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31. 发明授权

US11874350B2 Local coil with detuning function 有权
公开(公告)号：US11874350B2
公开(公告)日：2024-01-16
申请号：US17216588
申请日：2021-03-29
申请人： Siemens Healthcare GmbH
发明人： Robert Rehner , Helmut Greim
IPC分类号： G01R33/36 , G01R33/34
CPC分类号： G01R33/365 , G01R33/34084
摘要： A local coil includes a coil element in the form of a loop. The coil element includes a first conductor, a second conductor, and a third conductor. The coil element includes a first dielectric and a second dielectric. The first dielectric is arranged between the first conductor and the second conductor, and the second dielectric is arranged between the second conductor and the third conductor. The coil element includes a receive unit that includes the first conductor and the second conductor, and a detuning unit that includes the third conductor. In a first operating state of the coil element, the receive unit has a first resonant frequency. In a second operating state of the coil element, the detuning unit is configured to detune the resonant frequency of the receive unit so that the receive unit has a second resonant frequency different than the first resonant frequency.

32. 发明授权

US11867781B2 Method for evaluating a pilot tone signal in a magnetic resonance facility, magnetic resonance facility, computer program and electronically readable data medium 有权
公开(公告)号：US11867781B2
公开(公告)日：2024-01-09
申请号：US17152911
申请日：2021-01-20
申请人： Siemens Healthcare GmbH
发明人： Mario Bacher , Matthias Fenchel , Peter Speier
IPC分类号： G01R33/36 , G01R33/567 , G01R33/48 , G01R33/56 , G06F18/2133
CPC分类号： G01R33/36 , G01R33/4818 , G01R33/5602 , G01R33/567 , G01R33/5608 , G06F18/2133
摘要： A computer-implemented method is provided for evaluating a pilot tone signal. In the method, the pilot tone signal is recorded using a high-frequency coil arrangement of a magnetic resonance facility and describes a movement of a patient. The method also includes extracting movement information assigned to a movement component, (e.g., a respiratory movement). A breakdown or decomposition of the pilot tone signal is effected on a basis of signal components having assigned weightings and for the purpose of determining the movement information, a part of a base which is assigned to the movement component is selected by a selection criterion. For the purpose of determining the base and the weightings, a non-negative matrix factorization is performed, in the context of which a signal matrix, which is formed from the pilot tone signal and is in particular non-negative, is formulated as a product of a non-negative signal component matrix that describes the base and a non-negative weighting matrix that describes the weightings.

33. 发明公开

US20230358832A1 RADIO FREQUENCY COIL FOR MAGNETIC RESONANCE IMAGING 审中-公开
公开(公告)号：US20230358832A1
公开(公告)日：2023-11-09
申请号：US18353029
申请日：2023-07-14
申请人： Hyperfine Operations, Inc.
发明人： Eddy B. Boskamp , Michael Stephen Poole
IPC分类号： G01R33/34 , G01R33/44 , G01R33/36
CPC分类号： G01R33/34007 , G01R33/445 , G01R33/3628
摘要： A radio frequency (RF) coil apparatus is described herein for facilitating imaging of a patient positioned within a magnetic resonance imaging (MRI) system, the MRI system comprising a B0 magnet. The apparatus may comprise a frame comprising a first plate and a second plate disposed opposite the first plate; and an RF transmit coil comprising a plurality of conductors connected in series, the plurality of conductors being would around the frame and forming a plurality of turns. According to some aspects, there is provided an MRI system configured to image a patient positioned within the MRI system, the MRI system comprises a B0 magnet that produces a B0 magnetic field and the RF coil apparatus.

34. 发明授权

US11808829B2 Slotted waveguide array RF coil for magnetic resonance systems 有权
公开(公告)号：US11808829B2
公开(公告)日：2023-11-07
申请号：US17694907
申请日：2022-03-15
申请人： Colorado State University Research Foundation
发明人： Branislav Notaros , Milan Ilic
IPC分类号： G01R33/36 , G01R33/34 , G01R33/343 , G01R33/345 , A61B5/055 , G01R33/38 , G01R33/561
CPC分类号： G01R33/3678 , A61B5/055 , G01R33/343 , G01R33/345 , G01R33/34092 , G01R33/365 , G01R33/3808 , G01R33/5611
摘要： The exemplary system and method facilitate excitation of RF magnetic fields in ultra-high field (UHF) magnetic resonance (MRI) systems (e.g., MRI/NMR system) using a slotted waveguide array (SWGA) as an exciter coil. The exemplary exciter coil, in some embodiments, is configurable to provide RF magnetic field B1+ with high field-uniformity, with high efficiency, with excellent circular polarization, with negligible axial z-component, with arbitrary large field of view, and with exceptional possibilities for field-optimizations via RF shimming.

35. 发明授权

US11796614B2 Radio frequency (RF) antenna element with an optical back-end 有权
公开(公告)号：US11796614B2
公开(公告)日：2023-10-24
申请号：US17042368
申请日：2019-03-25
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Oliver Lips , Martinus Bernardus Van Der Mark
IPC分类号： G01R33/36 , H01Q7/00
CPC分类号： G01R33/3692 , G01R33/3621 , H01Q7/00
摘要： A radio frequency (RF) antenna arrangement comprising an RF antenna element and an optical back-end. The RF antenna element comprises an electrically conductive loop, an electronic pre-amplifier and a photo-electrical conversion element. The optical back-end comprising an optical power source and a photodetector. The RF antenna element and the optical back-end being optically coupled, and wherein the optical power source is optically coupled to the photo-electrical conversion element. The photo-electrical conversion element generates upon incidence of optical power from the optical power source an electrical power signal to the pre-amplifier. The photo-electrical conversion element generates optical data signals from electrical data signals picked-up by the electrically conductive loop. The photo-electrical conversion element applies the optical data signals to the photodetector.

36. 发明授权

US11795811B2 Method and system to improve open loop systems 有权
公开(公告)号：US11795811B2
公开(公告)日：2023-10-24
申请号：US16069989
申请日：2017-08-15
申请人： Halliburton Energy Services, Inc.
发明人： Jie Yang
IPC分类号： E21B47/085 , G01N24/08 , G01R33/36
CPC分类号： E21B47/085 , G01N24/081 , G01R33/3628
摘要： A method and system for transmitting an electromagnetic (EM) signal in a wellbore to improve an open loop system. The method comprises measuring a parameter indicative of a property of a transmitter using a sensor in the wellbore and generating an input signal for the transmitter based at least in part on the measured parameter to correct distortions exhibited by the output signal of the transmitter. The method comprises also comprises applying the input signal to the transmitter to transmit the EM signal corrected for distortions. The system comprises an antenna, a transmitter, a sensor, and a controller. The controller is configured and operable to generate an input signal for the transmitter based at least in part on the measured parameter to correct distortions exhibited by an output signal of the transmitter; and apply the input signal to the transmitter to transmit the EM signal corrected for the distortions.

37. 发明公开

US20230333179A1 MAGNETIC RESONANCE IMAGING SYSTEM WITH PROTECTION FROM OVERHEATING 审中-公开
公开(公告)号：US20230333179A1
公开(公告)日：2023-10-19
申请号：US17790771
申请日：2021-11-08
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Christoph Günther Leussler
IPC分类号： G01R33/28 , G01R33/34 , A61B5/055 , G01R33/36
CPC分类号： G01R33/288 , G01R33/34015 , A61B5/055 , G01R33/3692
摘要： A magnetic resonance imaging, MRI, system (2), comprises MRI electronics, including a transmitting coil (11) for transmitting radio frequency, RF, signals and a receiving coil (12) for receiving RF signals; and/or a transmitting/receiving coil (3) for transmitting and receiving RF signals; and cables (22), connecting the transmitting coil (11), receiving coil (12) and/or transmitting/receiving coil (3) to other electronic elements. The MRI system (2) further comprises an overheating detection unit to detect potential overheating of a patient's (1) tissue and/or a part of the MRI system (2) caused by at least one part of the MRI electronics; and a distance unit (16), wherein the distance unit (16) comprises a gas chamber (5), to be arranged between the at least one part of the MRI electronics and the patient (1) and/or between the at least one part of the MRI electronics and the part of the MRI system (2) and adapted to be filled with a gas such that a distance between the patient (1) and the part of the MRI electronics and/or between the part of the MRI system (2) and the part of the MRI electronics increases when the gas chamber (5) is filled with the gas, wherein the gas chamber (5) is in a deflated state when no significant overheating is detected, and an inflation unit (15) to fill the gas chamber (5) with the gas, wherein the overheating detection unit and the distance unit (16) are interconnected such that the inflation unit (15) fills the gas chamber (5) with the gas to increase the distance between the patient (1) and the part of the MRI electronics and/or between the part of the MRI system (2) and the part of the MRI electronics if the overheating detection unit detects significant overheating of the patients (1) tissue and/or the part of the MRI system (2).

38. 发明公开

US20230324479A1 RADIO FREQUENCY COIL TUNING METHODS AND APPARATUS 审中-公开
公开(公告)号：US20230324479A1
公开(公告)日：2023-10-12
申请号：US18334234
申请日：2023-06-13
申请人： Hyperfine Operations, Inc.
发明人： Todd Rearick , Jeremy Christopher Jordan , Gregory L. Charvat , Matthew Scot Rosen
IPC分类号： G01R33/36 , G01R33/44
CPC分类号： G01R33/3628 , G01R33/445
摘要： Some aspects comprise a tuning system configured to tune a radio frequency coil for use with a magnetic resonance imaging system comprising a tuning circuit including at least one tuning element configured to affect a frequency at which the radio frequency coil resonates, and a controller configured to set at least one value for the tuning element to cause the radio frequency coil to resonate at approximately a Larmor frequency of the magnetic resonance imaging system determined by the tuning system. Some aspects include a method of automatically tuning a radio frequency coil comprising determining information indicative of a Larmor frequency of the magnetic resonance imaging system, using a controller to automatically set at least one value of a tuning circuit to cause the radio frequency coil to resonate at approximately the Larmor frequency based on the determined information.

39. 发明公开

US20230280423A1 MAGNETIC FIELD GENERATION DEVICE AND MAGNETIC FIELD IRRADIATION METHOD 审中-公开
公开(公告)号：US20230280423A1
公开(公告)日：2023-09-07
申请号：US18005664
申请日：2021-06-02
申请人： National University Corporation Tokai National Higher Education and Research System
发明人： Kinji OHNO , Mikako ITO , Takuro TODA
IPC分类号： G01R33/36
CPC分类号： G01R33/3607
摘要： A problem is to provide a magnetic field generation device and magnetic field irradiation method that are useful to a living body. This magnetic field generation device includes a coil and a power source. The problem can be solved by the magnetic field generation device of which the power source can apply, to the coil, an electric current that is pulsed and that has frequency fluctuation, a maximum value of a generated magnetic field being 60 mG to 3000 mG.

40. 发明公开

US20230258750A1 MAGNETIC RESONANCE IMAGING SYSTEM AND METHOD USING FREQUENCY CALIBRATION BASED ON A SIGNAL FROM A GEO-SATELLITE POSITIONING SYSTEM 审中-公开
公开(公告)号：US20230258750A1
公开(公告)日：2023-08-17
申请号：US18014563
申请日：2021-06-22
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Tim Nielsen , Christoph Günther Leussler , Peter Vernickel , Oliver Lips
IPC分类号： G01R33/36 , G01R33/58
CPC分类号： G01R33/3692 , G01R33/583 , G01R33/3607
摘要： A method of setting an RF operating frequency of an MRI system (1) uses a first reference frequency signal, obtained from a geo-satellite positioning system, as a stable long term frequency reference. A second frequency source (24) is calibrated using the first frequency reference signal and the second frequency reference source (24) is then used as the master clock for the MRI system (1), for setting the RF operating frequency.

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