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1. 发明申请

US20110200243A1 MAGNETIC RESONANCE IMAGING APPARATUS AND METHOD 审中-公开
标题翻译：磁共振成像装置及方法
公开(公告)号：US20110200243A1
公开(公告)日：2011-08-18
申请号：US13124527
申请日：2009-10-13
申请人： Masahiro Takizawa , Tetsuhiko Takahashi , Masayuki Isobe , Chang Beom Ahn , Jeong-IL Park
发明人： Masahiro Takizawa , Tetsuhiko Takahashi , Masayuki Isobe , Chang Beom Ahn , Jeong-IL Park
IPC分类号： G06K9/20
CPC分类号： G01R33/4824 , G01R33/56518 , G01R33/56572
摘要： Disclosed is a magnetic resonance imaging apparatus comprising static magnetic field generation means, gradient magnetic field generation means, high-frequency magnetic field generation means, reception means, signal processing means, and control means which controls the gradient magnetic field generation means, the high-frequency magnetic field generation means, the reception means, and the signal processing means, wherein said apparatus comprises: approximation means that approximates the output error of the gradient magnetic field using a combination of multiple parameter values with respect to each direction of the gradient magnetic field; evaluation means that evaluates the combinations of multiple parameter values based on the image quality of a magnetic resonance image that is reconstructed while taking into account the output error of the gradient magnetic field that has been approximated by the approximation means; and determination means that, based on the result of the evaluation by the evaluation means, determines a desired combination among the combinations of multiple parameter values.
摘要翻译：公开了一种磁共振成像装置，包括静磁场产生装置，梯度磁场产生装置，高频磁场产生装置，接收装置，信号处理装置和控制梯度磁场产生装置的控制装置，频率磁场产生装置，接收装置和信号处理装置，其中所述装置包括：近似装置，其使用相对于梯度磁场的每个方向的多个参数值的组合近似梯度磁场的输出误差 ; 评估装置，其基于重构的磁共振图像的图像质量来评估多个参数值的组合，同时考虑已经由近似装置近似的梯度磁场的输出误差; 并且确定意味着基于评估装置的评估结果确定多个参数值的组合之间的期望组合。

2. 发明授权

US08594767B2 Magnetic resonance imaging apparatus and magnetic resonance imaging method 有权
标题翻译：磁共振成像装置和磁共振成像方法
公开(公告)号：US08594767B2
公开(公告)日：2013-11-26
申请号：US12523343
申请日：2008-02-01
申请人： Masahiro Takizawa , Tetsuhiko Takahashi
发明人： Masahiro Takizawa , Tetsuhiko Takahashi
IPC分类号： A61B5/05
CPC分类号： A61B5/055 , A61B5/7285 , G01R33/5616 , G01R33/56375 , G01R33/56383 , G01R33/5673
摘要： When multiple types of imaging are performed while moving a table on which a subject to be examined is placed, an imaging efficiency is improved and a high-quality image is obtained within a short time. Therefore, within a predetermined time interval such as an identical period of a periodic living body motion, a predetermined number of echo signals from each of the multiple types of imaging sequences are acquired and the table on which the subject to be examined is placed is moved. Along with the movement of the table, data items within the same range in the Ky-direction as to each of the imaging sequences are acquired, the moving speed of the table is controlled in such a manner that the acquired data items become continuous in the x-direction, and images are reconstructed based on the data items obtained respectively from the imaging sequences.
摘要翻译：当在移动要被检查对象的表格的同时执行多种类型的成像时，提高成像效率并且在短时间内获得高质量图像。因此，在诸如周期性生物体运动的相同周期的预定时间间隔内，获取来自多种类型的成像序列中的每一种的预定数量的回波信号，并且移动放置被检查对象的表。随着桌子的移动，获取与每个成像序列相同的Ky方向上的数据项，表格的移动速度被控制成使获取的数据项在 x方向，并且基于从成像序列分别获得的数据项重建图像。

3. 发明申请

US20120141007A1 MAGNETIC RESONANCE IMAGING APPARATUS AND SYNCHRONOUS MEASUREMENT METHOD 有权
标题翻译：磁共振成像装置和同步测量方法
公开(公告)号：US20120141007A1
公开(公告)日：2012-06-07
申请号：US13389620
申请日：2010-08-02
申请人： Masahiro Takizawa , Tetsuhiko Takahashi , Tomohiro Goto , Takayuki Abe
发明人： Masahiro Takizawa , Tetsuhiko Takahashi , Tomohiro Goto , Takayuki Abe
IPC分类号： G06K9/00
CPC分类号： A61B5/055 , A61B5/0402 , A61B5/0816 , A61B5/7207 , A61B5/7285 , G01R33/482 , G01R33/4824 , G01R33/5617 , G01R33/5673
摘要： An image with a desired contrast is obtained while suppressing body motion artifacts caused by both random motion and periodic motion of an object. In order to do so, an imaging sequence using a non-Cartesian sampling method is executed so as to synchronize with a biological signal only at the start time and a repetition time (TR), which is an execution interval between shots within the imaging sequence, is maintained. In addition, a time difference between a delay time and a start time of each shot is calculated, and a shot with a predetermined time difference or more is executed again after the TR time.
摘要翻译：获得具有期望对比度的图像，同时抑制由对象的随机运动和周期性运动引起的身体运动伪影。为了这样做，执行使用非笛卡尔采样方法的成像序列，以便仅在开始时与生物信号同步，并且重复时间（TR）是成像序列内的拍摄之间的执行间隔，维持。此外，计算出每个镜头的延迟时间和开始时间之间的时间差，并且在TR时间之后再次执行具有预定时间差的镜头。

4. 发明申请

US20100164495A1 MAGNETIC RESONANCE IMAGING APPARATUS AND METHOD FOR CORRECTING ERROR DUE TO GRADIENT MAGNETIC FIELD 有权
标题翻译：用于校正梯度磁场的误差的磁共振成像装置和方法
公开(公告)号：US20100164495A1
公开(公告)日：2010-07-01
申请号：US12601378
申请日：2008-06-03
申请人： Masahiro Takizawa , Tetsuhiko Takahashi
发明人： Masahiro Takizawa , Tetsuhiko Takahashi
IPC分类号： G01R33/48 , G01R33/565
CPC分类号： G01R33/56518 , G01R33/482 , G01R33/4824 , G01R33/561
摘要： In a non-cartesian sampling method, in order to reduce an artifact on an image caused by an error of a gradient magnetic field, data for correcting the error caused by the gradient magnetic field are obtained when data used for image reconstruction are obtained, and the data used for the image reconstruction are corrected by using the obtained data for the correction. In order to obtain the data for correcting the error, a block having plural parallel echo signals is measured.
摘要翻译：在非笛卡尔采样方法中，为了减少由梯度磁场的误差引起的图像上的伪像，获得用于图像重建的数据获得用于校正由梯度磁场引起的误差的数据，以及通过使用获得的校正数据来校正用于图像重建的数据。为了获得用于校正误差的数据，测量具有多个并行回波信号的块。

5. 发明申请

US20090177078A1 MAGNETIC RESONANCE IMAGING APPARATUS AND METHOD 有权
标题翻译：磁共振成像装置及方法
公开(公告)号：US20090177078A1
公开(公告)日：2009-07-09
申请号：US12278237
申请日：2007-02-01
申请人： Masahiro Takizawa , Tetsuhiko Takahashi
发明人： Masahiro Takizawa , Tetsuhiko Takahashi
IPC分类号： A61B5/055
CPC分类号： G01R33/56375 , A61B5/055 , A61B5/7207 , A61B5/7257 , G01R33/5615 , G01R33/5616 , G01R33/5617 , G01R33/56383
摘要： In the continuous moving table imaging, high-speed imaging such as the echo planar method is implemented without deteriorating image quality, realizing a high-speed table movement, namely, high-speed imaging.In the magnetic resonance imaging apparatus, an imaging control means for controlling a magnetic field generation means, a transfer means, and a signal processing means executes an imaging sequence for applying multiple readout gradient magnetic fields to measure multiple nuclear magnetic resonance signals, after one-time application of an exciting RF pulse, while moving the transfer means. On this occasion, a positional deviation of the readout gradient magnetic fields given to the multiple nuclear magnetic resonance signals, caused by the movement of the transfer means, is calculated in advance as correction data, so that the measured nuclear magnetic resonance signals are corrected by the correction data.
摘要翻译：在连续移动台成像中，采用回波平面方式的高速成像，而不会降低图像质量，实现高速表移动，即高速成像。在磁共振成像装置中，用于控制磁场产生装置，传送装置和信号处理装置的成像控制装置执行用于施加多个读出梯度磁场以测量多个核磁共振信号的成像序列，在移动传送装置的同时应用激发的RF脉冲。在这种情况下，预先计算由转印装置的移动引起的给予多个核磁共振信号的读出梯度磁场的位置偏差作为校正数据，以便测量的核磁共振信号由校正数据。

6. 发明授权

US07486076B2 Magnetic resonance imaging apparatus and method with adjustment in positioning within imaging space to correct deviation from desired position 有权
标题翻译：磁共振成像装置和方法，其调整成像空间内的定位以校正与期望位置的偏差
公开(公告)号：US07486076B2
公开(公告)日：2009-02-03
申请号：US11662108
申请日：2005-09-02
申请人： Hisako Nagao , Takayuki Abe , Tetsuhiko Takahashi , Masahiro Takizawa
发明人： Hisako Nagao , Takayuki Abe , Tetsuhiko Takahashi , Masahiro Takizawa
IPC分类号： G01V3/00
CPC分类号： A61B5/055 , G01R33/56375
摘要： An MRI apparatus and method are provided which are capable of properly setting imaging position of regions of a subject on a table and moving the table to the set positions, for imaging a wide range or the entire body range of the subject.
摘要翻译：提供了一种MRI装置和方法，其能够将桌子上的区域的成像位置适当地设置在桌子上并将桌子移动到设定位置，以对被摄体的宽范围或整个身体范围进行成像。

7. 发明申请

US20050033150A1 Medicinal composition 有权
标题翻译：药用成分
公开(公告)号：US20050033150A1
公开(公告)日：2005-02-10
申请号：US10489069
申请日：2002-09-13
申请人： Tetsuhiko Takahashi , Masahiro Takizawa
发明人： Tetsuhiko Takahashi , Masahiro Takizawa
IPC分类号： G01R33/34 , A61B5/055 , A61P1/14 , C07D207/14 , G01R33/3415 , G01R33/561 , A61B5/05
CPC分类号： A61K31/40 , C07D207/14 , G01R33/3415 , G01R33/3806 , G01R33/5611
摘要： An RF receiving means, which comprise respective at least three RF receiving coils (203, 201 (or 202), 204), (205, 202 (or 201), 206), (207, 201 (or 202), 208) disposed in at least two orthogonal directions (x, y, z), are set to a patient 209, any one direction (x) of the two directions is set as a phase encoding direction, magnetic resonance signals are measured by executing a pulse sequence while thinning phase encoding steps, and the aliasing of an image is eliminated by an arithmetic operation executed using the magnetic resonance signals measured by at least the three RF receiving coils (205, 202 (or 201), 206) disposed in the thus set phase encoding direction and using the sensitivity distributions of the respective RF receiving coils.
摘要翻译： RF接收装置包括相应的至少三个RF接收线圈（203,201（或202），204），（205,202（或201），206），（207,201（或202），208）在至少两个正交方向（x，y，z）被设置为患者209时，两个方向的任何一个方向（x）被设置为相位编码方向，通过执行脉冲序列来测量磁共振信号，同时通过使用由设置在如此设置的相位编码中的至少三个RF接收线圈（205,202（或201），206）测量的磁共振信号执行的算术运算来消除图像的混叠相位编码步骤，并且图像的混叠消除方向并使用相应RF接收线圈的灵敏度分布。

8. 发明申请

US20110245655A1 MAGNETIC RESONANCE IMAGING APPARATUS AND PULSE SEQUENCE ADJUSTING METHOD 审中-公开
标题翻译：磁共振成像装置和脉冲序列调整方法
公开(公告)号：US20110245655A1
公开(公告)日：2011-10-06
申请号：US13139041
申请日：2009-12-22
申请人： Takayuki Abe , Masahiro Takizawa , Tetsuhiko Takahashi
发明人： Takayuki Abe , Masahiro Takizawa , Tetsuhiko Takahashi
IPC分类号： A61B5/055
CPC分类号： G01R33/565 , G01R33/4816 , G01R33/4833
摘要： When executing an imaging pulse sequence using a high frequency magnetic field pulse with a partial waveform of a predetermined waveform, an application start time of a slice gradient magnetic field applied simultaneously with the high frequency magnetic field pulse is corrected. Specifically, a magnetic resonance signal for correcting the imaging pulse sequence is acquired by executing a prescan sequence using a high frequency magnetic field pulse with a predetermined waveform, an application start time of a slice selection gradient magnetic field in the imaging pulse sequence is corrected using the magnetic resonance signal for correction, and the imaging pulse sequence is executed by applying the slice selection gradient magnetic field with the corrected application start time.
摘要翻译：当使用具有预定波形的部分波形的高频磁场脉冲执行成像脉冲序列时，校正与高频磁场脉冲同时施加的切片梯度磁场的施加开始时间。具体地，通过使用具有预定波形的高频磁场脉冲执行预扫描序列来获取用于校正成像脉冲序列的磁共振信号，使用成像脉冲序列中的切片选择梯度磁场的施加开始时间来校正使用用于校正的磁共振信号和成像脉冲序列通过应用具有校正的应用开始时间的切片选择梯度磁场来执行。

9. 发明授权

US08032201B2 Magnetic resonance imaging device 失效
标题翻译：磁共振成像装置
公开(公告)号：US08032201B2
公开(公告)日：2011-10-04
申请号：US11917689
申请日：2006-06-15
申请人： Yo Taniguchi , Hisaaki Ochi , Tetsuhiko Takahashi , Masahiro Takizawa
发明人： Yo Taniguchi , Hisaaki Ochi , Tetsuhiko Takahashi , Masahiro Takizawa
IPC分类号： A61B5/05
CPC分类号： G01R33/56375 , A61B5/055 , A61B6/5241 , G01R33/5608 , G01R33/56383 , G06T3/0075
摘要： The magnetic resonance imaging apparatus includes a control unit for controlling a pulse sequence that applies an RF magnetic field and a magnetic field gradient to a subject placed in a static magnetic field and detects a magnetic resonance signal generated from the subject, and a calculation unit for processing the signal, and the control unit performs the process including the steps of; (1) obtaining first images at different positions in a first direction, (2) obtaining images after the first images are subjected to correction of brightness distortion, (3) obtaining images after the images as to which the brightness distortion has been corrected are further subjected to correction of positional distortion, and (4) synthesizing by a weighting calculation, overlapping areas of the images, after the positional distortion thereof has been corrected. According to this magnetic resonance imaging apparatus, the positional distortion and the brightness distortion can be corrected upon connecting the images, in the multi-station imaging.
摘要翻译：磁共振成像装置包括：控制单元，用于控制对放置在静态磁场中的被摄体施加RF磁场和磁场梯度的脉冲序列，并检测从对象产生的磁共振信号;以及计算单元，处理信号，并且控制单元执行包括以下步骤的处理：（1）在第一方向上获取不同位置的第一图像，（2）在第一图像经受亮度失真校正之后获得图像，（3）获得图像之后的亮度失真已被校正的图像进一步获得进行位置失真的校正，（4）通过加权计算合成图像的重叠区域，在其位置失真被校正之后。根据该磁共振成像装置，在多台成像中，可以在连接图像时校正位置失真和亮度失真。

10. 发明申请

US20110089948A1 MAGNETIC RESONANCE IMAGING APPARATUS 有权
标题翻译：磁共振成像装置
公开(公告)号：US20110089948A1
公开(公告)日：2011-04-21
申请号：US12912385
申请日：2010-10-26
申请人： Masahiro Takizawa , Tetsuhiko Takahashi
发明人： Masahiro Takizawa , Tetsuhiko Takahashi
IPC分类号： G01R33/48
CPC分类号： G01R33/561 , G01R33/4824 , G01R33/56375 , G01R33/56383 , G01R33/56518 , G01R33/56563 , G01R33/56572
摘要： An MRI apparatus includes an imaging means being provided with a means for generating magnetic fields respectively of a static magnetic field, a gradient magnetic field, and an RF magnetic field, and a means for receiving an echo signal generated from a subject, the imaging means being for measuring echo data associated with at least one measurement trajectory in k-space, while varying angles with respect to a coordinate axis in the k-space of the measurement trajectory, so as to collect at least one measured data for each of the angles; and an image reconstruction means for rearranging the measured data in the k-space and reconstructing an image; wherein, the image reconstruction means calculates a phase for correction based on standard data selected from the measured data for each of the angles, prior to rearranging the measured data in the k-space, and performs a phase correction as to the measured data, by using the phase for correction being calculated. With the procedure above, it is possible to reduce an artifact caused by the nonlinearity of the gradient magnetic field and/or inhomogeneities of the magnetic field, without extending the imaging time.
摘要翻译： MRI装置包括成像装置，其具有分别产生静磁场，梯度磁场和RF磁场的磁场的装置，以及用于接收从被摄体产生的回波信号的装置，所述成像装置用于测量与k空间中的至少一个测量轨迹相关联的回波数据，同时相对于测量轨迹的k空间中的坐标轴改变角度，以便针对每个角度收集至少一个测量数据 ; 以及图像重建装置，用于重新排列k空间中的测量数据并重构图像; 其特征在于，所述图像重构单元在重新排列所述k空间内的测量数据之前，根据从所测量的每个角度的数据中选出的标准数据，计算出校正相位，并对所述测量数据进行相位修正，使用校正相位进行计算。通过上述过程，可以减少由梯度磁场的非线性引起的伪影和/或磁场的不均匀性，而不会延长成像时间。

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