公开(公告)号：US11918335B2

公开(公告)日：2024-03-05

申请号：US17010870

申请日：2020-09-03

Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY

Inventor： Haifeng Wang ,  Dong Liang ,  Hairong Zheng ,  Xin Liu ,  Shi Su ,  Zhilang Qiu

IPC: A61B5/055 ,  G01R33/28 ,  G01R33/48

CPC classification number: A61B5/055 ,  G01R33/28 ,  G01R33/48

Abstract: A magnetic resonance imaging method includes: obtaining three-dimensional under-sampling data of a target object based on a first three-dimensional magnetic resonance imaging sequence; obtaining a three-dimensional point spread function based on the three-dimensional under-sampling data or a two-dimensional mapping data of the target object; obtaining a sensitivity map of the target object based on the data collected by three-dimensional low-resolution complete sampling; performing imaging reconstruction to the three-dimensional under-sampling data based on the three-dimensional point spread function and the sensitivity map to obtain a reconstructed magnetic resonance image. The first three-dimensional magnetic resonance imaging sequence has a first sinusoidal gradient field on a phase direction and a second sinusoidal gradient field on a layer selection direction. 0-order moments of the first and the second three-dimensional magnetic resonance imaging sequences are 0. A phase difference between the first and the second three-dimensional magnetic resonance imaging sequence is π/2.

公开(公告)号：US11662412B2

公开(公告)日：2023-05-30

申请号：US17541070

申请日：2021-12-02

Applicant: Hyperfine Operations, Inc.

Inventor： Todd Rearick ,  Gregory L. Charvat ,  Matthew Scot Rosen ,  Jonathan M. Rothberg

IPC: G01R33/56 ,  G01R33/36 ,  G01R33/38 ,  G01R33/385 ,  G01R33/28 ,  G01R33/565 ,  G01R33/44 ,  G01R33/58 ,  G01R33/48 ,  G01R33/54 ,  G01R33/34 ,  H01F7/02 ,  H01F7/06 ,  G01R33/381 ,  G01R33/383 ,  G01R33/3875 ,  G01R33/422

CPC classification number: G01R33/5608 ,  G01R33/28 ,  G01R33/34007 ,  G01R33/36 ,  G01R33/3614 ,  G01R33/38 ,  G01R33/381 ,  G01R33/3802 ,  G01R33/383 ,  G01R33/3804 ,  G01R33/385 ,  G01R33/3806 ,  G01R33/3852 ,  G01R33/3854 ,  G01R33/3856 ,  G01R33/3858 ,  G01R33/3875 ,  G01R33/445 ,  G01R33/48 ,  G01R33/543 ,  G01R33/546 ,  G01R33/56 ,  G01R33/56518 ,  G01R33/58 ,  H01F7/02 ,  H01F7/06 ,  G01R33/422

Abstract: According to some aspects, a method of suppressing noise in an environment of a magnetic resonance imaging system is provided. The method comprising estimating a transfer function based on multiple calibration measurements obtained from the environment by at least one primary coil and at least one auxiliary sensor, respectively, estimating noise present in a magnetic resonance signal received by the at least one primary coil based at least in part on the transfer function, and suppressing noise in the magnetic resonance signal using the noise estimate.

公开(公告)号：US20180210043A1

公开(公告)日：2018-07-26

申请号：US15412096

申请日：2017-01-23

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Wen Deng ,  Xi Rong Chen

IPC: G01R33/34 ,  A61B5/055

CPC classification number: G01R33/34084 ,  A61B5/055 ,  A61B5/0555 ,  G01R33/28 ,  G01R33/34007

Abstract: The present invention provides a fixation mechanism (5) for fixing a flex coil unit of a MRI system onto a patient comprising an oblique-shaped clip (9) comprising a first portion (9a) and a second portion (9b) arranged to form an oblique angle therebetween, wherein the first portion (9a) is configured to be arranged with a strap (7) along which the oblique-shaped clip (9) is subject to a force when the flex coil unit is fixed onto the patient; and an elongated slot (11) located at a longitudinal side of a housing of a spine coil unit of the MRI system and formed at least partially by the housing of the spine coil unit, the elongated slot (11) being configured to receive the second portion (9b) of the oblique-shaped clip (9) and further configured to allow the second portion (9b) of the oblique-shaped clip (9) to abut against a side wall of the elongated slot (11) by the force along the strap (7). According to the present invention, it is very convenient for an operator to insert the clip into the slot or release the clip out of the slot at any position along the longitudinal direction of the housing.

公开(公告)号：US20180204358A1

公开(公告)日：2018-07-19

申请号：US15872380

申请日：2018-01-16

Applicant: Hongyu An ,  Cihat Eldeniz

Inventor： Hongyu An ,  Cihat Eldeniz

IPC: G06T11/00 ,  G06T7/00 ,  G06T7/246 ,  A61B5/055 ,  G01R33/00 ,  G01R33/28

CPC classification number: G06T11/006 ,  A61B5/024 ,  A61B5/055 ,  A61B5/0816 ,  A61B5/7285 ,  G01R33/0005 ,  G01R33/0029 ,  G01R33/28 ,  G01R33/4826 ,  G01R33/56509 ,  G01R33/5676 ,  G06T7/0014 ,  G06T7/248 ,  G06T2207/10088 ,  G06T2211/436

Abstract: Systems and methods for producing motion-corrected MR images that include an MRI scanner with a plurality of coils in which the plurality of coils is configured to detect a plurality of MR imaging datasets are provided. Each MR imaging dataset includes a plurality of MR signals detected by one coil of the plurality of coils. The system further includes a controller operatively coupled to the MRI scanner that includes at least one processor and a non-volatile memory. The controller further includes an image processing unit configured to receive the plurality of MR imaging datasets associated with the plurality of coils, identify a motion cycle using an automated motion detection method, and to partition the plurality of MR imaging datasets into a plurality of image groups, in which each image group comprises a portion of the plurality of MR imaging datasets associated with one of the phases of the motion cycle.

公开(公告)号：US20180172789A1

公开(公告)日：2018-06-21

申请号：US15553933

申请日：2016-02-25

Applicant: King's College London

Inventor： Ralph Sinkus ,  Ondrej Holub ,  Simon Lambert ,  Rachel Clough

IPC: G01R33/563 ,  A61B5/00 ,  G01R33/28 ,  A61B5/055

CPC classification number: G01R33/56358 ,  A61B5/0051 ,  A61B5/055 ,  G01R33/28 ,  G01R33/56308

Abstract: Embodiments of the invention provide a magnetic resonance (MR) compatible transducer for magnetic resonance elastography applications having a cantilevered drive element (54) a free end of which is arranged in use to move reciprocally, and a flexible non-conductive connection rod (62) slidably disposed within a flexible non-conductive sleeve (60). The connection rod is affixed at a proximal end to the cantilevered drive element via a proximal flexible connection piece (64) that in use accommodates the slight rotational movement of the cantilevered drive element as it reciprocates about its secured end, whilst translating the rotational reciprocation of the cantilevered drive element into a pure translational reciprocation of the connection rod within the sleeve. The distal end of the connection rod is affixed against a protrusion connected to another cantilevered driven element (56), upon which is mounted a piston element (58) that in use contacts the subject. The distal end of the connection rod is provided with a distal flexible connection piece that forms the connection between the end of the connection rod and the cantilevered driven element, again to account for the pure translational movement of the rod being converted to rotational movement of the cantilevered driven element about its cantilever pivot point.

公开(公告)号：US09903922B2

公开(公告)日：2018-02-27

申请号：US15438269

申请日：2017-02-21

Applicant: Weinberg Medical Physics, Inc.

Inventor： Irving N. Weinberg ,  Pavel Stepanov

IPC: G01V3/00 ,  G01R33/28 ,  G01R33/54 ,  G01R33/385 ,  G01R33/36 ,  A61B5/055

CPC classification number: G01R33/288 ,  A61B5/055 ,  G01R33/28 ,  G01R33/36 ,  G01R33/385 ,  G01R33/3852 ,  G01R33/54 ,  G01R33/543

Abstract: A magnetic field generator includes a power source and a segmented or un-segmented coil connected to the power source to generate a time-varying magnetic field. Energy is applied to the coil so that the coil generates a time-varying magnetic field gradient with a magnitude of at least 1 milliTesla per meter and a rise-time of less than 1000 microseconds. The coil may be comprised of overlapping, non-overlapping or partially overlapping coil segments that may individually energized to further improve the operating characteristics of the coil to further decrease bio-effects in magnetic resonance imaging through the use of reduced pulse lengths and multi-phasic magnetic gradient pulses.

公开(公告)号：US20180049841A1

公开(公告)日：2018-02-22

申请号：US15678332

申请日：2017-08-16

Applicant: Andre Bender ,  Daniel Gareis ,  Manuel Noras ,  Rainer Kurth ,  Volker Matschl ,  Heinrich von Busch

Inventor： Andre Bender ,  Daniel Gareis ,  Manuel Noras ,  Rainer Kurth ,  Volker Matschl ,  Heinrich von Busch

IPC: A61B90/30 ,  G01R33/341 ,  G01R33/30 ,  A61B5/055 ,  A61B10/00 ,  A61B10/02 ,  F21V23/04

CPC classification number: A61B90/30 ,  A61B5/0555 ,  A61B5/1115 ,  A61B5/1126 ,  A61B5/4312 ,  A61B5/6891 ,  A61B5/7285 ,  A61B10/0041 ,  A61B10/0233 ,  A61B2090/309 ,  A61B2562/0214 ,  A61B2562/0257 ,  F21V23/0471 ,  F21Y2115/10 ,  G01R33/28 ,  G01R33/30 ,  G01R33/34046 ,  G01R33/341

Abstract: The present embodiments relate to an MR local coil arrangement and an MR unit. An MR local coil arrangement is disclosed including at least one MR antenna, an illumination unit with at least one light-generating unit to illuminate an illumination region, and a switching unit with at least one sensor to control the illumination unit.

公开(公告)号：US20180031649A1

公开(公告)日：2018-02-01

申请号：US15550810

申请日：2016-02-18

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Paul Royston HARVEY ,  Cornelis Leonardus Gerardu HAM

IPC: G01R33/30 ,  G01R33/563 ,  G01R33/567 ,  A61B5/055 ,  A61B5/00

CPC classification number: G01R33/307 ,  A61B5/055 ,  A61B5/0555 ,  A61B5/704 ,  A61B5/7203 ,  G01R33/28 ,  G01R33/3415 ,  G01R33/56358 ,  G01R33/5673

Abstract: A magnetic resonance examination system in which the patient carrier is mounted moveably in a direction transverse to the support surface and an RF antenna having a fixed geometrical relation to the support surface.

公开(公告)号：US09867549B2

公开(公告)日：2018-01-16

申请号：US14828299

申请日：2015-08-17

Applicant: THE QUEEN'S MEDICAL CENTER ,  THE UNIVERSITY OF HAWAII ,  THE MEDICAL COLLEGE OF WISCONSIN, INC. ,  UWM RESEARCH FOUNDATION, INC.

Inventor： Thomas Michael Ernst ,  Thomas Edmund Prieto ,  Brian Stewart Randall Armstrong

IPC: A61B5/00 ,  A61B5/055 ,  A61B6/04 ,  A61B5/11 ,  G01R33/28 ,  G01R33/565 ,  G06T7/00 ,  A61B6/00 ,  G06K9/00 ,  H04N7/18 ,  G06T7/70 ,  G06K9/32 ,  G06K17/00

CPC classification number: A61B5/055 ,  A61B5/0077 ,  A61B5/1127 ,  A61B5/1128 ,  A61B5/721 ,  A61B5/7292 ,  A61B6/0492 ,  A61B6/547 ,  G01R33/28 ,  G01R33/56509 ,  G06K9/00624 ,  G06K2009/3291 ,  G06K2017/0045 ,  G06T7/0012 ,  G06T7/70 ,  H04N7/18

Abstract: This invention relates to a system that adaptively compensates for subject motion in real-time in an imaging system. An object orientation marker (30), preferably a retro-grate reflector (RGR), is placed on the head or other body organ of interest of a patient (P) during a scan, such as an MRI scan. The marker (30) makes it possible to measure the six degrees of freedom (x, y, and z-translations, and pitch, yaw, and roll), or “pose”, required to track motion of the organ of interest. A detector, preferably a camera (40), observes the marker (30) and continuously extracts its pose. The pose from the camera (40) is sent to the scanner (120) via an RGR processing computer (50) and a scanner control and processing computer (100), allowing for continuous correction of scan planes and position (in real-time) for motion of the patient (P). This invention also provides for internal calibration and for co-registration over time of the scanner's and tracking system's reference frames to compensate for drift and other inaccuracies that may arise over time.

公开(公告)号：US09820676B2

公开(公告)日：2017-11-21

申请号：US14548276

申请日：2014-11-19

Applicant: Life Services LLC

Inventor： Brandon J. Tramm ,  Matthew T. Waks ,  Charles A. Lemaire ,  Scott M. Schillak

IPC: A61B5/055 ,  G01R33/34 ,  A61J15/00 ,  A61B5/053 ,  A61M16/00 ,  G01R33/28 ,  A61M21/02 ,  A61B5/00 ,  A61M21/00

CPC classification number: A61B5/0555 ,  A61B5/053 ,  A61B5/7405 ,  A61B5/7465 ,  A61B2503/06 ,  A61J15/00 ,  A61M16/00 ,  A61M21/02 ,  A61M2021/0027 ,  A61M2021/0066 ,  A61M2205/3368 ,  G01R33/28 ,  G01R33/283 ,  G01R33/34 ,  G01R33/34046 ,  G01R33/34084

Abstract: Apparatus and method for imaging a patient in an MRI system. This includes a frame, and at least one assembly that includes a patient-interface positioner connected to a reference position on the frame, a first lockable joint on the positioner; and a patient interface connected to a patient-proximal end of the positioner by a second joint, wherein the first patient-interface is moveably positioned to a selected pitch angle, a selected yaw angle, and a selected one of a plurality of distances relative to the reference position on the frame. The first lockable joint is configured to be tightened to yieldably hold the first patient-interface at the selected pitch and yaw angles, and at the selected one of the plurality of distances, relative to the reference position. Optionally a second substantially similar patient-interface and assembly are provided. The earpiece(s) optionally include audio transducer(s) and/or RF coil(s).