公开(公告)号：US20150287222A1

公开(公告)日：2015-10-08

申请号：US14677866

申请日：2015-04-02

Applicant: University of Virginia Patent Foundation

Inventor： Li Zhao ,  Craig H. Meyer

IPC: G06T11/00

CPC classification number: G01R33/50 ,  G01R33/5619

Abstract: Some aspects of the present disclosure relate to tissue parameter mapping. In one embodiment of the present disclosure, a method includes receiving undersampled k-space data corresponding to a dynamic physiological process in an area of interest of a subject. The method also includes estimating, from the undersampled k-space data, one or more respective tissue parameter values representing a respective state of the dynamic process at each point in time of a predetermined plurality of points in time during the acquisition. The estimation includes unscented Kalman filtering. The method also includes generating one or more tissue parameter maps using the respective plurality of estimated tissue parameter values.

Abstract translation: 本公开的一些方面涉及组织参数映射。 在本公开的一个实施例中，一种方法包括在对象的感兴趣区域中接收与动态生理过程相对应的欠采样k空间数据。 该方法还包括从欠采样的k空间数据中估计一个或多个相应的组织参数值，其表示在采集期间的预定多个时间点的每个时间点的动态过程的相应状态。 估计包括无密码卡尔曼滤波。 该方法还包括使用相应的多个估计的组织参数值来生成一个或多个组织参数图。

公开(公告)号：US09989611B2

公开(公告)日：2018-06-05

申请号：US14677877

申请日：2015-04-02

Applicant: University of Virginia Patent Foundation

Inventor： Li Zhao ,  Craig H. Meyer

IPC: G01V3/00 ,  G01R33/561 ,  G01R33/48

CPC classification number: G01R33/5611 ,  G01R33/4818 ,  G01R33/4824

Abstract: In image reconstruction using a variable-density spiral trajectory, a method includes acquiring magnetic resonance (MR) data, which includes determining a multi-level undersampling pattern based on sampling distance and probability functions, and determining a desired variable-density spiral trajectory based on the undersampling pattern. Acquiring the MR data also includes generating spiral gradient waveforms based on the desired trajectory, and tracing a variable-density spiral trajectory using the spiral gradient waveforms. After tracing, the MR data can be sub-sampled based on the variable-density spiral trajectory. One or more images can be reconstructed based on the acquired MR data.

公开(公告)号：US20150282733A1

公开(公告)日：2015-10-08

申请号：US14677915

申请日：2015-04-02

Applicant: University of Virginia Patent Foundation

Inventor： Samuel Fielden ,  Li Zhao ,  Wilson Miller ,  Xue Feng ,  Max Wintermark ,  Kim Butts Pauly ,  Craig H. Meyer

IPC: A61B5/055 ,  A61N7/02 ,  A61B5/01

CPC classification number: A61B5/055 ,  A61B5/015 ,  A61B5/725 ,  A61B2018/00791 ,  A61B2090/374 ,  A61N7/02

Abstract: Aspects of the present disclosure relate to magnetic resonance thermometry. In one embodiment, a method includes acquiring undersampled magnetic resonance data associated with an area of interest of a subject receiving focused ultrasound treatment, and reconstructing images corresponding to the area of interest based on the acquired magnetic resonance data, where the reconstructing uses Kalman filtering.

Abstract translation: 本公开的方面涉及磁共振测温。 在一个实施例中，一种方法包括获取与接收聚焦超声治疗的受试者的感兴趣区域相关联的欠采样磁共振数据，以及基于所获取的磁共振数据重构与所述感兴趣区域相对应的图像，其中所述重建使用卡尔曼滤波。