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43 条记录 (耗时 0.036 秒)

    Method and system for extended volume imaging using MRI with parallel reception
    23.
    发明授权
    Method and system for extended volume imaging using MRI with parallel reception 有权
    使用具有并行接收的MRI进行扩展体积成像的方法和系统

    公开(公告)号：US07009396B2

    公开(公告)日：2006-03-07

    申请号：US10065036

    申请日：2002-09-12

    申请人： Yudong Zhu ,  Charles Lucian Dumoulin

    发明人： Yudong Zhu ,  Charles Lucian Dumoulin

    IPC分类号： G01V3/00 ,  A61B5/055

    CPC分类号： G01R33/5611 ,  G01R33/56375

    摘要： A method and apparatus for producing an image from an extended volume of interest within a subject using a Magnetic Resonance Imaging (MRI) system are provided. The method comprises translating the volume using a positioning device along an axis of the MRI system. A plurality of MR signals are detected from at least one radiofrequency (RF) coil array for a given field-of-view within the MRI system as the positioning device is translated. The plurality of MR signals are sent to a plurality of receivers wherein the receivers are each adapted to adjust their respective center frequencies at a rate commensurate with a rate of translation of the positioning device. A plurality of respective sub-images corresponding to the plurality MR signals for each of the plurality of receivers are combined to form a composite image of the volume of interest.

    摘要翻译： 提供了一种用于使用磁共振成像（MRI）系统从受试者内的扩展感兴趣体积产生图像的方法和装置。 该方法包括使用定位装置沿着MRI系统的轴平移体积。 当定位装置被平移时，从用于MRI系统内的给定视野的至少一个射频（RF）线圈阵列检测多个MR信号。 多个MR信号被发送到多个接收机，其中接收机各自适于以与定位设备的平移速率相称的速率调整它们各自的中心频率。 对应于多个接收机中的每一个的多个MR信号的多个相应子图像被组合以形成感兴趣体积的合成图像。

    Method and system for tracking small coils using magnetic resonance
    24.
    发明授权
    Method and system for tracking small coils using magnetic resonance 失效
    使用磁共振跟踪小线圈的方法和系统

    公开(公告)号：US06687530B2

    公开(公告)日：2004-02-03

    申请号：US09683394

    申请日：2001-12-21

    申请人： Charles Lucian Dumoulin

    发明人： Charles Lucian Dumoulin

    IPC分类号： A61B5055

    CPC分类号： A61B5/055 ,  A61B5/06 ,  G01R33/285

    摘要： A method and system for tracking the location of a device within the field of view of a Magnetic Resonance Imaging (MRI) system are provided. The method comprises computing a centroid of signal intensity in a region centered about a location of maximum signal intensity, Lmax of acquired magnetic resonance (MR) signals corresponding to the device.

    摘要翻译： 提供了一种用于跟踪在磁共振成像（MRI）系统的视野内的设备的位置的方法和系统。 该方法包括在以最大信号强度的位置为中心的区域中计算信号强度的质心，所述区域与所述装置对应的获取的磁共振（MR）信号的Lmax。

    Method and system for extended volume imaging using MRI
    25.
    发明授权
    Method and system for extended volume imaging using MRI 有权
    使用MRI进行扩展体积成像的方法和系统

    公开(公告)号：US06584337B2

    公开(公告)日：2003-06-24

    申请号：US09683124

    申请日：2001-11-21

    申请人： Charles Lucian Dumoulin ,  Yudong Zhu

    发明人： Charles Lucian Dumoulin ,  Yudong Zhu

    IPC分类号： A61B5055

    CPC分类号： A61B5/055

    摘要： A method and apparatus for producing an image from an extended volume of interest using a Magnetic Resonance Imaging (MRI) system are provided. The apparatus comprises a magnet assembly, a gradient coil assembly, at least one radiofrequency coil, a positioning device for translating the volume using along an axis of the MRI system and a plurality of receivers. A plurality of MR signals are detected from the radiofrequency (RF) coil, as the positioning device is translated, and are sent to the plurality of receivers. Each of the receivers are configured to be adjusted in either phase or frequency in response to the positioning device being translated. A plurality of respective sub-images are computed corresponding to the plurality of MR signals for each of the receivers and for the given field-of-view (FOV) at each of the incremented positions. A composite image of the volume of interest is formed by combining the respective sub-images.

    摘要翻译： 提供了使用磁共振成像（MRI）系统从扩展的感兴趣体积生成图像的方法和装置。 该装置包括磁体组件，梯度线圈组件，至少一个射频线圈，用于使用沿着MRI系统的轴平移体积的定位装置和多个接收器。 当定位装置被转换时，从射频（RF）线圈检测多个MR信号，并将其发送到多个接收机。 每个接收器被配置为响应于被平移的定位装置在任一阶段或频率中进行调整。 对应于每个接收机的多个MR信号以及在每个递增位置处的给定视场（FOV），对多个相应的子图像进行计算。 通过组合各个子图像来形成感兴趣体积的合成图像。

    Systems and methods for using ferrite alignment keys in wireless remote sensors
    26.
    发明授权
    Systems and methods for using ferrite alignment keys in wireless remote sensors 有权
    在无线遥控传感器中使用铁氧体对准键的系统和方法

    公开(公告)号：US07948385B2

    公开(公告)日：2011-05-24

    申请号：US12330590

    申请日：2008-12-09

    申请人： Radislav Alexandrovich Potyrailo ,  William Guy Morris ,  Charles Lucian Dumoulin ,  Cheryl Margaret Surman

    发明人： Radislav Alexandrovich Potyrailo ,  William Guy Morris ,  Charles Lucian Dumoulin ,  Cheryl Margaret Surman

    IPC分类号： G08B13/14

    CPC分类号： G01L9/007 ,  G06K7/10316 ,  G06K19/0716 ,  G06K19/0723

    摘要： The present invention related to devices and methods for using ferrite alignment keys in wireless remote sensor assemblies. In one aspect, the invention provides wireless resonant sensor assemblies comprising a pick-up coil, a ferrite alignment key positioned in and extending from the pick-up coil, and wireless resonant sensor having a receiving element wherein the pick-up coil and the wireless resonant sensor align upon insertion of the ferrite alignment key into the receiving element. The ferrite alignment key may also be part of a resonant sensor such that insertion of a pick-up coil into a receiving element of the alignment key results in a configuration where the alignment key is positioned in and extended from the pick-up coil. Methods of measuring one or more parameters of a monitoring system are also provided. The insertion of the ferrite alignment key aligns the pick-up coil and wireless resonant sensor thereby increasing sensing of the wireless resonant sensor by the pick-up coil.

    摘要翻译： 本发明涉及在无线遥控传感器组件中使用铁氧体对准键的装置和方法。 一方面，本发明提供了无线谐振传感器组件，其包括拾取线圈，位于拾取线圈中并从拾取线圈延伸的铁氧体对准键，以及具有接收元件的无线谐振传感器，其中拾取线圈和无线 谐振传感器在将铁氧体对准键插入接收元件时对准。 铁氧体对准键也可以是谐振传感器的一部分，使得拾取线圈插入到对准键的接收元件中，导致对准键位于拾取线圈中并从拾取线圈延伸的配置。 还提供了测量监测系统的一个或多个参数的方法。 铁氧体对准键的插入使得拾取线圈和无线谐振传感器对准，从而增加了拾音线圈对无线谐振传感器的感测。

    MRI measurement of blood vessel wall compliance
    27.
    发明授权
    MRI measurement of blood vessel wall compliance 失效
    MRI测量血管壁依从性

    公开(公告)号：US06288541B1

    公开(公告)日：2001-09-11

    申请号：US09378934

    申请日：1999-08-23

    申请人： Charles Lucian Dumoulin

    发明人： Charles Lucian Dumoulin

    IPC分类号： G01V300

    CPC分类号： G01R33/56308 ,  G01R33/4835 ,  G01R33/56316

    摘要： An MRI system repeatedly performs a pulse sequence during a time interval &Dgr;T in which a surge of blood flows through a vessel whose compliance is to be measured. Two spaced-apart slices are simultaneously excited by each pulse sequence and the transverse magnetization is flow-encoded before an NMR signal is acquired in the presence of a readout gradient pulse. The change in phase of the NMR signal is used to detect when the wave arrives at each slice location, and from this information blood vessel compliance may be calculated.

    摘要翻译： MRI系统在时间间隔DELTAT期间重复地执行脉冲序列，其中血液涌动通过要测量其顺应性的血管。 两个间隔开的切片同时被每个脉冲序列激发，并且在存在读出梯度脉冲之前获得NMR信号之前，横向磁化被流式编码。 NMR信号的相位变化用于检测波在每个切片位置何时到达，并且可以从该信息计算血管顺应性。

    Patient electrical isolation system
    28.
    发明授权
    Patient electrical isolation system 失效
    病人电气隔离系统

    公开(公告)号：US5807253A

    公开(公告)日：1998-09-15

    申请号：US944631

    申请日：1997-10-06

    申请人： Charles Lucian Dumoulin ,  Kenneth William Rohling ,  Ronald Dean Watkins ,  Randy Otto John Giaquinto

    发明人： Charles Lucian Dumoulin ,  Kenneth William Rohling ,  Ronald Dean Watkins ,  Randy Otto John Giaquinto

    IPC分类号： G01B7/00 ,  A61B5/055 ,  A61B5/06 ,  A61M25/00 ,  A61B1/00

    CPC分类号： A61B5/06 ,  A61B5/055 ,  Y10S128/908

    摘要： A patient isolation device is used as a safety device to provide electrical insulation between medical electronic equipment and portions of the equipment which come in contact with the patient. In one implementation of the patient isolation device, an RF coil is incorporated in a catheter connected to medical electronic equipment which tracks the position of the catheter. Typically, there is also medical imaging electronics to provide internal images of the subject along with an indication of the location of the catheter. Typically, the signal from the RF coil is provided to a preamplifier to amplify the signal. The isolation device is placed between the RF coil and the preamplifier such that MR response signals may pass through to the preamplifiers but in the event of a short or electrical malfunction the line voltage will not pass backward into the RF coil causing damage to the patient.

    摘要翻译： 患者隔离装置用作安全装置，以在医疗电子设备与与患者接触的设备的部分之间提供电绝缘。 在患者隔离装置的一个实施方式中，将RF线圈并入连接到跟踪导管位置的医疗电子设备的导管中。 通常，还提供医疗成像电子装置以提供对象的内部图像以及导管位置的指示。 通常，来自RF线圈的信号被提供给前置放大器以放大信号。 隔离装置被放置在RF线圈和前置放大器之间，使得MR响应信号可以通过前置放大器，但是在短路或电气故障的情况下，线路电压将不会向后进入RF线圈，从而导致患者的损坏。

    T1-corrected proton resonance frequency shift thermometry
    29.
    发明授权
    T1-corrected proton resonance frequency shift thermometry 失效
    T1校正质子共振频移温度测量

    公开(公告)号：US08024025B2

    公开(公告)日：2011-09-20

    申请号：US12114888

    申请日：2008-05-05

    申请人： Richard Philip Mallozzi ,  Charles Lucian Dumoulin

    发明人： Richard Philip Mallozzi ,  Charles Lucian Dumoulin

    IPC分类号： A61B5/05

    CPC分类号： G01R33/565 ,  G01R33/4804 ,  G01R33/4808 ,  G01R33/5602 ,  G01R33/56509 ,  G01R33/56563

    摘要： An apparatus and method for correcting magnetic resonance temperature measurements is disclosed. In one aspect, the method identifies monitoring regions of interest outside a therapeutic region of interest. Next, a pulse sequence sensitive to changes in T1 and proton density is used to measure the temperature changes in these regions. Next, the PRFS is measured in these same regions. The PRFS in these regions will be caused both by the desired shift from temperature change, and the undesired shift from background magnetic field changes. Using the measured temperature changes from the T1-method, the component of the PRFS due to actual temperature changes is subtracted from the PRFS method, leaving only the component caused by the unwanted magnetic field changes. This analysis is performed separately for each region. At the end of this step, one has measured the change in background magnetic field within each region.

    摘要翻译： 公开了用于校正磁共振温度测量的装置和方法。 在一个方面，该方法识别感兴趣的治疗区域之外的感兴趣的感兴趣区域。 接下来，使用对T1和质子密度变化敏感的脉冲序列来测量这些区域中的温度变化。 接下来，在这些相同的区域中测量PRFS。 这些区域中的PRFS将由温度变化的期望转变和来自背景磁场变化的不希望的偏移引起。 使用T1测量的温度变化，从PRFS方法中减去由于实际温度变化导致的PRFS分量，仅留下由不需要的磁场引起的分量变化。 对每个区域分别进行分析。 在该步骤结束时，测量了每个区域内的背景磁场的变化。

    System and method for active MR tracking
    30.
    发明授权
    System and method for active MR tracking 有权
    有源MR跟踪的系统和方法

    公开(公告)号：US07573267B1

    公开(公告)日：2009-08-11

    申请号：US12017006

    申请日：2008-01-19

    申请人： Richard Philip Mallozzi ,  Charles Lucian Dumoulin

    发明人： Richard Philip Mallozzi ,  Charles Lucian Dumoulin

    IPC分类号： G01V3/00

    CPC分类号： G01R33/287 ,  A61B5/055 ,  G01R33/34084 ,  G01R33/3678 ,  G01R33/483

    摘要： A system and method for active MR tracking includes a magnetic resonance imaging (MRI) system having a plurality of gradient coils positioned about a bore of a magnet, an RF coil assembly positioned in the bore, and a pulse module. The MRI system also includes a polarization reversal switch controlled by the pulse module to transmit RF signals to the RF coil assembly coupled to the polarization reversal switch and an RF switch controlled by the pulse module to transmit the RF signals to the polarization reversal switch.

    摘要翻译： 用于主动MR跟踪的系统和方法包括磁共振成像（MRI）系统，其具有围绕磁体的孔定位的多个梯度线圈，位于孔中的RF线圈组件和脉冲模块。 MRI系统还包括由脉冲模块控制的偏振反转开关，以将RF信号传输到耦合到偏振反转开关的RF线圈组件和由脉冲模块控制的RF开关，以将RF信号传输到偏振反转开关。