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    • 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。
    • 6. 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。
    • 7. 发明申请
    • CEREBROSPINAL DIFFUSION PHANTOM
    • 骨髓扩张剂
    • WO2017035626A1
    • 2017-03-09
    • PCT/CA2015/050849
    • 2015-09-04
    • SYNAPTIVE MEDICAL (BARBADOS) INC.KERINS, FergalWHITTON, Gregory AllanGMEINER, Timotheus AntonSTAINSBY, Jeff AlanHARRIS, Chad TylerTHINGVOLD, Sheryl Rae
    • KERINS, FergalWHITTON, Gregory AllanGMEINER, Timotheus AntonSTAINSBY, Jeff AlanHARRIS, Chad TylerTHINGVOLD, Sheryl Rae
    • G09B23/30A61B5/055
    • G01R33/58A61B5/055G01R33/4806G01R33/56341G09B23/30
    • Disclosed herein are cerebrospinal diffusion phantoms which include a housing having a shape and size configured for insertion into a magnetic resonance coil in one or more preselected poses. A scaffold support structure is mounted on an interior of said housing and a plurality of elongated diffusion mimicking members supported on the support array. The elongated diffusion mimicking members are affixed to the scaffold support structure such that elongated diffusion mimicking members extend in directions needed to substantially emulate a 3 dimensional arrangement of cerebrospinal diffusion fiber tracts in a living organism; as well as modules for elimination of resolution based-bias, angular accuracy evaluation, diffusion rate calibration, and quality assurance image referencing. Each elongated diffusion mimicking member includes an aqueous component which can undergo diffusion along the elongated diffusion mimicking member. The phantom includes a cerebrospinal tissue mimic matrix material contained in the housing enveloping the array of elongated diffusion mimicking members. The housing is made of a material whose magnetic susceptibility substantially matches that of the cerebrospinal mimic matrix material.
    • 这里公开的是脑脊液扩散体,其包括壳体,该壳体的形状和尺寸被配置为在一个或多个预选姿势中插入到磁共振线圈中。 脚手架支撑结构安装在所述壳体的内部和支撑在支撑阵列上的多个细长扩散模拟构件。 细长的扩散模拟构件被固定到支架支撑结构上,使得细长的扩散模拟构件在基本上模拟生物体中脑脊髓扩散纤维束的3维排列所需的方向上延伸; 以及用于消除基于分辨率偏差,角度精度评估,扩散速率校准和质量保证图像引用的模块。 每个细长扩散模拟构件包括可以沿着细长扩散模拟构件扩散的水性组分。 幻影包括包含在壳体中的脑脊液组织模拟基质材料,其包围细长的扩散模拟构件阵列。 壳体由其磁化率基本上与脑脊液模拟基质材料的磁化率相匹配的材料制成。
    • 9. 发明申请
    • SYSTEM AND METHOD FOR ELECTROMAGNET COIL CONSTRUCTION
    • 电磁线圈结构的系统与方法
    • WO2016090453A1
    • 2016-06-16
    • PCT/CA2014/000873
    • 2014-12-09
    • SYNAPTIVE MEDICAL (BARBADOS) INC.BINDSEIL, GeronHARRIS, Chad Tyler
    • BINDSEIL, GeronHARRIS, Chad Tyler
    • G01R33/381G01R33/3875H01F41/04
    • G01R33/381G01R33/0052G01R33/385G01R33/3854G01R33/3875H01F41/04
    • A method of manufacturing electromagnet coils for use in a magnetic resonance imaging (MRI) system is provided. The electromagnet coils are located in a non-homogeneous external magnetic field. The method comprises forming a coil representation of a coil surface for the electromagnet coils; setting limits for performance metrics for the electromagnet coils including a magnetic field-shape metric and at least one of an external torque metric and an external force metric, the external torque metric and the external force metric based, respectively, at least in part on a torque and a force exerted on the electromagnet coil by the non-homogeneous external magnetic field; forming a performance functional, based on the coil representation and the performance metrics, for generating a current density pattern over the coil surface; optimizing the performance functional and generating a current density pattern based on the optimized performance functional; and obtaining coil windings.
    • 提供一种制造用于磁共振成像(MRI)系统的电磁线圈的方法。 电磁线圈位于非均匀的外部磁场中。 该方法包括形成用于电磁线圈的线圈表面的线圈表示; 设置包括磁场形状度量的电磁线圈的性能指标的限制,以及外部扭矩度量和外力度量中的至少一种,外部扭矩度量和外力度量分别至少部分地基于 扭矩和由非均匀外部磁场施加在电磁线圈上的力; 基于线圈表示和性能度量形成用于在线圈表面上产生电流密度模式的性能功能; 基于优化的性能功能优化性能功能并产生电流密度模式; 并获得线圈绕组。