公开(公告)号：US07332911B2

公开(公告)日：2008-02-19

申请号：US11562275

申请日：2006-11-21

申请人： Yuji Iwadate ,  Tetsuji Tsukamoto

发明人： Yuji Iwadate ,  Tetsuji Tsukamoto

IPC分类号： G01V3/00

CPC分类号： G01R33/5676 ,  G01R33/56308

摘要： The present invention provides an MRI apparatus which prevents from developing body move artifacts on the image to improve the image quality. In the navigator sequence a scan unit emits first RF pulse so as to excite first slice plane area which is out of the imaging area and is intersecting the navigator area including the epiglottis, then it emits second RF pulse so as to excite second slice plane area which is out of the imaging area and is intersecting the first slice plane area in the navigator area including the epiglottis. Thereafter a body move detector detects the displacement of epiglottis due to the deglutition movement based on the navigator echo data, a raw data selector unit selects as raw data the imaging data thus obtained in the imaging sequence based on the displacement of epiglottis, then the image of the slice plane including the esophagus in the subject is generated from the imaging data thus selected.

摘要翻译： 本发明提供一种MRI装置，其防止显影体在图像上移动伪影以提高图像质量。 在导航器序列中，扫描单元发射第一RF脉冲，以便激发位于成像区域之外且与包括会厌的导航区域相交的第一切片平面区域，然后它发射第二RF脉冲，以激发第二切片平面区域 其在成像区域之外并且与包括会厌的导航区域中的第一切片平面区域相交。 此后，身体移动检测器基于导航回波数据检测由于吞咽运动引起的会厌位移，原始数据选择器单元基于会厌位移而在成像序列中选择如此获得的成像数据作为原始数据，然后图像 包括食管在内的切片平面由这样选择的成像数据产生。

公开(公告)号：US07187174B2

公开(公告)日：2007-03-06

申请号：US11438524

申请日：2006-05-22

申请人： Yuji Iwadate ,  Tetsuji Tsukamoto

发明人： Yuji Iwadate ,  Tetsuji Tsukamoto

IPC分类号： G01V3/00

CPC分类号： G01R33/341

摘要： With a view to providing a receiving coil which permits a subject to assume a supine position when radiographing the breast of the subject, thereby improving the working efficiency, a receiving coil for receiving a magnetic resonance signal from the breast of a subject lying within a static magnetic field space is provided in each of a first cup and a second cup of a brassiere which cups receive the breast of the subject SU therein.

摘要翻译： 为了提供一种接收线圈，其允许受试者在拍摄对象的乳房时进行仰卧位置，从而提高工作效率;接收线圈，用于从位于静态内的被摄体的乳房接收磁共振信号 在第一杯和第二杯胸罩中的每一个中提供磁场空间，其中杯子容纳受试者SU的乳房。

公开(公告)号：US08290566B2

公开(公告)日：2012-10-16

申请号：US12420974

申请日：2009-04-09

申请人： Yuji Iwadate ,  Kenichi Kanda

发明人： Yuji Iwadate ,  Kenichi Kanda

IPC分类号： A61B5/05

CPC分类号： A61B5/055 ,  A61B5/0037 ,  A61B5/7257

摘要： A magnetic resonance imaging apparatus includes a first navigator data processor that generates a first phase profile based on first navigator data acquired by executing a first navigator sequence, generates a position profile indicative of a relationship between a plurality of region positions and time at which the first navigator sequence is executed, and detects a specific position in the position profile. A second navigator data processor generates a second phase profile based on second navigator data acquired by executing a second navigator sequence, detects the position of each region with respect to each second phase profile within a reference range set so as to contain the specific position, based on each second phase profile, and acquires the same as its corresponding position data.

摘要翻译： 磁共振成像装置包括：第一导航数据处理器，其基于通过执行第一导航序列获取的第一导航数据生成第一相位轮廓，生成指示多个区域位置与第一导航数据之间的关系的位置分布; 执行导航序列，并检测位置分布中的特定位置。 第二导航器数据处理器基于通过执行第二导航序列获取的第二导航器数据来产生第二相位轮廓，在参考范围集合内检测相对于每个第二相位轮廓的每个区域的位置，以便包含特定位置 并且获取与其对应的位置数据相同的第二相位轮廓。

公开(公告)号：US08264223B2

公开(公告)日：2012-09-11

申请号：US12650266

申请日：2009-12-30

申请人： Yuji Iwadate ,  Kenichi Kanda

发明人： Yuji Iwadate ,  Kenichi Kanda

IPC分类号： G01V3/00

CPC分类号： G01R33/5676 ,  G01R33/3415 ,  G01R33/543

摘要： A magnetic resonance imaging apparatus includes a scan execution unit configured to execute a regular scan in which a navigator sequence for generating a magnetic resonance signal in a navigator area containing a region of interest moving with a biological movement of a subject and an imaging sequence for generating a magnetic resonance signal in an imaging area of the subject are carried out, and a signal processing unit configured to detect a position of a region of interest based on a magnetic resonance signal generated by a navigator sequence in the regular scan and to generate an image based on the detected position and the magnetic resonance signal generated by the imaging sequence. The signal processing unit is configured to generate an intensity profile with respect to the magnetic resonance signal generated by a navigator sequence in the pre-scan and received at each of the coil elements, determine the gradient polarity of the profile line corresponding to the high-signal substance in the predetermined direction in the generated intensity profile, and to select a coil element that received a magnetic resonance signal of the intensity profile highest in maximum signal intensity among the intensity profiles the gradient polarity of which was determined to face upward. The position of the region of interest is detected based on a magnetic resonance signal generated by a navigator sequence in the regular scan and received at the selected coil element.

摘要翻译： 磁共振成像装置包括：扫描执行单元，被配置为执行常规扫描，其中，在包含感兴趣区域的导航区域中产生磁共振信号的导航序列，所述导航区域包含随着被摄体的生物运动移动的感兴趣区域，以及用于生成 执行被检体的成像区域的磁共振信号，以及信号处理部，其基于由常规扫描中的导航序列生成的磁共振信号来检测感兴趣区域的位置，并生成图像 基于由成像序列产生的检测位置和磁共振信号。 信号处理单元被配置为产生相对于由预扫描中的每个线圈元件接收的导航序列产生的磁共振信号的强度分布，确定对应于高频信号的轮廓线的梯度极性， 在所产生的强度分布中沿预定方向的信号物质，并且选择线性元件，其接收在梯度极性被确定为面向上的强度分布中最大信号强度最高的强度分布的磁共振信号。 感兴趣区域的位置是基于由常规扫描中的导航序列产生的并在所选择的线圈元件处接收的磁共振信号来检测的。

公开(公告)号：US20110074411A1

公开(公告)日：2011-03-31

申请号：US12893928

申请日：2010-09-29

申请人： Yoshihiro Tomoda ,  Yuji Iwadate

发明人： Yoshihiro Tomoda ,  Yuji Iwadate

IPC分类号： G01R33/44

CPC分类号： G01R33/5676

摘要： A magnetic resonance imaging apparatus for acquiring k-space data from a deformable imaging region of a subject and generating image data of the imaging region at the time of being deformed to a predetermined state, based on the acquired k-space data, includes a gradient coil for applying a gradient magnetic field in a phase encoding direction, and an image data calculation device for calculating a numeric value for defining a relationship between the imaging region at the time of being deformed to the predetermined state and the imaging region at an nth phase encoding and calculating image data of the imaging region at the time of being deformed to the predetermined state, based on the calculated numeric value and the k-space data acquired from the imaging region.

摘要翻译： 一种磁共振成像设备，用于从被摄体的可变形成像区域获取k空间数据，并且基于所获取的k空间数据，在变形到预定状态时生成成像区域的图像数据，包括梯度 线圈，用于在相位编码方向上施加梯度磁场;以及图像数据计算装置，用于计算用于定义变形时的成像区域与预定状态之间的关系的数值和第n阶段的成像区域 基于计算出的数值和从成像区域获取的k空间数据，将变形时的成像区域的图像数据编码和计算到预定状态。

公开(公告)号：US07759936B2

公开(公告)日：2010-07-20

申请号：US12051936

申请日：2008-03-20

申请人： Yuji Iwadate

发明人： Yuji Iwadate

IPC分类号： G01V3/00

CPC分类号： G01R33/3415 ,  G01R33/34007 ,  G01R33/3642 ,  G01R33/365

摘要： An RF coil includes a first loop coil element including a first plane closed by a first coil line and a second loop coil element including a second plane, wherein the first loop coil element and the second loop coil element move while maintaining a facing state to vary the square measure of a facing area in which the first coil plane and the second coil plane face each other. The first loop coil element includes a first spreading part having a first coil line disposed such that a distance of opposing by the first coil line parallel to a first moving direction widens in the first moving direction, in a direction normal to the first moving direction in which the movement takes place such that the square measure of the facing area increases relative to the second loop coil element in a direction parallel to the first plane.

摘要翻译： RF线圈包括第一环形线圈元件，其包括由第一线圈线封闭的第一平面和包括第二平面的第二环形线圈元件，其中第一环形线圈元件和第二环形线圈元件在保持面对状态的同时移动， 第一线圈平面和第二线圈面彼此面对的面对区域的平方度量。 第一环形线圈元件包括：第一扩展部，其具有第一线圈线，第一线圈线设置成使得与第一移动方向平行的第一线圈对置的距离在第一移动方向上沿与第一移动方向垂直的方向在 其运动发生，使得面对区域的平方尺寸相对于第二环形线圈元件在平行于第一平面的方向上增加。

公开(公告)号：US20090259120A1

公开(公告)日：2009-10-15

申请号：US12420974

申请日：2009-04-09

申请人： Yuji Iwadate ,  Kenichi Kanda

发明人： Yuji Iwadate ,  Kenichi Kanda

IPC分类号： A61B5/055

CPC分类号： A61B5/055 ,  A61B5/0037 ,  A61B5/7257

摘要： A magnetic resonance imaging apparatus includes a first navigator data processor that generates a first phase profile based on first navigator data acquired by executing a first navigator sequence, generates a position profile indicative of a relationship between a plurality of region positions and time at which the first navigator sequence is executed, and detects a specific position in the position profile. A second navigator data processor generates a second phase profile based on second navigator data acquired by executing a second navigator sequence, detects the position of each region with respect to each second phase profile within a reference range set so as to contain the specific position, based on each second phase profile, and acquires the same as its corresponding position data.

摘要翻译： 磁共振成像装置包括：第一导航数据处理器，其基于通过执行第一导航序列获取的第一导航数据生成第一相位轮廓，生成指示多个区域位置与第一导航数据之间的关系的位置分布; 执行导航序列，并检测位置分布中的特定位置。 第二导航器数据处理器基于通过执行第二导航序列获取的第二导航器数据来产生第二相位轮廓，在参考范围集合内检测相对于每个第二相位轮廓的每个区域的位置，以便包含特定位置 并且获取与其对应的位置数据相同的第二相位轮廓。

公开(公告)号：US20080211497A1

公开(公告)日：2008-09-04

申请号：US12015833

申请日：2008-01-17

申请人： Yuji Iwadate ,  Kenichi Kanda

发明人： Yuji Iwadate ,  Kenichi Kanda

IPC分类号： G01R33/48

CPC分类号： G01R33/5676

摘要： An MRI apparatus includes a navigator device for obtaining information of body motion produced by respiration of a subject by a navigator pulse sequence, and a respiration waveform display device for displaying a respiration waveform on the basis of the body motion information obtained by the navigator device.

摘要翻译： MRI装置包括导航装置，用于通过导航脉冲序列获得由对象的呼吸产生的身体运动的信息;以及呼吸波形显示装置，用于根据导航装置获得的身体运动信息显示呼吸波形。

公开(公告)号：US20070120565A1

公开(公告)日：2007-05-31

申请号：US11562275

申请日：2006-11-21

申请人： Yuji Iwadate ,  Tetsuji Tsukamoto

发明人： Yuji Iwadate ,  Tetsuji Tsukamoto

IPC分类号： G01V3/00

CPC分类号： G01R33/5676 ,  G01R33/56308

摘要： The present invention provides an MRI apparatus which prevents from developing body move artifacts on the image to improve the image quality. In the navigator sequence a scan unit emits first RF pulse so as to excite first slice plane area which is out of the imaging area and is intersecting the navigator area including the epiglottis, then it emits second RF pulse so as to excite second slice plane area which is out of the imaging area and is intersecting the first slice plane area in the navigator area including the epiglottis. Thereafter a body move detector detects the displacement of epiglottis due to the deglutition movement based on the navigator echo data, a raw data selector unit selects as raw data the imaging data thus obtained in the imaging sequence based on the displacement of epiglottis, then the image of the slice plane including the esophagus in the subject is generated from the imaging data thus selected.

摘要翻译： 本发明提供一种MRI装置，其防止显影体在图像上移动伪影以提高图像质量。 在导航器序列中，扫描单元发射第一RF脉冲，以便激发位于成像区域之外且与包括会厌的导航区域相交的第一切片平面区域，然后它发射第二RF脉冲，以激发第二切片平面区域 其在成像区域之外并且与包括会厌的导航区域中的第一切片平面区域相交。 此后，身体移动检测器基于导航回波数据检测由于吞咽运动引起的会厌位移，原始数据选择器单元基于会厌位移而在成像序列中选择如此获得的成像数据作为原始数据，然后图像 包括食管在内的切片平面由这样选择的成像数据产生。