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公开(公告)号：US10725130B2
公开(公告)日：2020-07-28
申请号：US15776571
申请日：2016-09-28
发明人： Lilong Li , Songhua Chen , Arcady Reiderman
IPC分类号： G01R31/00 , G01R33/38 , G01V3/32 , G01R33/3415 , G01R33/383 , G01R33/341
摘要： Nuclear magnetic resonance (NMR) method, system, and sensing device for downhole measurements. The NMR device for characterizing a subterranean zone includes a tool body, a magnetic element, and a radio frequency coil. The tool body includes an uphole end and a downhole end, where a longitudinal axis extends through the uphole end and downhole end. The magnetic element is located within the tool body and generates a static magnetic field (B0) in a longitudinal direction at a region of the subterranean zone. The radio frequency coil is located within the tool body and generates a radio frequency magnetic field (B1). The magnetic element and the radio frequency coil enable a side-looking NMR mode.
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12.发明授权公开(公告)号：US10473738B2
公开(公告)日：2019-11-12
申请号：US15562049
申请日：2016-03-24
IPC分类号： G01R33/36 , G01R33/565 , G01R33/58 , G01R33/341 , G01R33/48 , G01R33/561
摘要： A system for controlling a wireless-type radio frequency (RF) coil apparatus (102, 202, 302, 500) for a magnetic resonance (MR) system including a processor for acquiring emitted radio frequency (RF) signals from a plurality of coils of an RF transducer array including an indication of a local clock signal indicating a time of (RF) signal acquisition; acquiring magnetic field strength information from a plurality of field probes of a magnetic field probe array including an indication of the local clock signal indicating a time of magnetic field strength information acquisition, and forming k-space information based upon the acquired emitted RF signals from the plurality of coils of the RF transducer array and the acquired magnetic field strength information including the indications of the local clock signal.
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13.发明授权公开(公告)号：US10473734B2
公开(公告)日：2019-11-12
申请号：US15533397
申请日：2015-12-04
IPC分类号： G01R33/28 , G01R33/341 , G01R33/36 , G01R33/24
摘要： The present invention provides a radio frequency (RF) receive coil device (110) for use in a magnetic resonance (MR) imaging system (100), comprising a RF receive coil (114), a plug (112) for connecting the RF receive coil (114) to the MR imaging system (100), sensing means (118) for sensing the presence of a magnetic field of the MR imaging system (100), detecting means (119) for detecting if the plug (112) is connected to the MR imaging system (100), and a warning means (120, 122) for generating a warning when the sensing means (118) sense the presence of a magnetic field of the MR imaging system (100) and the detecting means (119) detect that the plug (112) is not connected to the MR imaging system (100).
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公开(公告)号：US10422915B2
公开(公告)日：2019-09-24
申请号：US15524955
申请日：2015-12-29
IPC分类号： G01V3/32 , G01V3/14 , G01N24/08 , G01R33/341 , G01R33/38 , G01R33/3873
摘要： Nuclear magnetic resonance apparatuses and systems are described. In an example, the apparatus comprises a tool housing and a magnet assembly disposed within the tool housing to produce a magnetic field in a volume in a geological formation. An external housing containing an antenna assembly is coupled to the tool housing.
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公开(公告)号：US20190277933A1
公开(公告)日：2019-09-12
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：US10379180B2
公开(公告)日：2019-08-13
申请号：US14539782
申请日：2014-11-12
IPC分类号： G01V3/00 , G01R33/341 , G01R33/3415
摘要： The transmission antenna apparatus is configured for emitting transmission magnetic fields in magnetic resonance imaging devices and includes one or more flat antennas. A magnetic resonance imaging device includes such a transmission antenna apparatus.
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公开(公告)号：US10359484B2
公开(公告)日：2019-07-23
申请号：US14797358
申请日：2015-07-13
申请人： Stephan Biber
发明人： Stephan Biber
IPC分类号： G01R33/36 , G01R33/341 , G01R33/422 , G01R33/3415
摘要： A sheath current for an imaging magnetic resonance tomography system is provided, wherein a coil element of the sheath current filter is embodied to surround a waveguide of the sheath current filter, a local coil connection, and a local coil.
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公开(公告)号：US20190187227A1
公开(公告)日：2019-06-20
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
CPC分类号： G01R33/3628 , G01R33/34007 , G01R33/341 , G01R33/3415 , G01R33/3685
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：US10281536B2
公开(公告)日：2019-05-07
申请号：US14977072
申请日：2015-12-21
发明人： Yi-Qiao Song
IPC分类号： G01V3/00 , G01R33/341 , G01R33/50 , G01R33/38 , G01R33/483 , G01R33/24
摘要： A system and method for magnetic resonance imaging (MRI) of a subject employs an elongate housing configured to be held and manipulated in a user's hand. The housing supports at least one permanent magnet and at least one RF coil. A device positioning subsystem measures position and orientation of the housing. An electronic subsystem interfaces to the at least one RF coil and to the device positioning subsystem. The electronic subsystem is configured to i) execute pulse sequences where each pulse sequence transmits at least one RF pulse into body tissue of the subject and acquires MRI signals from the body tissue of the subject, ii) acquire position data representing position and orientation of the housing during the pulse sequences from the device positioning subsystem, and iii) process the MRI signals of i) together with the position data of ii) to derive an image of the body tissue of the subject.
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公开(公告)号：US10274634B2
公开(公告)日：2019-04-30
申请号：US15258749
申请日：2016-09-07
发明人： Lizhi Xiao , Guangzhi Liao , Qunjie Du , Xin Li , Sihui Luo
摘要： The present invention provides a nuclear magnetic resonance logging instrument probe with double-layered magnets and an antenna excitation method, the nuclear magnetic resonance logging instrument probe includes: a probe framework and a shielding layer arranged in the probe framework; a plurality of main magnets are provided above and below the shielding layer, respectively; central axes of the main magnets are parallel with each other, and distances between the central axes of each of the main magnets and a central axis of the probe framework are the same; a distance between central axes of any two main magnets is not smaller than a first preset value; and an antenna is provided at outer side of each main magnety. In the present invention, circumferential recognizing capability of the nuclear magnetic resonance logging instrument probe can be improved and three-dimensional (radial, axial and circumferential) stratum detection can be achieved.
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