（CL）和基于AS图像的初步衰减（PA）图的图像空间确定性（IC）图。 基于PA映射初始化投影空间中的一个或多个选择的衰减因子（AF）。 基于IC映射生成表示所选AF的CL的投影空间确定性（PC）映射。 初始化目标体积的发射图像。 基于ES数据，PC映射，初始AF和/或初始发射图像迭代地更新所选择的AF和发​​射图像。 基于迭代更新的AF和/或发射图像来确定期望的发射图像和/或AF值。

公开(公告)号：US20170307703A1

公开(公告)日：2017-10-26

申请号：US15142957

申请日：2016-04-29

Applicant: General Electric Company

Inventor： Florian Wiesinger ,  Anne Menini ,  Ana Beatriz Solana Sanchez

IPC: G01R33/385 ,  G01R33/561 ,  G01R33/48

CPC classification number: G01R33/3854 ,  G01R33/4816 ,  G01R33/4824 ,  G01R33/4826 ,  G01R33/50 ,  G01R33/5616

Abstract: Methods and systems for production of silent, multi-gradient-echo, magnetic resonance images are provided. The methods employ iterative application of small updates to the magnetic field gradient followed by a short, non-selective radiofrequency pulse excitation and for free induction decay data acquisition. The magnetic field gradient updates allow for silent, self-refocusing pulse sequence. Subsequent applications of the magnetic field gradients allow for multiple echo data acquisitions, which may allow fast, silent production of T2*-weighted images.

公开(公告)号：US20160174919A1

公开(公告)日：2016-06-23

申请号：US14579039

申请日：2014-12-22

Applicant: General Electric Company

Inventor： Sangtae Ahn ,  Ravindra Mohan Manjeshwar ,  Florian Wiesinger ,  Dattesh Dayanand Shanbhag ,  Sandeep Suryanarayana Kaushik ,  Hua Qian ,  Anne Menini

IPC: A61B6/00 ,  G01T1/24 ,  G06T7/00 ,  A61B8/00 ,  A61B6/03 ,  A61B5/055 ,  A61B5/00 ,  A61B5/053 ,  G01R33/56 ,  G06T11/00

CPC classification number: A61B6/4417 ,  A61B5/0059 ,  A61B5/0536 ,  A61B5/055 ,  A61B6/032 ,  A61B6/037 ,  A61B6/5205 ,  A61B6/5258 ,  A61B8/4416 ,  G01R33/481 ,  G01R33/56 ,  G01T1/1603 ,  G01T1/1647 ,  G01T1/249 ,  G06T7/0012 ,  G06T11/003 ,  G06T11/006 ,  G06T2200/04 ,  G06T2207/10081 ,  G06T2207/10088 ,  G06T2207/10104 ,  G06T2207/30024 ,  G06T2207/30061 ,  G06T2211/40 ,  G06T2211/424

Abstract: Imaging system and method are presented. Emission scan (ES) and anatomical scan (AS) data corresponding to a target volume in a subject are received. One or more at least partial AS images are reconstructed using AS data. An image-space certainty (IC) map representing a confidence level (CL) for attenuation coefficients of selected voxels in AS images and a preliminary attenuation (PA) map based on AS images are generated. One or more of selected attenuation factors (AF) in projection-space are initialized based on PA map. A projection-space certainty (PC) map representing CL for the selected AF is generated based on IC map. An emission image of the target volume is initialized. The selected AF and emission image are iteratively updated based on the ES data, PC map, initial AF, and/or initial emission image. A desired emission image and/or AF values are determined based on the iteratively updated AF and/or emission image.

Abstract translation: 介绍了成像系统和方法。 接收与对象中的目标体积对应的发射扫描（ES）和解剖扫描（AS）数据。 使用AS数据重构一个或多个至少部分AS图像。 生成表示AS图像中的选定体素的衰减系数的置信水平（CL）和基于AS图像的初步衰减（PA）图的图像空间确定性（IC）图。 基于PA映射初始化投影空间中的一个或多个选择的衰减因子（AF）。 基于IC映射生成表示所选AF的CL的投影空间确定性（PC）映射。 初始化目标体积的发射图像。 基于ES数据，PC映射，初始AF和/或初始发射图像迭代地更新所选择的AF和发​​射图像。 基于迭代更新的AF和/或发射图像来确定期望的发射图像和/或AF值。