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    • 1. 发明申请
    • SYSTEM AND METHOD FOR IMAGE WARP CORRECTION FOR MAGNETIC RESONANCE IMAGING
    • 用于磁共振成像的图像温度校正的系统和方法
    • WO2016174497A1
    • 2016-11-03
    • PCT/IB2015/053059
    • 2015-04-27
    • SYNAPTIVE MEDICAL (BARBADOS) INC.PANTHER, Alexander GylesHARRIS, Chad TylerBEATTY, Phillip J.
    • PANTHER, Alexander GylesHARRIS, Chad TylerBEATTY, Phillip J.
    • G01R33/565
    • G01R33/56572G01R33/385G01R33/4818G01R33/4822
    • A method of correcting warping of an acquired image in an MRI system, caused by non- linearities in gradient field profiles of gradient coils is set forth, comprising a) constructing a computer model representing conducting pathways for each gradient coil in said MRI system; b) calculating a predicted magnetic field at each point in space for each said gradient coil in said model; c) measuring actual magnetic field at each point in space for each said gradient coil in said MRI system; d) verifying accuracy of said model by comparing said predicted magnetic field to said actual magnetic field at each said point in space and in the event said model is not accurate then repeating a) – d), and in the event said model is accurate then; constructing a distortion map for mapping coordinates in real space to coordinates in warped space of said acquired image based on deviations of said predicted magnetic field from linearity; and unwarping said warping of the acquired image using said distortion map.
    • 提出了一种校正由梯度线圈的梯度场分布中的非线性引起的MRI系统中获得的图像的翘曲的方法,包括:a)构建表示所述MRI系统中每个梯度线圈的导电路径的计算机模型; b)在所述模型中计算每个所述梯度线圈的每个空间点处的预测磁场; c)测量所述MRI系统中每个所述梯度线圈的每个空间点处的实际磁场; d)通过将所述预测磁场与空间中的每个所述点处的所述实际磁场进行比较并且在所述模型不准确然后重复a)至d)的情况下验证所述模型的精确度,并且在所述模型是准确的情况下 ; 根据所述预测磁场的偏离线性,构造用于将实空间中的坐标映射到所述获取图像的翘曲空间中的坐标的失真图; 并且使用所述失真图来不理想所获取的图像的所述翘曲。
    • 5. 发明申请
    • ADAPTIVE ELECTROMAGNET FOR HIGH PERFORMANCE MAGNETIC RESONANCE IMAGING
    • 用于高性能磁共振成像的自适应电磁铁
    • WO2016174498A1
    • 2016-11-03
    • PCT/IB2015/053062
    • 2015-04-27
    • SYNAPTIVE MEDICAL (BARBADOS) INC.HARRIS, Chad TylerPANTHER, Alexander GylesMCFADYEN, Stephen B.e.
    • HARRIS, Chad TylerPANTHER, Alexander GylesMCFADYEN, Stephen B.e.
    • G01R33/385G01R33/387
    • G01R33/381G01R33/3664G01R33/385G01R33/3875G01R33/4833G01R33/543H01F7/064
    • A method of configuring a conducting grid of elements interconnected at intersecting nodes by switches is described. The method includes: constructing a background grid by connection of centroids of the cell shape of the conducting grid; identifying a subset of elements in the background grid that intersect the smooth pattern of loops; identifying a subset of elements in the conducting grid that intersect the subset of elements in the background grid; the subset of elements in the conducting grid forming a discretized pattern of loops representing the smooth pattern of loops; for each of the discretized pattern of loops identifying current-in and current-out nodes; altering the on-off state of individual switches in accordance with the discretized pattern of loops; opening the switch between each respective pair of current-in and current out nodes; and applying power to the conducting grid via at least one pair of the input and output current nodes such that the current flow through the elements generates the magnetic field profile.
    • 描述了通过交换机在交叉节点处互连的元件的导电栅格的配置方法。 该方法包括:通过连接导电栅格的单元格形状的质心来构建背景网格; 识别背景网格中与循环平滑模式相交的元素的子集; 识别导电网格中与背景网格中的元素子集相交的元素的子集; 导电栅格中的元素的子集形成表示环的平滑图案的环的离散模式; 对于每个离散的模式的环路识别电流输入和电流输出节点; 根据循环的离散模式改变各个开关的开关状态; 在每个相应的一对电流输入和当前输出节点之间打开开关; 以及经由至少一对所述输入和输出电流节点向所述导电栅格施加电力,使得通过所述元件的电流产生所述磁场分布。
    • 8. 发明申请
    • SYSTEM AND METHOD FOR MAPPING NAVIGATION SPACE TO PATIENT SPACE IN A MEDICAL PROCEDURE
    • 用于在医疗过程中将导航空间映射到患者空间的系统和方法
    • WO2017011892A1
    • 2017-01-26
    • PCT/CA2015/050677
    • 2015-07-21
    • SYNAPTIVE MEDICAL (BARBADOS) INC.SELA, GalLUI, DorothyPANTHER, Alexander GylesDYER, Kelly Noel
    • SELA, GalLUI, DorothyPANTHER, Alexander GylesDYER, Kelly Noel
    • A61B19/00G06F19/00A61B6/03A61B5/055A61B8/13
    • A61B5/055A61B5/064A61B34/20A61B2034/2055A61B2034/2068A61B2090/363A61B2576/00G06F19/00G06T7/33G06T2207/10004G06T2207/10072G06T2207/20101
    • A medical navigation system is provided for registering a patient for a medical procedure with the medical navigation system using fiducial markers. The fiducial markers are placed on the patient prior to a 3D scan and the fiducial markers each have a target for use with a tracking system. The medical navigation system comprises a 3D scanner, a tracking system, a display, and a controller electrically coupled to the 3D scanner, the tracking system, and the display. The controller has a processor coupled to a memory. The controller is configured to: receive 3D scan data generated by the 3D scanner representative of a 3D scan of at least a portion of the patient, the 3D scan including the fiducial markers visible by the 3D scanner; load from the memory saved medical image data, the saved medical data including preoperative image data saved during a previous scan of at least a portion of the patient; receive position data from the tracking system based on the target for each of the fiducial markers; and perform a transformation mapping to create a single unified virtual coordinate space based on the 3D scan data, the position data, and the medical image data, and updating registration data of the medical navigation system based on the transformation mapping.
    • 提供医疗导航系统,用于使用基准标记物向医疗导航系统登记用于医疗程序的患者。 在3D扫描之前,将基准标记放置在患者身上,并且基准标记各自具有用于跟踪系统的目标。 医疗导航系统包括3D扫描器,跟踪系统,显示器和电耦合到3D扫描器,跟踪系统和显示器的控制器。 控制器具有耦合到存储器的处理器。 控制器被配置为:接收由3D扫描仪生成的3D扫描数据,3D扫描器代表患者的至少一部分的3D扫描,3D扫描包括由3D扫描器可见的基准标记; 来自存储器的加载保存的医学图像数据,所保存的医学数据包括在患者的至少一部分的先前扫描期间保存的术前图像数据; 基于每个基准标记的目标从跟踪系统接收位置数据; 并且基于3D扫描数据,位置数据和医学图像数据执行变换映射以创建单个统一虚拟坐标空间,以及基于变换映射来更新医疗导航系统的注册数据。