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21.发明授权
公开(公告)号：US5694142A
公开(公告)日：1997-12-02
申请号：US340783
申请日：1994-11-17
IPC分类号： A61B17/00 , A61B6/03 , A61B19/00 , G06F3/00 , G06F3/01 , G06F19/00 , G06T1/00 , G06T17/40 , G09G5/00
CPC分类号： G06F3/013 , A61B90/36 , G06F19/321 , G06F19/3437 , G06F19/3481 , A61B2090/365 , A61B2090/371 , A61B2090/372 , A61B2090/502 , G06F19/3406
摘要： An interactive three-dimensional (3D) pointing device for selecting points within a subject employs a tracking device which determines the position of the operator, a semi-transparent screen positioned by the operator and the subject and provides this information to a model workstation. The model workstation superimposes computer graphic images of internal structures of the subject on a the semi-transparent screen through which the operator is viewing the subject. The superimposed image is derived from image data either previously generated and stored or obtained with an imaging system. The images of the internal structures are registered with the operator's view of the external structures of the operator. The operator interactively views internal and external structures and the relation between them simultaneously, while moving the screen to select 3D target points at an image depth within the subject. Optionally other input devices may be used to identify current `target points` as selected points. The 3D points are then provided to an output device which utilizes them. Another embodiment employs stereoscopic viewing methods to provide 3D representations of the internal images superimposed on external structures to allow the operator to employ parallax to select 3D points.
摘要翻译： 用于选择对象内的点的交互式三维（3D）定点设备使用确定操作者的位置的跟踪设备，由操作员和被摄体定位的半透明屏幕，并将该信息提供给模型工作站。 模型工作站将被摄体的内部结构的计算机图形图像叠加在操作者正在观看主体的半透明屏幕上。 叠加的图像从先前生成并存储或获得成像系统的图像数据导出。 内部结构的图像以操作员对操作者的外部结构的视图进行记录。 操作者在移动屏幕的同时在内部和外部结构以及它们之间的关系上交互地观察在主体内的图像深度处选择3D目标点。 可选地，可以使用其他输入设备来将当前的“目标点”识别为所选择的点。 然后将3D点提供给利用它们的输出装置。 另一实施例采用立体观看方法来提供叠加在外部结构上的内部图像的3D表示，以允许操作者使用视差来选择3D点。
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公开(公告)号：US08024025B2
公开(公告)日：2011-09-20
申请号：US12114888
申请日：2008-05-05
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。
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公开(公告)号：US07573267B1
公开(公告)日：2009-08-11
申请号：US12017006
申请日：2008-01-19
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。
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公开(公告)号：US06492814B1
公开(公告)日：2002-12-10
申请号：US09683404
申请日：2001-12-21
IPC分类号： G01V300
CPC分类号： G01R33/341
摘要： A self-localizing receive coil system for use with a Magnetic Resonance Imaging (MRI) system comprises at least one surface coil assembly for placement adjacent to a region of interest to be imaged and a plurality of tracking devices attached to the surface coil assembly for use in indicating location and orientation of the surface coil assembly during imaging.
摘要翻译： 用于与磁共振成像（MRI）系统一起使用的自定位接收线圈系统包括至少一个表面线圈组件，用于邻近要成像的感兴趣区域放置，以及附接到表面线圈组件以用于的多个跟踪装置 在成像期间指示表面线圈组件的位置和取向。
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公开(公告)号：US06289233B1
公开(公告)日：2001-09-11
申请号：US09199405
申请日：1998-11-25
IPC分类号： A61B5055
CPC分类号： A61B5/7257 , A61B5/055 , A61B5/06 , A61B5/065 , A61B34/20 , A61B90/37 , A61B2034/2051 , A61B2090/374 , G01R33/285
摘要： An MRI system acquires NMR tracking data from a tracking coil imbedded in a medical device which is guided by a physician using real time anatomic images produced from image data acquired by the MRI system. A Hadamard magnetic resonance tracking sequence is used to update the tracking coil location which is indicated on the anatomic image. The Hadamard sequence uses four different acquisition, but tracking coil location is updated after each acquisition, using the new acquisition and three previously acquired acquisitions.
摘要翻译： MRI系统从埋藏在医疗装置中的跟踪线圈获取NMR跟踪数据，该跟踪线圈由医师使用由MRI系统获取的图像数据产生的实时解剖图像进行引导。 使用Hadamard磁共振跟踪序列来更新在解剖图像上指示的跟踪线圈位置。 Hadamard序列使用四种不同的采集方式，但是每次采集后跟踪线圈位置都将被更新，使用新的采集和三次以前采集的采集。
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公开(公告)号：US06246896B1
公开(公告)日：2001-06-12
申请号：US09198632
申请日：1998-11-24
IPC分类号： A61B505
CPC分类号： A61B18/1492 , A61B5/055 , A61B5/06 , A61B34/20 , A61B2017/00084 , A61B2018/00351 , A61B2018/00577 , A61B2034/2051 , A61B2090/374 , A61B2090/3975
摘要： An MRI system acquires NMR tracking data from a tracking coil imbedded in an ablation device which is guided by a physician using real time anatomic images produced from image data acquired by the MRI system. The same tracking coil is energized by an RF power source to deliver energy which ablates tissue after the device is guided into proper position.
摘要翻译： MRI系统从嵌入在消融装置中的跟踪线圈获取NMR跟踪数据，其由医师使用由MRI系统获取的图像数据产生的实时解剖图像来引导。 相同的跟踪线圈由RF电源通电，以在器件被引导到适当位置之后传递消融组织的能量。
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27.发明授权System to monitor temperature near an invasive device during magnetic resonance procedures 失效在磁共振程序期间监测侵入性装置附近的温度的系统
公开(公告)号：US5730134A
公开(公告)日：1998-03-24
申请号：US714840
申请日：1996-09-09
CPC分类号： A61B5/01 , A61B5/055 , G01R33/287 , G01R33/4804
摘要： A temperature monitoring system employs a temperature detection means incorporated into an invasive device intended to be placed within a body during a magnetic resonance procedure. The temperature monitoring system is used to monitor temperature rises in tissue arising from the creation of electric fields within the tissue. These electric fields are created by the application of RF pulses during the course of a magnetic resonance procedure which induce electrical current in the invasive device. It the detected temperature rise exceeds a selected threshold, the temperature monitoring system can cause the magnetic resonance imaging system to either reduce RF power or terminate the procedure. An optical coupling may be used between the imaging or tracking RF coil and the MR receiver to eliminate heating induced by the application of RF pulses during the procedure.
摘要翻译： 温度监测系统采用将温度检测装置并入到旨在在磁共振程序期间放置在体内的侵入性装置中。 温度监测系统用于监测组织内产生的电场产生的组织温度升高。 这些电场是通过在磁共振过程中施加RF脉冲而产生的，其在侵入性装置中引起电流。 检测到的温度上升超过选定的阈值，温度监测系统可以使磁共振成像系统降低RF功率或终止程序。 可以在成像或跟踪RF线圈和MR接收器之间使用光耦合器来消除在该过程期间由RF脉冲施加引起的加热。
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公开(公告)号：US5671739A
公开(公告)日：1997-09-30
申请号：US698700
申请日：1996-08-16
CPC分类号： A61B5/721 , A61B34/20 , A61B5/06 , A61B5/1135 , A61B8/0833 , A61B8/5276 , A61B2017/00694 , A61B5/7289
摘要： A tracking system monitors the position of a device within a subject and superimposes a graphic symbol on a diagnostic image of the subject. Registration of the tracked location with the diagnostic image is maintained in the presence of subject motion by monitoring subject motion and adjusting the display to compensate for subject motion. Motion monitoring can be performed with ultrasonic, optical or mechanical methods. The display can be adjusted by modifying the displayed location of the device or it can be adjusted by translating, rotating or distorting the diagnostic image.
摘要翻译： 跟踪系统监视对象内的设备的位置并将图形符号叠加在被摄体的诊断图像上。 通过监视对象运动并调整显示以补偿被摄体运动，通过诊断图像对被跟踪位置的注册保持在受试者运动的存在下。 运动监测可以用超声波，光学或机械方法进行。 可以通过修改显示的设备位置来调整显示，也可以通过翻译，旋转或扭曲诊断图像进行调整。
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29.发明申请SYSTEMS AND METHODS FOR USING FERRITE ALIGNMENT KEYS IN WIRELESS REMOTE SENSORS 有权在无线远程传感器中使用铁素体对准键的系统和方法公开(公告)号：US20100141273A1
公开(公告)日：2010-06-10
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： G01R27/28
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，位于拾取线圈中并且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。
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30.发明授权Error compensation for device tracking systems employing electromagnetic fields 失效使用电磁场的设备跟踪系统的误差补偿公开(公告)号：US06201987B1
公开(公告)日：2001-03-13
申请号：US09084336
申请日：1998-05-26
IPC分类号： A61B505
CPC分类号： G01R33/285 , G01R33/56518
摘要： The present invention is capable of more accurately tracking an invasive device in a subject's body in the presence of eddy current inducing structures. Current patterns applied to the tracking system's transmit coils are modified to compensate for the effect of the eddy currents. The current supplied to the coils is a linear combination of the current needed to create the desired electromagnetic field in the region of interest; and one or more error terms. These terms are determined experimentally during system calibration and are mathematically modeled as a series of exponential functions having a given amplitude and time constant. The error terms in the current applied to the transmit coils cancel the magnetic fields created by eddy currents within the tracking region and result in an actual electromagnetic field which is close to the desired ideal electromagnetic field. The fidelity of the electromagnetic field is further increased by reducing eddy currents within the eddy current inducing structures. This is done by constructing shield coils which are placed between the transmit coil and the eddy current inducing structures. These shield coils create canceling magnetic fields within the eddy current inducing structures without substantially altering the electromagnetic fields in the region over which the invasive device is tracked.
摘要翻译： 本发明能够在存在涡流诱导结构的情况下更准确地跟踪受检者体内的侵入性装置。 施加到跟踪系统的发射线圈的电流模式被修改以补偿涡流的影响。 提供给线圈的电流是在感兴趣的区域中产生期望的电磁场所需的电流的线性组合; 和一个或多个错误项。 这些术语在系统校准期间由实验确定，并且在数学上被建模为具有给定幅度和时间常数的一系列指数函数。 施加到发射线圈的电流中的误差项抵消由跟踪区域内的涡流产生的磁场，并导致接近期望的理想电磁场的实际电磁场。 通过减小涡流诱导结构内的涡流来进一步提高电磁场的保真度。 这是通过构造放置在发射线圈和涡流引导结构之间的屏蔽线圈来完成的。 这些屏蔽线圈在涡电流感生结构内产生消除磁场，而基本上不改变侵入设备被跟踪的区域中的电磁场。
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