-
11.发明授权公开(公告)号：US10932216B2
公开(公告)日：2021-02-23
申请号：US16061723
申请日：2016-12-12
摘要： A magnetic resonance imaging (MRI) system (100, 400, 500) includes a wireless RF station (20, 320, 420, 520, 620) which is associated with one or more RF coils which sense the magnetic resonance (MR) signal emitted from a subject under MRI examination. The wireless RF station communicates digital data representing the sensed MR signal to an MRI controller (124) for further processing, which may include display. An internal clock (2202, 3202) in the wireless RF station is precisely synchronized with the MRI controller clock (108, 2101, 3101), with carrier phase synchronization and code phase tracking of a predefined code sequence such as a pseudo random number (PRN) sequence.
-
公开(公告)号：US10215818B2
公开(公告)日：2019-02-26
申请号：US14785959
申请日：2014-04-08
IPC分类号： G01R33/36 , G01R33/58 , G01R33/3415
摘要： A magnetic resonance (MR) coil array (26, 28) connected by way of a single transmission line (46, 48) is provided. The MR coil array (26, 28) includes a coil element (34) and a corresponding coil element circuit (32). The coil element circuit (32) includes at least one active component (40) powered by a power signal carried on the coaxial transmission line (46, 48). The voltage of the power signal varies between first and second direct current (DC) voltages of the same polarity. The coil element circuit (32) further includes a tune/detune circuit (42) connected to the coaxial transmission line (46, 48). The tune/detune circuit (42) tunes or detunes the coil element (34) based on the first and second DC voltages. An MR system (10) using the MR coil array (26, 28) and a method (10) for tuning or detuning the MR coil (26, 28) are also provided. Accordingly, a single coaxial cable between the MR system and the coil element is sufficient for conveying MR data, a power signal for the preamplifier and a detuning signal. Moreover, the preamplifier can be powered irrespective of the coil element being in the tuned or in the detuned state.
-
13.发明申请MAGNETIC RESONANCE THERMOGRAPHY: HIGH RESOLUTION IMAGING FOR THERMAL ABNORMALITIES 有权磁共振热像仪：用于热异常的高分辨率成像公开(公告)号：US20140309519A1
公开(公告)日：2014-10-16
申请号：US14368306
申请日：2012-12-13
CPC分类号： A61B5/01 , A61B5/015 , A61B5/055 , A61B5/7275 , A61B5/7282 , A61B5/742 , A61N5/1048 , A61N7/02 , G01R33/4804 , G01R33/4808 , G06F19/00
摘要： A magnetic resonance scanner (12) is configured for themographic imagin. One or more processors (28) receive (56) thermal image data from the magnetic resonance scanner and reconstruct at least one thermal image in which each voxel includes a measure of temperature change. The one or more processors identify (58) thermally abnormal voxels. A display (44) displays at least one reconstructed image with the identified abnormal thermal locations.
摘要翻译： 磁共振扫描器（12）被配置用于人造想象。 一个或多个处理器（28）从磁共振扫描器接收（56）热图像数据，并重构至少一个热图像，其中每个体素包括温度变化的测量。 一个或多个处理器识别（58）热异常体素。 显示器（44）显示具有所识别的异常热位置的至少一个重建图像。
-
公开(公告)号：US10247793B2
公开(公告)日：2019-04-02
申请号：US15129429
申请日：2015-03-18
IPC分类号： G01R33/28 , G01R33/36 , G01R33/3415
摘要： A radio-frequency (RF) coil assembly (120, 660) for acquiring magnetic resonance (MR) signals. The RF coil assembly may include one or more of: at least one radio-frequency (RF) receive coil (246-x) for acquiring the MR signals; a detune circuit (248-x) including one or more circuit arms (A, B) serially coupled to the at least one RF receive coil, each of one or more circuit arms having at least two low-loss switches (350, 352, 450, 452, 462, 466) serially coupled to each other; a charge control circuit (372, 472) coupled to each of the one or more circuit arms at a location that is between the at least two serially-coupled low-loss switches of each of the one of more circuit arms and configured to draw power from the RF receive coil during a detune state; and an energy storage device (252, 370, 470) coupled to the charge control circuit and configured to store the drawn power.
-
公开(公告)号：US09869732B2
公开(公告)日：2018-01-16
申请号：US14653881
申请日：2013-09-24
发明人： Arne Reykowski
IPC分类号： G01R33/36 , G01R33/34 , G01R33/3415
CPC分类号： G01R33/365 , G01R33/34092 , G01R33/3415 , G01R33/3614
摘要： The invention discloses a decoupling circuit (32) disposed between adjacent RF receive coil elements to automatically decouple the adjacent MRI RF receive coil elements. In one embodiment, the invention involves to inject an RF signal into a first coil element, to measure the RF signal coupled from the first coil element into a second coil element and to adjust the capacitance of the decoupling circuit such as to minimize the coupling between the first and the second coil elements.
-
公开(公告)号：US20150204954A1
公开(公告)日：2015-07-23
申请号：US14421080
申请日：2013-08-02
发明人： Arne Reykowski
CPC分类号： G01R33/3614 , G01R33/34092 , H03F7/04
摘要： The exemplary embodiments are related to systems and methods for a mode balanced parametric amplifier. Exemplary embodiments relate to a balanced parametric circuit including a first resonant structure including a first plurality of varactor diodes and a second resonant structure including a second plurality of varactor diodes. The first and second resonant structures are coupled to fom a coupled structure having at least two orthogonal resonant modes, where a first resonant mode is resonant at a first frequency of an input signal and a second resonant mode is resonant at a second frequency of a pump signal. Further, the pump signal is used to one of amplify the first signal at the first frequency or mix and amplify the first signal to a frequency higher than the first frequency.
摘要翻译： 示例性实施例涉及用于模式平衡参量放大器的系统和方法。 示例性实施例涉及包括包括第一多个变容二极管的第一谐振结构和包括第二多个变容二极管的第二谐振结构的平衡参量电路。 第一和第二谐振结构耦合到具有至少两个正交谐振模式的耦合结构，其中第一谐振模式在输入信号的第一频率处谐振，并且第二谐振模在谐振模式在泵的第二频率处谐振 信号。 此外，泵浦信号用于以第一频率放大第一信号，或者将第一信号混合并放大到高于第一频率的频率。
-
公开(公告)号：US11275134B2
公开(公告)日：2022-03-15
申请号：US16335860
申请日：2017-09-29
摘要： In MRI system, acquired MR signals that will have a greater impact on the quality of the final reconstructed MRI image if a data link error occurs are encoded with a higher, or more robust, level of encoding prior to being transmitted over a data communications link. Conversely, acquired MR signals that will have a lesser impact on the quality of the final reconstructed MRI image if a data link error occurs are encoded with a lower, or less robust, level of encoding prior to being transmitted over the data communications link. The overall result is improved data link robustness and efficiency for data being sent over the data link.
-
公开(公告)号：US11209508B2
公开(公告)日：2021-12-28
申请号：US16973821
申请日：2019-06-11
IPC分类号： G01R33/36
摘要： A radio frequency (RF) device for receiving or exciting a magnetic resonance (MR) signal includes an MR coil (22, 32) tuned to an MR frequency band, a digital signal processing chain (40, 44, 58, 70) at least partly tuned to operate at baseband, an analog signal processing chain (48, 50, 54, 60) operatively connected with the MR coil and at least partly tuned to operate at the MR frequency band, and an analog to digital (A/D) or digital-to-analog (D/A) converter (46, 56) connecting the digital signal processing chain and the analog signal processing chain. The analog signal processing chain includes an analog dispersive delay line (50, 60) tuned to impose a frequency-dependent signal delay (52, 62) that is monotonically increasing or monotonically decreasing over the MR frequency band. In more specific embodiments, the RF device may comprise an MR transmit chain (20), or an MR receive chain (30).
-
公开(公告)号：US11119167B2
公开(公告)日：2021-09-14
申请号：US16760506
申请日：2018-10-24
IPC分类号： G01R33/36
摘要： A magnetic resonance imaging system (100, 200, 300, 400) includes a wireless communication station (600) which: receives via a receive antenna element (630) at least one first clock signal among two or more first clock signals which are synchronized with a first clock (510); transmits two or more second clock signals from two or more transmit antenna elements (620-1) of a phased array antenna (620); transmits data representing a sensed magnetic resonance signal from at least two of the transmit antenna elements; outputs a clock synchronization signal in response to the received first clock signal(s); and synchronizes a second clock (610) to the first clock signal in response to the clock synchronization signal. The first clock signals are transmitted by a phased array antenna (520) of another wireless communication station (500). Phase and signal diversity transmission allows the first and second wireless communication stations to maintain clock synchronization in case of a loss of a line of sight path between the stations.
-
公开(公告)号：US10302716B2
公开(公告)日：2019-05-28
申请号：US15510327
申请日：2015-09-16
发明人： Arne Reykowski
IPC分类号： G01R33/36 , G01R33/56 , G01R33/567
摘要： A system and method synchronizes a digitizer clock of a Magnetic Resonance Imaging (MRI) device with a system clock of an imaging device. In a first method, an original reference signal is split into first and second reference signals in which the second reference signal is phase shifted to generate an orthogonal reference signal. A reliability of image data may be determined based upon a product between the first reference signal and the orthogonal reference signal. In a second method, a reference signal is transmitted from the imaging device to the MRI device and a return signal is received from the MRI device to the imaging device. A discrepancy between the digitizer clock and the system clock may be determined based upon the return signal which includes a variable time delay.
-
-
-
-
-
-
-
-
-
搜索结果
22 条记录 (耗时 0.015 秒)