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121.发明授权公开(公告)号：US11543475B2
公开(公告)日：2023-01-03
申请号：US16859771
申请日：2020-04-27
发明人： Myung Kyun Woo , Gregor Adriany , Kamil Ugurbil , Russell L. Lagore , Lance DelaBarre , Jerahmie Radder
IPC分类号： G01R33/28 , H01Q7/00 , G01R33/341 , H01Q1/36 , H01Q21/29
摘要： An antenna apparatus for a radio frequency (RF) coil to transmit signals to and to receive signal from a subject in a magnetic resonance imaging (MRI) system includes a distal surface facing away from the subject, a proximal surface facing towards the subject, a high permittivity material (HPM) having a shape, and an antenna coupled to the HPM and positioned on the proximal surface such that the antenna is positioned between the HPM and the subject.
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公开(公告)号：US20220203139A1
公开(公告)日：2022-06-30
申请号：US17613168
申请日：2020-06-05
申请人： Boaz SHAPIRA
发明人： Boaz SHAPIRA
IPC分类号： A61N7/02 , G01R33/48 , G01R33/341 , A61B90/00
摘要： Ultrasound transducers adjust the B1+ and/or B1− field distribution in an MRI apparatus to improve the signal sensitivity and homogeneity at a region of interest. Approaches employed include strategic placement of field-altering features such as slots and/or dipoles along the exterior surface or, in some cases, the interior of the transducer. In various embodiments, the field-altering features are (or behave as) passive resonators.
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公开(公告)号：US11009574B2
公开(公告)日：2021-05-18
申请号：US16510613
申请日：2019-07-12
IPC分类号： G01V3/00 , G01R33/36 , G01R33/341
摘要： A coil array component including an element assembly that includes a filler and a resin material, a first coil portion and a second coil portion that are embedded in the element assembly and that are composed of a first coil conductor and a second coil conductor, respectively, and four outer electrodes electrically connected to the first coil portion and the second coil portion. Also, four extension electrodes that extend from end surfaces of the element assembly to the bottom surface and are electrically connected to the outer electrodes on the bottom surface are further included. In addition, the extension electrodes are covered with insulating layers on end surfaces of the element assembly.
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124.发明授权公开(公告)号：US10976390B2
公开(公告)日：2021-04-13
申请号：US16435706
申请日：2019-06-10
发明人： Stefan Popescu
IPC分类号： G01R33/36 , G01R33/341
摘要： Embodiments relate to a sensor for use in a magnetic resonance tomography unit and to a system including of a magnetic resonance tomography unit and a sensor. The sensor includes an energy supply device, a data transmission device and a first resonant antenna. The first resonant antenna includes a signal connection to the data transmission device and/or the energy supply device. A significant mismatch of the first resonant antenna exists between the impedance of the signal connection and the impedance of the first resonant antenna in free space at a first resonant frequency.
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公开(公告)号：US10830844B2
公开(公告)日：2020-11-10
申请号：US15566279
申请日：2016-04-18
申请人： Cornell University
IPC分类号： G01R33/30 , G01R33/28 , G01R33/465 , G01R33/56 , G01N24/08 , G01N1/31 , G01R33/483 , G01R33/341
摘要： The present disclosure discusses systems and methods for imaging tissue. The system can reduce the amount of vibrations that are transmitted from a magnetic resonance imaging device to a tissue sample. The system can include a stabilization platform with at least one vibration dampener coupled towards either end of the stabilization platform. A fluid reservoir is coupled to the stabilization platform and a resonator is coupled to the exterior of the fluid reservoir.
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公开(公告)号：US20200341083A1
公开(公告)日：2020-10-29
申请号：US16854060
申请日：2020-04-21
发明人： Takafumi Ohishi , Sadanori Tomiha
IPC分类号： G01R33/341 , G01R33/36 , A61B5/055
摘要： In one embodiment, an MRI apparatus includes: an RF coil configured to receive a magnetic resonance signal from an object and include a first wireless antenna with horizontal polarization; a main body provided with a bore and configured to apply an RF pulse to an object, the bore being a space in which the object is placed during imaging; and at least one second wireless antenna configured to perform wireless communication between the RF coil and the main body via the first wireless antenna, one of the at least one second wireless antenna being disposed at an uppermost portion in an outer periphery of an opening edge of the bore.
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公开(公告)号：US10718843B2
公开(公告)日：2020-07-21
申请号：US16293118
申请日：2019-03-05
发明人： Jürgen Nistler
IPC分类号： G01R33/565 , G01R33/341 , G01R33/58
摘要： A device and a method for detecting a spike during a magnetic resonance scan are provided. The device has a first receiver with a first signal connection for connecting a local coil and a second receiver with a second signal connection for connecting a reference antenna. The device is configured to compare a first signal received by the first receiver via the first signal connection with a second signal received by the second receiver via the second signal connection and, in the event of a predetermined deviation, to emit a warning signal.
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公开(公告)号：US10690737B2
公开(公告)日：2020-06-23
申请号：US16218609
申请日：2018-12-13
发明人： Xiaoyu Yang , Tsinghua Zheng , Haoqin Zhu
IPC分类号： G01R33/36 , G01R33/341 , G01R33/34 , G01R33/3415
摘要： Embodiments relate to magnetic resonance imaging (MRI) radio frequency (RF) coil arrays having reduced coupling via hidden transmission lines. One example embodiment comprises a MRI RF coil array comprising: a first RF coil element coupled to a first output transmission cable (e.g., coaxial) that is configured to carry a first signal that is associated with the first RF coil element; a second RF coil element coupled to a second output transmission cable that is configured to carry a second signal that is associated with the second RF coil element, wherein the second RF coil element comprises a first portion of the first output transmission cable; and a first balun configured to reduce coupling associated with the first signal, wherein the first balun is arranged between the first RF coil element and the second RF coil element. Additional coil elements can be similarly combined in embodiments.
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公开(公告)号：US20200158799A1
公开(公告)日：2020-05-21
申请号：US16626714
申请日：2018-06-27
IPC分类号： G01R33/34 , G01R33/341
摘要： Aspects of photonic band gap resonators for magnetic resonance are described. In one example, an apparatus includes a 1D structure having a plurality of layers. A respective thickness of the individual layers is one-quarter of a respective wavelength of a target magnetic resonance frequency within the individual layers of the plurality of layers, or a multiple thereof. A first layer has a first dielectric constant, and a second layer that is adjacent to the first layer has a second dielectric constant. A defect includes a sample. The defect has a thickness that is approximately up to one-half of a wavelength of the target magnetic resonance frequency within the defect.
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公开(公告)号：US20200081080A1
公开(公告)日：2020-03-12
申请号：US16129601
申请日：2018-09-12
IPC分类号： G01R33/34 , G01R33/341 , G01R33/385 , G01R33/36
摘要： Various methods and systems are provided for a flexible, lightweight, and low-cost radio frequency (RF) coil of a magnetic resonance imaging (MM) system with reduced power dissipation during decoupling. In one example, the RF coil includes a loop portion with distributed capacitance which comprises two conductor wires encapsulated and separated by a dielectric material and a feed board including a decoupling circuit configured to decouple the distributed capacitance of the loop portion during a transmit operation, an impedance inverter circuit, and a pre-amplifier.
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