公开(公告)号：US07375519B2

公开(公告)日：2008-05-20

申请号：US11379395

申请日：2006-04-20

申请人： Yuval Zur

发明人： Yuval Zur

IPC分类号： G01V3/00

CPC分类号： G01R33/5616 ,  G01R33/56518 ,  G01R33/56554 ,  G01R33/56563

摘要： Phase and magnitude correction is performed in two dimensions to reduce ghosting in single shot and multi-shot EPI scans. First, a phase/magnitude correction in the readout direction is carried out to reduce echo shifts and gradient waveform distortions. Then, a two dimensional phase/magnitude correction is performed to remove the remaining xy phase/magnitude errors.

摘要翻译： 相位和幅度校正在二维中执行，以减少单次和多次EPI扫描中的重影。 首先，进行读出方向的相位/幅度校正，以减少回波偏移和梯度波形失真。 然后，执行二维相位/幅度校正以消除剩余的xy相位/幅度误差。

公开(公告)号：US20060084861A1

公开(公告)日：2006-04-20

申请号：US10968853

申请日：2004-10-18

申请人： Aharon Blank ,  Gadi Lewkonya ,  Yuval Zur ,  Hanna Friedman ,  Gil Tidhar

发明人： Aharon Blank ,  Gadi Lewkonya ,  Yuval Zur ,  Hanna Friedman ,  Gil Tidhar

IPC分类号： A61B5/05 ,  A61B6/00 ,  A61M25/00

CPC分类号： G01R33/285 ,  A61B5/02007 ,  A61B5/055 ,  G01R33/287 ,  G01R33/3808 ,  G01R33/383

摘要： A probe, with a longitudinal axis, for use in an NMR system, the probe comprising: (a) a plurality of static magnetic field sources which create a static magnetic field that is non-axisymmetric about the longitudinal axis, in a region outside the probe; and (b) at least one antenna, compromising one or more antennas together capable of creating a time-varying magnetic field which is capable of exciting nuclei in a sub-region of the region, and capable of receiving NMR signals from said excited nuclei and generating NMR electrical signals therefrom; wherein the plurality of magnetic field sources comprise adjacent static magnetic field sources that are magnetized in directions that differ by more than 10 degrees and less than 170 degrees.

摘要翻译： 具有纵向轴线的用于NMR系统的探针，所述探针包括：（a）多个静态磁场源，其产生围绕所述纵向轴线非轴对称的静态磁场， 探测; 并且（b）至少一个天线，将一个或多个天线一起损害能够产生时变磁场，该时变磁场能够激发该区域的子区域中的核，并且能够接收来自所述激发的核的NMR信号， 从其产生NMR电信号; 其中所述多个磁场源包括在相差大于10度且小于170度的方向上磁化的相邻静磁场源。

公开(公告)号：US4949041A

公开(公告)日：1990-08-14

申请号：US300980

申请日：1989-01-24

申请人： Yuval Zur

发明人： Yuval Zur

IPC分类号： G01R33/561 ,  G01R33/567

CPC分类号： G01R33/56316 ,  G01R33/56509 ,  G01R33/5635

摘要： Motion insensitive magnetic resonance scanning is provided when generating a signal from spins of a selected portion of a subject by acquiring a truncated signal comprising most of the signal's central portion and one wing of the usual two wings. Full image data is obtained by conjugating the truncated signal. The image thus obtained is relatively motion insensitive.

摘要翻译： 当通过获取包括通常的两个翼的信号的大部分中心部分和一个翼的截断信号来产生来自受试者的选定部分的旋转的信号时，提供运动不敏感磁共振扫描。 通过将截断信号共轭获得全图像数据。 由此获得的图像相对运动不敏感。

公开(公告)号：US06714807B2

公开(公告)日：2004-03-30

申请号：US09896764

申请日：2001-06-29

申请人： Yuval Zur

发明人： Yuval Zur

IPC分类号： A61B5055

CPC分类号： G01R33/5613

摘要： A method for performing MRI, including imposing N sets of steady-state free precession (SSFP) sequences on an object to be imaged, the sequences including respective initial radio-frequency (RF) excitation pulses, each initial RF excitation pulse having a predetermined phase shift relative to the other initial RF excitation pulses. N is a whole number larger than one and less than six. The method further includes setting the phase shift of the RF pulse of the sequences so that the phase shift of the RF pulse of an Mth sequence is substantially equal to 2 ⁢ π ⁡ ( M - 1 ) N radians, wherein M is a whole number larger than 0 and less than or equal to N, receiving a respective set of image signals from the object responsive to the N sets of SSFP sequences, and processing the set of received image signals to generate an image of the object.

摘要翻译： 一种用于执行MRI的方法，包括在待成像对象上施加N组稳态自由进动（SSFP）序列，所述序列包括相应的初始射频（RF）激励脉冲，每个初始RF激励脉冲具有预定相位 相对于其他初始RF激励脉冲移位。 N是大于1且小于6的整数。 该方法还包括设置序列的RF脉冲的相移，使得M个序列的RF脉冲的相移基本上相等于toradians，其中M是大于0且小于或等于0的整数 到N，响应于N组SSFP序列从对象接收相应的一组图像信号，以及处理所接收的图像信号的集合以生成对象的图像。

公开(公告)号：US06275040B1

公开(公告)日：2001-08-14

申请号：US09313413

申请日：1999-05-18

申请人： Yuval Zur

发明人： Yuval Zur

IPC分类号： G01V300

CPC分类号： G01R33/446

摘要： A method of selective excitation of a first spectral band in the presence of a second spectral band whose magnetization vector is not to be affected, comprising: selecting a central synthesizer frequency of substantially the second spectral band; applying a spectral-spatial pulse, centered on the selected synthesizer frequency to selectively excite the first spectral band. Preferably, the spectral-spatial pulse is a type II spectral-spatial pulse having odd and even pulse trains.

摘要翻译： 一种在存在不影响其磁化矢量的第二光谱带的情况下对第一光谱带进行选择性激励的方法，包括：选择基本上第二光谱带的中心合成器频率;施加以 选择的合成器频率来选择性地激发第一光谱带。 优选地，频谱空间脉冲是具有奇数和偶数脉冲序列的II型频谱空间脉冲。

公开(公告)号：US5842989A

公开(公告)日：1998-12-01

申请号：US619003

申请日：1996-03-21

申请人： Yuval Zur

发明人： Yuval Zur

IPC分类号： A61B5/0456 ,  A61B5/055

CPC分类号： A61B5/055 ,  A61B5/0456 ,  A61B5/7285

摘要： A magnetic resonance angiography method for acquiring angiographic images using any or all of three different types of selective presaturation pulses to the particular parts of the body for enhancing vascular imaging. The three types are: 1) an inversion pulse applied prior to the application of a burst of RF pulses used for tipping the spins designed to eliminate signals from unwanted blood entering the field of view being imaged, 2) inversion pulses applied between the first inversion pulse and the first of the Rf pulses used to suppress blood not properly suppressed by the first type of suppression pulses, such as fast flowing blood, and 3) saturation pulses applied within the burst of RF pulses to suppress signals from slow flowing blood when in the 2D acquisition mode. Special heart and breath gating methods are also described that enable good compromises between image quality and scan time.

摘要翻译： 一种磁共振血管造影方法，用于使用用于增强血管成像的身体的特定部分的三种不同类型的选择性预饱和脉冲中的任何一种或全部获取血管造影图像。 这三种类型是：1）在施加用于翻转自旋的RF脉冲的突发之前施加的反转脉冲，其被设计为消除进入被成像的视野的不需要的血液的信号，2）在第一反转之间施加的反转脉冲 脉冲和用于抑制由第一类抑制脉冲（例如快速流动的血液）不适当地抑制血液的Rf脉冲的第一个，以及3）在RF脉冲的脉冲串内施加的饱和脉冲，以在来自缓慢流动的血液时抑制信号 2D采集模式。 还描述了特殊的心脏和呼吸门控方法，其能够在图像质量和扫描时间之间进行良好的折衷。

公开(公告)号：US4950991A

公开(公告)日：1990-08-21

申请号：US359488

申请日：1989-05-31

申请人： Yuval Zur

发明人： Yuval Zur

IPC分类号： G01R33/54 ,  A61B5/055 ,  G01R33/32 ,  G01R33/56 ,  G01R33/565 ,  G01R33/567

CPC分类号： G01R33/56 ,  G01R33/56545 ,  G01R33/5676

摘要： The Gibb's artifact in magnetic resonance images is reduced by asymmetrically sampling acquired F.I.D. signals to obtain data, time domain filtering the obtained data with a filter that reduces overshoot, degrades resolution but increases SNR. Then obtaining symmetrical data by complex conjugating the time domain filtered data which improves the resolution, compresses the overshoot, but decreases SNR. Processing the symmetrical data to obtain images with insignificant Gibb's artifacts.

摘要翻译： Gibb的磁共振图像中的神器通过非对称采样获得的F.I.D. 获得数据的信号，用减少过冲的滤波器对获得的数据进行时域滤波，降低分辨率，但是增加SNR。 然后通过对提高分辨率的时域滤波数据进行复共轭获得对称数据，压缩过冲，但降低SNR。 处理对称数据以获得具有微不足道Gibb文物的图像。

公开(公告)号：US4825161A

公开(公告)日：1989-04-25

申请号：US119483

申请日：1987-11-12

申请人： Daniel Barnea ,  Saul Stokar ,  Yuval Zur ,  Noam Kaplan ,  Amir Ban

发明人： Daniel Barnea ,  Saul Stokar ,  Yuval Zur ,  Noam Kaplan ,  Amir Ban

IPC分类号： G01R33/28 ,  A61B5/055 ,  A61B10/00 ,  G01R33/32 ,  G01R33/54 ,  G01R33/56 ,  G01R33/20

CPC分类号： G01R33/56 ,  G01R33/5608

摘要： Improved T2 values and signal to noise ratio obtained by magnetic resonance image synthesization. Each measured echo signal intensity is divided by a correcting factor that is a function of the echo number to obtain corrected echo signal intensity. A characteristic curve is best fitted to the corrected intensity values and the intensity values of the curve are used.

摘要翻译： 通过磁共振图像合成获得的改进的T2值和信噪比。 每个测量的回波信号强度除以作为回波数的函数的校正因子以获得校正的回波信号强度。 特征曲线最适合校正的强度值，并使用曲线的强度值。

公开(公告)号：US20070247151A1

公开(公告)日：2007-10-25

申请号：US11379395

申请日：2006-04-20

申请人： Yuval Zur

发明人： Yuval Zur

IPC分类号： G01V3/00

CPC分类号： G01R33/5616 ,  G01R33/56518 ,  G01R33/56554 ,  G01R33/56563

摘要： Phase and magnitude correction is performed in two dimensions to reduce ghosting in single shot and multi-shot EPI scans. First, a phase/magnitude correction in the readout direction is carried out to reduce echo shifts and gradient waveform distortions. Then, a two dimensional phase/magnitude correction is performed to remove the remaining xy phase/magnitude errors.

摘要翻译： 相位和幅度校正在二维中执行，以减少单次和多次EPI扫描中的重影。 首先，进行读出方向的相位/幅度校正，以减少回波偏移和梯度波形失真。 然后，执行二维相位/幅度校正以消除剩余的xy相位/幅度误差。

公开(公告)号：US07054675B2

公开(公告)日：2006-05-30

申请号：US10059814

申请日：2002-01-30

申请人： Jingfei Ma ,  Yuval Zur

发明人： Jingfei Ma ,  Yuval Zur

IPC分类号： A61B5/55

CPC分类号： G01R33/4838

摘要： Artifacts in MR images caused by signals emanating from outside the design spherical volume (DSV) of the system are suppressed using customized spatial saturation pulse sequences interleaved with imaging pulse sequences. The spatial saturation pulse sequences are each customized to a specific region and are stored in a library for selective use when needed to suppress artifact producing signals emanating from specific regions outside the DSV.