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公开(公告)号：US11419516B2
公开(公告)日：2022-08-23
申请号：US16551011
申请日：2019-08-26
IPC分类号： A61B5/05 , A61B5/055 , A61B5/11 , A61B5/113 , G01R33/341 , G01R33/567 , G01R33/36
摘要： A table for an MRI system includes a top surface for supporting a patient being imaged and a motion sensor for sensing motion of the patient. The motion sensor is located below the top surface and includes a self-resonant spiral (SRS) coil and a coupling loop. The coupling loop generates a drive RF signal to excite the SRS coil to radiate a magnetic field having a predefined resonant frequency. The coupling loop also receives a reflection RF signal from the SRS coil. The motion sensor is located such that at least a portion of a torso of the patient being imaged is within the magnetic field. A controller is configured to detect patient motion based on the reflection RF signal.
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公开(公告)号：US11327129B2
公开(公告)日：2022-05-10
申请号：US16854060
申请日：2020-04-21
发明人： Takafumi Ohishi , Sadanori Tomiha
IPC分类号： G01R33/341 , A61B5/055 , G01R33/36
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：US11280858B2
公开(公告)日：2022-03-22
申请号：US16463575
申请日：2017-11-22
发明人： Robert Steven Stormont , Scott Allen Lindsay , Victor Taracila , Ghazi Mustafa , Nabeel M. Malik , Fraser John Laing Robb , Dashen Chu
IPC分类号： G01R33/341 , A61B5/055 , G01R33/36 , G01R33/54 , G01R33/3415
摘要： Various methods and systems are provided for a flexible, lightweight, and low-cost radio frequency (RF) coil of a magnetic resonance imaging (MRI) system. In one example, a RF coil assembly for an MRI system includes a distributed capacitance loop portion comprising two parallel conductor wires encapsulated and separated by a dielectric material, the two parallel conductor wires maintained separate by the dielectric material along an entire length of the loop portion between terminating ends thereof, a coupling electronics portion including a pre-amplifier, and a coil-interfacing cable extending between the coupling electronics portion and an interfacing connector of the RF coil assembly.
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公开(公告)号：US20210353962A1
公开(公告)日：2021-11-18
申请号：US16322671
申请日：2017-08-07
IPC分类号： A61N5/10 , A61B5/055 , G01R33/341 , G01R33/48
摘要： It is an object of the invention to address the above mentioned issues related to image quality and patient positioning. This object is achieved by a mock-up antenna configured to be used during radiation treatment delivery, wherein the radiation treatment is delivered based on a radiation treatment plan and wherein the radiation treatment plan is at least partly based on a planning magnetic resonance image. The mock-up antenna is substantially transparent to radiation and comprises connection means configured to allow a connection between the mock up antenna and a fixation means, which fixation means is configured to fixate a position of the mock-up antenna during radiation treatment and. The mock-up antenna further comprises an inner surface configured to be positioned towards a patient in a way such that is affects a position and/or orientation of the patient during radiation treatment delivery, wherein the inner surface has a shape substantially similar to a shape of a working magnetic resonance imaging antenna used during an acquisition of the planning magnetic resonance image.
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公开(公告)号：US20210311144A1
公开(公告)日：2021-10-07
申请号：US17174773
申请日：2021-02-12
IPC分类号： G01R33/36 , G01R33/483 , G01R33/54 , G01R33/341 , G01R33/48 , G01R33/44
摘要： A magnetic resonance (MR) imaging system includes a transmit radio frequency (RF) coil assembly comprising multiple capacitor banks each coupled to at least one diode that is characterized by a high breakdown voltage such that when the transmit RF coil assembly applies at least one slice-selecting RF pulse to a portion of a subject placed in the magnet to select a particular slice for MR imaging, the capacitor banks are selectively adjusted to improve an RF transmission characteristics of the RF coil assembly in transmitting the at least one slice-selecting RF pulse. The MR imaging system may further include a receive radio frequency (RF) coil assembly configured to, in response to at least the slice-selecting RF pulse, receive at least one response radio frequency (RF) pulse emitted from the selected slice of the portion of the subject; a housing; a main magnet; gradient coils; and a control unit.
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公开(公告)号：US11105868B2
公开(公告)日：2021-08-31
申请号：US16797803
申请日：2020-02-21
申请人： NOKOMIS, INC.
发明人： Walter J Keller, III , Adam Taylor Brant , Andrew Richard Portune , James Robert Uplinger, II , Todd Eric Chornenky
IPC分类号： G01R33/34 , H01F41/00 , H01F41/079 , G01R33/341
摘要： A device to extract digital and unintended analog signals from a data bus with a non-contact common mode probe and a differential mode probe, each with a low noise amplifier. The analog and digital signals can be monitored contemporaneously.
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公开(公告)号：US10852374B2
公开(公告)日：2020-12-01
申请号：US15779868
申请日：2016-11-28
IPC分类号： G01R33/36 , H04B5/00 , H04B7/06 , G01R33/341
摘要： A magnetic resonance (MR) system, including at least one wireless radio-frequency (RF) coil comprising antennas for receiving induced MR signals and an antenna array comprising transmission and reception antennas; a base transmitter system (BTS) having an antenna array comprising a plurality of transmission and reception antennas configured to communicate with the RF coil using a selected spatial diversity (SD) method; and at least one controller to control the BTS and the RF coil to determine a number of transmission and/or reception antennas available, couple the transmission and reception antennas to form corresponding antenna pairings, and determine signal characteristic information (SCI) of the antenna pairings, select an SD transmission method based upon the determined number of antennas and the determined SCI for communication between the BTS and the RF coil, and establish a communication channel between the BTS and the RF coil in accordance with the selected SD transmission method.
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公开(公告)号：US20200284861A1
公开(公告)日：2020-09-10
申请号：US16753096
申请日：2018-10-05
发明人： Ravi Srinivasan
IPC分类号： G01R33/34 , G01R33/341 , G01R33/28
摘要： A pediatric magnetic resonance imaging (MRI) system is provided. The pediatric MRI system includes a radio frequency (RF) coil configured to image a portion of a patient. The pediatric MRI system also includes a cryo-cooling mechanism operatively coupled to the RF coil. The cryo-cooling mechanism is configured to maintain a temperature of the RF coil within a prescribed temperature range.
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公开(公告)号：US10753992B2
公开(公告)日：2020-08-25
申请号：US15772250
申请日：2016-10-28
IPC分类号： G01R33/36 , G01R33/54 , G01R33/341
摘要： A magnetic resonance (MR) system includes a main magnet having a bore and producing a substantially homogenous magnetic field (B0) within a scanning volume. A mobile radio-frequency (RF) coil (MRF) includes at least one transmit antenna for transmitting a location signal within the bore of the magnet. At least one receive antenna os situated substantially at a known location and configured to receive the transmitted location signal. A controller is configured to align the transmit antenna of the MRF with reference to the known location of the receive antenna based upon an analysis of the received location signal.
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公开(公告)号：US10732244B2
公开(公告)日：2020-08-04
申请号：US13429928
申请日：2012-03-26
申请人： Volker Rasche , Erich Hell , Johannes Ulrici
发明人： Volker Rasche , Erich Hell , Johannes Ulrici
IPC分类号： G01R33/54 , G01R33/341 , A61B5/055 , A61B5/00 , G01R33/28 , G01R33/561
摘要： A method for operating an imaging system, and a system, apparatus, and computer-readable medium, that operate in accordance with the method. The method includes providing field-of-view (FoV) information, and automatically selecting at least one recording sequence based on at least one of a particular diagnostic application of interest and the FoV information.
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