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    Magnetic resonance method and apparatus to separate depiction of a tracked item from surrounding anatomy of a patient, using a transmit array system
    12.
    发明授权
    Magnetic resonance method and apparatus to separate depiction of a tracked item from surrounding anatomy of a patient, using a transmit array system 有权
    磁共振方法和装置，使用发射阵列系统分离被跟踪物品与患者周围解剖结构的描绘

    公开(公告)号：US08798713B2

    公开(公告)日：2014-08-05

    申请号：US13087621

    申请日：2011-04-15

    Applicant: Haydar Celik ,  Ergin Atalar

    Inventor： Haydar Celik ,  Ergin Atalar

    IPC: A61B5/055

    CPC classification number: A61B5/062 ,  A61B5/055

    Abstract: In a method for detecting rotational orientation and position tracking of an inductively coupled RF (ICRF) coil using a transmit array system, a conventional body birdcage coil is used, but the quadrature hybrid is eliminated to use the two excitation-channels separately. The transmit array system provides RF excitations such that the body birdcage coil creates linearly polarized and circulating RF pulses instead of a conventional rotational forward polarized excitation. Inductively coupled RF (ICRF) coils can be constructed on catheters for detecting rotational orientation and tracking purposes. The modifications on anatomy and ICRF coil images are different due to the RF excitation scheme such that the ICRF coil can be separated from the anatomy in real-time. After separating the ICRF coil from the anatomy, a color-coded image can be reconstructed, for example.

    Abstract translation: 在使用发射阵列系统检测电感耦合RF（ICRF）线圈的旋转取向和位置跟踪的方法中，使用常规的身体鸟笼线圈，但是消除正交混合以分别使用两个激励信道。 发射阵列系统提供RF激励，使得主体鸟笼线圈产生线性偏振和循环RF脉冲，而不是传统的旋转正向偏振激励。 电感耦合RF（ICRF）线圈可以构建在用于检测旋转取向和跟踪目的的导管上。 解剖和ICRF线圈图像的修改由于RF激励方案而不同，使得ICRF线圈可以与解剖结构实时分离。 在将ICRF线圈与解剖结构分开之后，例如可以重建颜色编码的图像。

    Active MRI intramyocardial injection catheter with deflectable distal section
    13.
    发明授权
    Active MRI intramyocardial injection catheter with deflectable distal section 有权
    主动MRI心肌内注射导管具有可偏转的远端部分

    公开(公告)号：US08260399B2

    公开(公告)日：2012-09-04

    申请号：US12757961

    申请日：2010-04-09

    Applicant: Parag V. Karmarkar ,  Ergin Atalar

    Inventor： Parag V. Karmarkar ,  Ergin Atalar

    IPC: A61B5/055

    CPC classification number: G01R33/287 ,  A61M25/0127 ,  A61M25/0136 ,  A61M25/0138 ,  A61M25/0147 ,  G01R33/34084

    Abstract: A deflectable tip catheter that is safe and effective for use in a magnetic resonance imaging environment. The deflectable tip catheter is configured such that it includes a built-in antenna, such as a loopless antenna or a loop antenna. The built-in antenna permits the deflectable tip catheter to be actively tracked and/or visualized. Depending upon the specific configuration of the deflectable tip catheter, the catheter may be tracked and/or visualized as a single unit, it may be tracked and/or visualized separate and independent of other components or instruments associated with the catheter, such as pull wires, injection needles, surgical instruments, and the like. The catheters described herein include injection type catheters and/or guidance type catheters.

    Abstract translation: 一种可偏转的尖端导管，可安全有效地用于磁共振成像环境。 可偏转尖端导管被配置为使得其包括内置天线，例如无凹凸天线或环形天线。 内置天线允许可偏转的尖端导管被主动跟踪和/或可视化。 根据可偏转尖端导管的具体构造，导管可以作为单个单元进行跟踪和/或可视化，其可被跟踪和/或可视化分开并独立于与导管相关联的其它部件或器械，例如拉线 ，注射针，外科器械等。 本文所述的导管包括注射型导管和/或引导型导管。

    System and method for magnetic-resonance-guided electrophysiologic and ablation procedures
    15.
    发明授权
    System and method for magnetic-resonance-guided electrophysiologic and ablation procedures 有权
    磁共振引导电生理和消融手术的系统和方法

    公开(公告)号：US08099151B2

    公开(公告)日：2012-01-17

    申请号：US11314241

    申请日：2005-12-22

    Applicant: Henry R Halperin ,  Ronald D. Berger ,  Ergin Atalar ,  Elliot R McVeigh ,  Albert Lardo ,  Hugh Calkins ,  Joao Lima

    Inventor： Henry R Halperin ,  Ronald D. Berger ,  Ergin Atalar ,  Elliot R McVeigh ,  Albert Lardo ,  Hugh Calkins ,  Joao Lima

    IPC: A61B5/05

    CPC classification number: A61B5/055 ,  A61B5/415 ,  A61B5/418 ,  A61B18/1492 ,  A61B90/36 ,  A61B2017/00039 ,  A61B2017/00053 ,  A61B2090/374 ,  G01R33/285 ,  G01R33/34084 ,  G01R33/4808 ,  G01R33/5601

    Abstract: A system and method for using magnetic resonance imaging to increase the accuracy of electrophysiologic procedures includes an invasive combined electrophysiology and imaging antenna catheter which includes an RF antenna for receiving magnetic resonance signals and diagnostic electrodes for receiving electrical potentials. The combined electrophysiology and imaging antenna catheter is used in combination with a magnetic resonance imaging scanner to guide and provide visualization during electrophysiologic diagnostic or therapeutic procedures, such as ablation of cardiac arrhythmias. The combined electrophysiology and imaging antenna catheter may further include an ablation tip, and be used as an intracardiac device to deliver energy to selected areas of tissue and visualize the resulting ablation lesions. The antenna utilized in the combined electrophysiology and imaging catheter for receiving MR signals is preferably of the coaxial or “loopless” type. High-resolution images from the antenna may be combined with low-resolution images from surface coils of the MR scanner to produce a composite image. A system for eliminating the pickup of RF energy in which intracardiac wires are detuned by filtering so that they become very inefficient antennas. An RF filtering system is provided for suppressing the MR imaging signal while not attenuating the RF ablative current. Steering means may be provided for steering the invasive catheter under MR guidance. Other ablative methods can be used such as laser, ultrasound, and low temperatures.

    Abstract translation: 使用磁共振成像来提高电生理过程精度的系统和方法包括侵入性组合电生理学和成像天线导管，其包括用于接收磁共振信号的RF天线和用于接收电位的诊断电极。 组合的电生理学和成像天线导管与磁共振成像扫描仪组合使用以在电生理诊断或治疗过程（例如心律失常消融）中引导和提供可视化。 组合的电生理学和成像天线导管还可以包括消融尖端，并且用作心内装置以将能量传递到组织的选定区域并且可视化所得到的消融损伤。 在组合的电生理学和成像导管中用于接收MR信号的天线优选地是同轴的或“无绒毛”的。 来自天线的高分辨率图像可以与来自MR扫描器的表面线圈的低分辨率图像组合以产生合成图像。 用于消除RF能量的拾取的系统，其中心内线通过滤波失谐，使得它们变得非常低效的天线。 提供RF滤波系统，用于抑制MR成像信号，同时不衰减RF消融电流。 可以提供转向装置用于在MR引导下转导侵入性导管。 可以使用其他烧蚀方法，如激光，超声和低温。

    Biopsy and sampling needle antennas for magnetic resonance imaging-guided biopsies
    16.
    发明授权
    Biopsy and sampling needle antennas for magnetic resonance imaging-guided biopsies 有权
    用于磁共振成像引导活检的活组织检查和采样针天线

    公开(公告)号：US07778682B2

    公开(公告)日：2010-08-17

    申请号：US11761561

    申请日：2007-06-12

    Applicant: Ananda Kumar ,  Ergin Atalar ,  Ogan Ocali

    Inventor： Ananda Kumar ,  Ergin Atalar ,  Ogan Ocali

    IPC: A61B5/055

    CPC classification number: G01R33/287 ,  A61B5/055 ,  A61B10/0275 ,  A61B34/20 ,  A61B2034/2051 ,  A61B2090/374 ,  A61B2090/3958 ,  G01R33/34084 ,  G01R33/341 ,  G01R33/3628 ,  G01R33/3657

    Abstract: Herein is disclosed a magnetic resonance imaging antenna, including an inner conductor, an outer shield slideably displaceable with respect to the inner conductor, and an insulator electrically insulating the inner conductor from the outer shield. Herein is disclosed a biopsy needle antenna, including a magnetic resonance imaging antenna, having an outer shield, and an inner conductor electrically insulated from the outer shield by a dielectric; and a biopsy needle electrically connected to the inner conductor and electrically insulated from the outer shield by the dielectric. Herein is disclosed a method of obtaining a sample with magnetic resonance imaging guidance, including providing a sampling needle magnetic resonance imaging antenna, advancing the antenna to a structure from which the sample is to be taken, detecting magnetic resonance data by the antenna, and coupling the sample to the antenna.

    Abstract translation: 这里公开了一种磁共振成像天线，其包括内部导体，可相对于内部导体可滑动地移位的外部屏蔽，以及将内部导体与外部屏蔽电绝缘的绝缘体。 本文公开了一种活检针状天线，包括具有外屏蔽的磁共振成像天线和通过电介质与外屏蔽电绝缘的内导体; 以及活组织检查针，其电连接到所述内部导体并且通过所述电介质与所述外部屏蔽层电绝缘。 本文公开了一种获得具有磁共振成像引导的样本的方法，包括提供采样针磁共振成像天线，将天线推进到要从其获取样本的结构，通过天线检测磁共振数据，以及耦合 样品到天线。

    Radiometric Approach to Temperature Monitoring Using a Magnetic Resonance Scanner
    18.
    发明申请
    Radiometric Approach to Temperature Monitoring Using a Magnetic Resonance Scanner 审中-公开
    使用磁共振扫描仪进行温度监测的辐射方法

    公开(公告)号：US20070293753A1

    公开(公告)日：2007-12-20

    申请号：US10585570

    申请日：2004-07-07

    Applicant: Abdel-Monem El-Sharkawy ,  Ergin Atalar

    Inventor： Abdel-Monem El-Sharkawy ,  Ergin Atalar

    IPC: A61B5/05

    CPC classification number: G01K11/006 ,  G01K13/002 ,  G01K2213/00 ,  G01R33/4804

    Abstract: Disclosed is a method and system for acquiring absolute temperature imagery using an MR scanner. The method involves using the RF coil as a passive antenna, and performing radiometric measurements of the noise variance of the target within the field of view of the RF coil. The noise variance corresponds to the absolute temperature of the volume within the field of view of the RF coil. The room of the MR scanner is used for electromagnetic shielding during the acquisition of radiometric data. This method may be performed with minimal or no add-ons to existing MR scanner hardware. Disclosed are a method for calibrating an MR scanner for radiometric temperature measurements, and a method for acquiring and generating thermal imagery with a calibrated MR scanner.

    Abstract translation: 公开了一种使用MR扫描器获取绝对温度图像的方法和系统。 该方法包括使用RF线圈作为无源天线，并对RF线圈视场内的目标的噪声方差进行辐射测量。 噪声变化对应于RF线圈视野内的体积的绝对温度。 MR扫描仪的房间在采集辐射数据时用于电磁屏蔽。 该方法可以对现有的MR扫描仪硬件进行最少或不附加。 公开了一种用于校准用于辐射温度测量的MR扫描仪的方法，以及用于使用校准的MR扫描器获取和产生热成像的方法。

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