公开(公告)号：US12130346B2

公开(公告)日：2024-10-29

申请号：US17792408

申请日：2021-05-13

Applicant: WUXI MARVEL STONE HEALTHCARE CO., LTD.

Inventor： Hai Luo ,  Weiqian Wang ,  Xiao Chen ,  Yue Zhao ,  Yunhao Xie ,  Ziyue Wu

IPC: G01R33/48 ,  A61B5/055 ,  G01R33/34 ,  G01R33/565 ,  A61B5/00

CPC classification number: G01R33/4828 ,  A61B5/055 ,  G01R33/34092 ,  G01R33/56563 ,  A61B5/704

Abstract: A comprehensive and integrated solution, including a dedicated system structure and grounding mechanism, a main radio frequency (RF) coil to transmit and receive signal, secondary RF coils to saturate unwanted signals from non-region-of-interest (ROI) in the excited region, an RF shielding structure configured to shield the main RF coil from generating signals on the non-ROI, and an environmental noise active cancellation mechanism is proposed to construct an NMR system for non-invasive quantitative detection of organs, and further improves the target region selectivity and detection accuracy.

公开(公告)号：US12111371B2

公开(公告)日：2024-10-08

申请号：US18321736

申请日：2023-05-22

Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

Inventor： Xiangming Hou

IPC: G01R33/34 ,  G01R33/30 ,  G01R33/36

CPC classification number: G01R33/34092 ,  G01R33/30 ,  G01R33/3628

Abstract: A magnetic resonance imaging (MRI) coil device is provided. The device includes a first receiver coil portion, a second receiver coil portion, and a locking mechanism. The second receiver coil portion is configured to fit with the first receiver coil portion to provide a receiver coil assembly. The second receiver coil portion is moveable relative to the first receiver coil portion. The locking mechanism is configured to limit relative movement between the first receiver coil portion and the second receiver coil portion when the first receiver coil portion and the second receiver coil portion are fit together.

公开(公告)号：US20240329174A1

公开(公告)日：2024-10-03

申请号：US18737247

申请日：2024-06-07

Applicant: The MITRE Corporation

Inventor： Joseph DAGHER ,  Ben BERMAN

IPC: G01R33/565 ,  A61B5/055 ,  G01R33/34 ,  G01R33/56

CPC classification number: G01R33/56509 ,  A61B5/055 ,  G01R33/34092 ,  G01R33/5608

Abstract: Systems and methods for estimating magnetic susceptibility of a patient through continuous motion in an MRI scanner are provided herein. In one or more examples, during the collection of data, the patient can be instructed to move their head or other part of the body in a continuous manner and for a fixed duration of time. During the fixed duration of time, magnitude a data from the RF signal can be received by one or more RF coils can be collected. The received and undersampled magnitude data can be converted to phase data which can then be converted to magnetic susceptibility. Thus magnetic susceptibility can be determined while allowing for continuous motion during the MRI scan, which can be more comfortable and feasible for the patient in contrast to techniques that require the patient to hold their body at a particular orientation in the scanner for a fixed duration of time.

公开(公告)号：US20240219492A1

公开(公告)日：2024-07-04

申请号：US18401372

申请日：2023-12-30

Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

Inventor： Dashen CHU ,  Shihao CHEN ,  Shang XU ,  Yunlei YAO ,  Hai LU

IPC: G01R33/34

CPC classification number: G01R33/34092

Abstract: The present disclosure provides surface coils and magnetic resonance devices. The surface coil may include: a radio frequency coil, a transmission line, and a preamplifier. The radio frequency coil may include at least one coil unit, the at least one coil unit receiving a magnetic resonance signal. One end of the transmission line may be connected to the radio frequency coil, another end of the transmission line may extend out of the radio frequency coil and may be connected to the preamplifier, and the transmission line may be configured to perform impedance transformations between the radio frequency coil and the preamplifier and transmit the magnetic resonance signal received by the radio frequency coil to the preamplifier. The preamplifier may receive and amplify the magnetic resonance signal received by the radio frequency coil.

公开(公告)号：US11898976B2

公开(公告)日：2024-02-13

申请号：US16824014

申请日：2020-03-19

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Pavel Kortunov ,  Hubert E. King ,  Harry W. Deckman

IPC: G01N24/08 ,  G01V3/14 ,  G01V3/38 ,  G01R33/44 ,  G01R33/34

CPC classification number: G01N24/081 ,  G01R33/44 ,  G01V3/14 ,  G01V3/38 ,  G01R33/34092

Abstract: A method for determining the pore types of a core sample can include: determining a porosity of a core sample, wherein the core sample has a permeability of 10 mD or less; saturating the core sample with a NMR saturation fluid to achieve a saturated core sample; taking a NMR measurement of fluids in the saturated core sample; and deriving a volume for a pore type based on the porosity based on a correlation between the NMR measurement and a NMR signal to fluid volume calibration, wherein the pore type is selected from the group consisting of a nanopore, a micropore, a macropore, and any combination thereof.

公开(公告)号：US11852702B2

公开(公告)日：2023-12-26

申请号：US17275605

申请日：2019-09-10

Applicant: RIKEN

Inventor： Masato Takahashi

IPC: G01R33/36 ,  G01R33/34

CPC classification number: G01R33/3671 ,  G01R33/34092 ,  G01R33/3657

Abstract: A magnetic resonance measurement apparatus according to the present invention includes a first LC circuit that forms an oscillating magnetic field that causes an object to exhibit magnetic resonance. The first LC circuit includes a parallel connection assembly including a diode. The parallel connection assembly further includes a diode connected, in parallel and in reverse direction, to the diode, or an inductor connected in parallel to the diode. In a first state in which oscillating voltage for forming the oscillating magnetic field is applied to the first LC circuit, the diode of the parallel connection assembly functions as a short-circuit such that the resonance frequency of the first LC circuit becomes a first resonance frequency. In a second state in which oscillating voltage is not applied to the first LC circuit, the diode of the parallel connection assembly functions as capacitance such that the resonance frequency of the first LC circuit becomes a second resonance frequency that is different from the first resonance frequency.

公开(公告)号：US20230288504A1

公开(公告)日：2023-09-14

申请号：US18321736

申请日：2023-05-22

Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

Inventor： Xiangming HOU

IPC: G01R33/34 ,  G01R33/30 ,  G01R33/36

CPC classification number: G01R33/34092 ,  G01R33/30 ,  G01R33/3628

Abstract: A magnetic resonance imaging (MRI) coil device is provided. The device includes a first receiver coil portion, a second receiver coil portion, and a locking mechanism. The second receiver coil portion is configured to fit with the first receiver coil portion to provide a receiver coil assembly. The second receiver coil portion is moveable relative to the first receiver coil portion. The locking mechanism is configured to limit relative movement between the first receiver coil portion and the second receiver coil portion when the first receiver coil portion and the second receiver coil portion are fit together.

公开(公告)号：US20190011514A1

公开(公告)日：2019-01-10

申请号：US16130788

申请日：2018-09-13

Applicant: Hyperfine Research, Inc.

Inventor： Michael Stephen Poole ,  Cedric Hugon

IPC: G01R33/385 ,  G01R33/44 ,  G01R33/389 ,  A61B50/13 ,  A61B90/00

CPC classification number: G01R33/3852 ,  A61B5/0555 ,  A61B6/4405 ,  A61B50/13 ,  A61B90/00 ,  A61B2560/0431 ,  A61G13/104 ,  G01R33/34092 ,  G01R33/3642 ,  G01R33/3657 ,  G01R33/38 ,  G01R33/3802 ,  G01R33/3806 ,  G01R33/383 ,  G01R33/385 ,  G01R33/3854 ,  G01R33/3873 ,  G01R33/389 ,  G01R33/4215 ,  G01R33/422 ,  G01R33/445 ,  G01R33/48 ,  G01R33/5608

Abstract: An apparatus for providing a B0 magnetic field for a magnetic resonance imaging system, the apparatus comprising: at least one permanent B0 magnet to produce a magnetic field to contribute to the B0 magnetic field for the magnetic resonance imaging system, the at least one permanent B0 magnet comprising a plurality of permanent magnet rings, each of the plurality of permanent magnet rings comprising a plurality of permanent magnet segments having a respective height in a direction normal to the respective permanent magnet ring, wherein the height of at least one first permanent magnet segment is different than the height of at least one second permanent magnet segment, and wherein the at least one first permanent magnet segment and the at least one second permanent magnet are in different ones of the plurality of permanent magnet rings.

公开(公告)号：US10073153B2

公开(公告)日：2018-09-11

申请号：US14546359

申请日：2014-11-18

Applicant: JEOL Ltd.

Inventor： Masanori Hirose ,  Yoshiaki Yamakoshi ,  Masahide Nishiyama ,  Shinji Nakamura ,  Katsuyuki Toshima ,  Fumio Hobo ,  Terumasa Okada ,  Shigenori Tsuji ,  Ryoji Tanaka ,  Hiroto Suematsu

IPC: G01V3/00 ,  G01R33/34 ,  G01R33/30

CPC classification number: G01R33/34007 ,  G01R33/307 ,  G01R33/34015 ,  G01R33/34092

Abstract: A device for attaching and detaching a cryogenic probe to and from a nuclear magnetic resonance (NMR) spectrometer. The device permits the probe to be loaded in the spectrometer in a shortened time and achieves high measurement throughput. The device has loading platforms (11-1, 11-2) on which cryogenic probes (P1, P2) are loaded. Each loading platform has a horizontal drive mechanism, a vertical drive mechanism, and a spacing mechanism. The device further includes probe cooling devices (14-1, 14-2) for circulating a refrigerant to and from the cryogenic probes (P1, P2) via transfer tubes (12-1, 12-2) made of a flexible material, thus cooling the probes (P1, P2). A temperature-controlled gas feeder (18) supplies a temperature variable gas for temperature adjustment to the probes (P1, P2). A vacuum pumping system (15) evacuates the interiors of the probes (P1, P2) via vacuum pipes (17-1, 17-2) made of a flexible material.

公开(公告)号：US10060994B2

公开(公告)日：2018-08-28

申请号：US14439137

申请日：2013-10-23

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Christian Findeklee ,  Christoph Leussler

IPC: G01V3/18 ,  G06F3/041 ,  G01R33/34 ,  G01R33/3415 ,  G01R33/345 ,  G01R33/561 ,  G01R33/565

CPC classification number: G01R33/34076 ,  G01R33/34046 ,  G01R33/34092 ,  G01R33/3415 ,  G01R33/3453 ,  G01R33/5612 ,  G01R33/5659

Abstract: A radio frequency (RF) antenna device (140) applies an RF field to an examination space (116) of a magnetic resonance (MR) imaging system (110). The RF antenna device (140) has a tubular body and is segmented in its longitudinal direction (154). Each segment (162, 164) has at least one activation port. The result is that each mode, corresponding to an activation port, may be controlled individually. Accordingly, the inhomogeneity of the subject of interest in the longitudinal direction of the RF antenna device can directly be addressed. There are different ways to build up a z-segmented RF antenna device.