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    • 5. 发明申请
    • ACTIVE ADAPTIVE DETUNING SYSTEMS AND METHODS FOR INTERVENTIONAL DEVICES
    • 主动自适应解调系统和传统设备的方法
    • US20130172729A1
    • 2013-07-04
    • US13805454
    • 2011-07-01
    • Ozgur Kocaturk
    • Ozgur Kocaturk
    • A61B5/055
    • A61B5/055G01R33/285G01R33/34084G01R33/3657
    • Active MRI compatible interventional devices, such as catheters, include at least one RF antenna so that they are visible under MRI analysis. However, metallic structures within intravascular devices may heat up significantly during interventional MRI procedures due to eddy current formation over the conductive transmission lines. The electrical field coupling that occurs between interventional devices and RF signals depend on the position and orientation of interventional device within the bore and the insertion length of the interventional device. The system detects an induced current signal during RF transmission phase and selectively adjusts the impedance value associated with the interventional device by using a varactor and integrated circuit components in such a manner that the currents induced in the interventional device are below a threshold current level, thereby controlling current levels and heating in the interventional device.
    • 主动MRI兼容的介入装置,例如导管,包括至少一个RF天线,使得它们在MRI分析下是可见的。 然而,由于导电传输线上的涡流形成,介入MRI程序期间血管内装置内的金属结构可能会显着升温。 在介入装置和RF信号之间发生的电场耦合取决于介入装置在孔内的位置和取向以及介入装置的插入长度。 该系统在射频发射阶段检测感应电流信号,并通过使用变容二极管和集成电路组件以使得在介入装置中感应的电流低于阈值电流水平的方式选择性地调节与介入装置相关联的阻抗值,由此 控制介入装置中的电流水平和加热。
    • 7. 发明授权
    • Active adaptive detuning systems and methods for interventional devices
    • 主动自适应失谐系统和介入装置的方法
    • US09486158B2
    • 2016-11-08
    • US13805454
    • 2011-07-01
    • Ozgur Kocaturk
    • Ozgur Kocaturk
    • A61B5/055G01R33/36G01R33/28G01R33/34
    • A61B5/055G01R33/285G01R33/34084G01R33/3657
    • Active MRI compatible interventional devices, such as catheters, include at least one RF antenna so that they are visible under MRI analysis. However, metallic structures within intravascular devices may heat up significantly during interventional MRI procedures due to eddy current formation over the conductive transmission lines. The electrical field coupling that occurs between interventional devices and RF signals depend on the position and orientation of interventional device within the bore and the insertion length of the interventional device. The system detects an induced current signal during RF transmission phase and selectively adjusts the impedance value associated with the interventional device by using a varactor and integrated circuit components in such a manner that the currents induced in the interventional device are below a threshold current level, thereby controlling current levels and heating in the interventional device.
    • 主动MRI兼容的介入装置,例如导管,包括至少一个RF天线,使得它们在MRI分析下是可见的。 然而,由于导电传输线上的涡流形成,介入MRI程序期间血管内装置内的金属结构可能会显着升温。 在介入装置和RF信号之间发生的电场耦合取决于介入装置在孔内的位置和取向以及介入装置的插入长度。 该系统在射频发射阶段检测感应电流信号,并通过使用变容二极管和集成电路组件以使得在介入装置中感应的电流低于阈值电流水平的方式选择性地调节与介入装置相关联的阻抗值,由此 控制介入装置中的电流水平和加热。
    • 8. 发明授权
    • MRI guidewire
    • MRI导丝
    • US08478381B2
    • 2013-07-02
    • US12810481
    • 2008-12-31
    • Ozgur Kocaturk
    • Ozgur Kocaturk
    • A61B5/055
    • A61M25/09A61B5/055A61M2205/3515G01R33/287G01R33/34084
    • A guidewire (100) for use with interventional magnetic resonance imaging has a guidewire body (102) having a distal end and a proximal end and reserving a space therein, a dipole antenna (108) disposed in the space reserved within the guidewire body, the dipole antenna being adapted to be electrically connected to a signal processing system through a first signal channel (110) through the proximal end of the guidewire body, and a loop antenna (112) disposed in the space reserved within the guidewire body toward the distal end of the guidewire body, the loop antenna (112) being adapted to be electrically connected to the signal processing system through a second signal channel (114) through the proximal end of the guidewire body. The dipole antenna and the loop antenna are each constructed to receive magnetic resonance imaging signals independently of each other and to transmit received signals through the first and second signal channels, respectively, to be received by the signal processing system. An interventional magnetic resonance imaging system includes an active guidewire.
    • 用于介入磁共振成像的导丝(100)具有导线主体(102),其具有远端和近端并在其中保留空间;设置在保持在导丝主体内的空间中的偶极天线(108), 偶极天线适于通过穿过导线主体的近端的第一信号通道(110)电连接到信号处理系统;以及环形天线(112),其设置在保持在导丝主体内的空间中朝向远端 所述环形天线(112)适于通过穿过所述导丝主体的近端的第二信号通道(114)与所述信号处理系统电连接。 偶极天线和环形天线各自被构造成彼此独立地接收磁共振成像信号,并且分别通过第一和第二信号信道发送接收信号以由信号处理系统接收。 介入磁共振成像系统包括主动导丝。
    • 9. 发明申请
    • MRI GUIDEWIRE
    • MRI指南
    • US20100280359A1
    • 2010-11-04
    • US12810481
    • 2008-12-31
    • Ozgur Kocaturk
    • Ozgur Kocaturk
    • A61B5/055A61M25/09
    • A61M25/09A61B5/055A61M2205/3515G01R33/287G01R33/34084
    • A guidewire (100) for use with interventional magnetic resonance imaging has a guidewire body (102) having a distal end and a proximal end and reserving a space therein, a dipole antenna (108) disposed in the space reserved within the guidewire body, the dipole antenna being adapted to be electrically connected to a signal processing system through a first signal channel (110) through the proximal end of the guidewire body, and a loop antenna (112) disposed in the space reserved within the guidewire body toward the distal end of the guidewire body, the loop antenna (112) being adapted to be electrically connected to the signal processing system through a second signal channel (114) through the proximal end of the guidewire body. The dipole antenna and the loop antenna are each constructed to receive magnetic resonance imaging signals independently of each other and to transmit received signals through the first and second signal channels, respectively, to be received by the signal processing system. An interventional magnetic resonance imaging system includes an active guidewire.
    • 用于介入磁共振成像的导丝(100)具有导线主体(102),其具有远端和近端并在其中保留空间;设置在保持在导丝主体内的空间中的偶极天线(108), 偶极天线适于通过穿过导线主体的近端的第一信号通道(110)电连接到信号处理系统;以及环形天线(112),其设置在保持在导丝主体内的空间中朝向远端 所述环形天线(112)适于通过穿过所述导丝主体的近端的第二信号通道(114)与所述信号处理系统电连接。 偶极天线和环形天线各自被构造成彼此独立地接收磁共振成像信号,并且分别通过第一和第二信号信道发送接收信号以由信号处理系统接收。 介入磁共振成像系统包括主动导丝。