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    PROCEDE ET DISPOSITIF D'IMAGERIE PAR RESONANCE MAGNETIQUE
    1.
    发明公开
    PROCEDE ET DISPOSITIF D'IMAGERIE PAR RESONANCE MAGNETIQUE 审中-公开

    公开(公告)号：EP3295201A1

    公开(公告)日：2018-03-21

    申请号：EP16725787

    申请日：2016-05-12

    申请人： UNIV PARIS SUD ,  CENTRE NAT RECH SCIENT

    发明人： DE ROCHEFORT LUDOVIC MARIE XAVIER

    IPC分类号： G01R33/54 ,  G01R33/44 ,  G01R33/50 ,  G01R33/561 ,  G01R33/563 ,  G01R33/58

    CPC分类号： G01R33/586 ,  G01R33/448 ,  G01R33/50 ,  G01R33/54 ,  G01R33/5613 ,  G01R33/56341

    摘要： The present invention relates to a MRI device (1) comprising: means (2) for applying a main magnetic field B0 on an axis Z over a sample zone (8); means (3) for emitting a magnetic field gradient and means (4) for emitting a radiofrequency pulse, and control means (5) arranged so as to control the means for emitting a magnetic field gradient and the means for emitting a radiofrequency pulse. The control means are programmed to carry out at least one set of repeated applications, on the sample zone, of a sequence comprising: a radiofrequency pulse possibly of variable amplitude and/or phase at each repetition; and after the radio frequency pulse, a spatial gradient of the component along the Z axis of the magnetic field. The control means are programmed so that, in the course of repeated applications of the radiofrequency pulse and of the magnetic field spatial gradient of the sequence of one and the same set: the radio frequency pulse follows, between its various repeated applications, a periodic series (preferably non-constant) for its amplitude and for a series
    u n
    +l =
    v n
    +l -
    v n ; and each repeated application of the spatial gradient of magnetic field of the sequence a, according to a so-called coding spatial direction, a non zero timing integral equal to A and identical for each application of gradient of this set. The invention also relates to the method implemented by this device.

    MAGNETIC RESONANCE IMAGING APPARATUS AND METHOD OF GENERATING MAGNETIC RESONANCE IMAGE BY USING NAVIGATOR ECHOES
    3.
    发明公开
    MAGNETIC RESONANCE IMAGING APPARATUS AND METHOD OF GENERATING MAGNETIC RESONANCE IMAGE BY USING NAVIGATOR ECHOES 审中-公开
    磁共振成像装置及利用导航回波产生磁共振成像的方法

    公开(公告)号：EP3214457A2

    公开(公告)日：2017-09-06

    申请号：EP17158914.6

    申请日：2017-03-02

    申请人： Samsung Electronics Co., Ltd.

    发明人： Choi, Joon-sung ,  Hwang, Jin-young

    IPC分类号： G01R33/567

    CPC分类号： G01R33/4818 ,  G01R33/482 ,  G01R33/4824 ,  G01R33/4833 ,  G01R33/5611 ,  G01R33/5613 ,  G01R33/5616 ,  G01R33/56509

    摘要： A magnetic resonance imaging apparatus includes a radio frequency (RF) controller configured to, during a repetition time (TR) period among TR periods, apply at least one RF pulse corresponding to a first slice to an object, and apply a navigator RF pulse corresponding to a second slice adjacent to the first slice to the object, a data obtainer configured to, during the TR period, obtain first k-space data corresponding to the applied at least one RF pulse, and obtain second k-space data corresponding to the applied navigator RF pulse, and an image processor configured to generate navigator images, based on pieces of second k-space data that are obtained during the TR periods, the pieces comprising the second k-space obtained during the TR period, correct the first k-space data, based on the navigator images, and generate a magnetic resonance image of the first slice, based on the corrected first k-space data.

    摘要翻译： 一种磁共振成像设备包括：射频（RF）控制器，被配置为在TR周期中的重复时间（TR）周期期间将对应于第一切片的至少一个RF脉冲施加到对象，并且将对应的导航RF脉冲 所述数据获取器被配置为在所述TR时段期间获得与所施加的至少一个RF脉冲相对应的第一k空间数据，并且获得与所述第一切片相对应的第二k空间数据 以及图像处理器，其被配置为基于在TR时段期间获得的多条第二k空间数据来生成导航图像，所述多条第二k空间数据包括在TR时段期间获得的第二k空间，校正第一k空间数据 - 基于导航图像的空间数据，并且基于校正后的第一k空间数据生成第一切片的磁共振图像。

    SPATIALLY ENCODED PHASE-CONTRAST MRI
    5.
    发明公开
    SPATIALLY ENCODED PHASE-CONTRAST MRI 有权
    国土CODED相衬MRI

    公开(公告)号：EP2699926A1

    公开(公告)日：2014-02-26

    申请号：EP11716489.7

    申请日：2011-04-21

    申请人： Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V.

    发明人： MERBOLDT, Klaus-Dietmar ,  FRAHM, Jens ,  UECKER, Martin ,  VOIT, Dirk

    IPC分类号： G01R33/48

    CPC分类号： G01R33/48 ,  G01R33/286 ,  G01R33/4826 ,  G01R33/5613 ,  G01R33/56316 ,  G01R33/56325

    摘要： A method of collecting magnetic resonance data for imaging an object with a predetermined spin density being arranged in a static magnetic field, comprises the steps subjecting said object to at least one radiofrequency pulse and magnetic field gradients for creating spatially encoded magnetic resonance signals, including at least two settings of spatially encoding phase-contrast gradients differently encoding the phase of said magnetic resonance signals in at least one field of view in a predetermined spatial dimension, acquiring at least two magnetic resonance signals, each with one of said at least two settings of different spatially encoding phase-contrast gradients, and determining at least one mean spin density position of said object along said spatial dimension by calculating the phase difference between said signals. Furthermore, a control device and a magnetic resonance imaging (MRI) device implementing the method are described.

    BLACK-BLOOD STEADY-STATE FREE PRECESSION MAGNETIC RESONANCE IMAGING
    8.
    发明公开
    BLACK-BLOOD STEADY-STATE FREE PRECESSION MAGNETIC RESONANCE IMAGING 有权
    黑血MRI自由进动平衡状态

    公开(公告)号：EP2010932A1

    公开(公告)日：2009-01-07

    申请号：EP07760006.2

    申请日：2007-04-03

    申请人： Koninklijke Philips Electronics N.V.

    发明人： HERZKA, Daniel, A. ,  DERBYSHIRE, John, A.

    IPC分类号： G01R33/561

    CPC分类号： G01R33/5613 ,  G01R33/5607 ,  G01R33/5614

    摘要： In an imaging method, periodic maintenance radio frequency pulses (α, -α) are applied to maintain a steady state magnetic resonance excitation in an imaging region. Readout (66) of imaging data from the imaging region is performed during selected intervals between maintenance radio frequency pulses. A spatially selective blood signal suppression sequence (62, 62') is performed during selected other intervals between maintenance radio frequency pulses. The blood signal suppression sequence suppresses a blood signal in a suppression region different from the imaging region. The blood signal suppression sequence has substantially no zero the moment applied magnetic field gradient.

    Phase cycling method in SSFP pulse sequence and magnetic resonance imaging apparatus
    9.
    发明公开
    Phase cycling method in SSFP pulse sequence and magnetic resonance imaging apparatus 审中-公开
    在SSFP脉冲序列和MRI成像系统相循环过程

    公开(公告)号：EP1666911A3

    公开(公告)日：2007-04-25

    申请号：EP05256515.7

    申请日：2005-10-21

    申请人： GE Medical Systems Global Technology Company, LLC

    发明人： Ikezaki, Yoshikazu

    IPC分类号： G01R33/561

    CPC分类号： G01R33/5613

    摘要： In order to positively decrease the band artifact on the middle of image when the field ununiformity is relatively fair and Nex is small, the present invention provides a phase cycling method for use in SSFP pulse sequence of a gradient echo system for rolling back the phase shift of lateral magnetization developed in TR by the gradient field prior to the next RF excitation, by identifying the RF transmission phase developing the band artifact in the vicinity of zero amount of phase shift, namely the repetition of 0-0-0-0 (degrees) as unusable RF transmission phase to use a plurality of RF transmission phases other than the unusable RF transmission phase for the phase cycling.

    PULSE SEQUENCES FOR EXCITING NUCLEAR QUADRUPOLE RESONANCE
    10.
    发明公开
    PULSE SEQUENCES FOR EXCITING NUCLEAR QUADRUPOLE RESONANCE 审中-公开
    脉冲序列激发的核极共振

    公开(公告)号：EP1535087A4

    公开(公告)日：2006-05-24

    申请号：EP03729708

    申请日：2003-06-20

    申请人： QR SCIENCES LTD

    发明人： MIKHALTSEVITCH VASSILI TIMOFEE ,  RUDAKOV TARAS NIKOLAEVITCH ,  FLEXMAN JOHN HAROLD ,  HAYES PETER ALARIC ,  CHISHOLM WARRICK PAUL

    IPC分类号： G01R33/44 ,  G01R33/561 ,  G01V3/14 ,  G01R33/54

    CPC分类号： G01R33/441 ,  G01N24/084 ,  G01R33/5613

    摘要： An apparatus and a method for producing a multi-pulse sequence for irradiating a substance provided with quadrupole nuclei with either integer or half-integer spins to detect an NQR signal emitted therefrom. The apparatus has pulse sequence generating means adapted to produce a combination of two or more pulse sequences, arranged so that a definite regularity of the phase alteration of pulses in each of the pulse sequences occurs that is equivalent to a shift of spectral components of the pulse sequences in relation to each other. Furthermore, in at least one of the pulse sequences, there are not less than two phases alternating. A preparatory pulse may be included in one of the pulse sequences to reduce the effect of temperature, increase the intensity of the NQR signal and simultaneously eliminate intensity anomalies. Alternatively, the combination of pulse sequences may be different from a combination of PAPS and NPAPS, and none of the pulse sequences contain a preparatory pulse.