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60 条记录 (耗时 0.025 秒)

    Magnetic resonance imaging apparatus
    41.
    发明授权
    Magnetic resonance imaging apparatus 失效
    磁共振成像装置

    公开(公告)号：US07701214B2

    公开(公告)日：2010-04-20

    申请号：US11912763

    申请日：2006-02-23

    申请人： Shinji Kurokawa ,  Yo Taniguchi ,  Hisaaki Ochi ,  Shin-ichiro Umemura

    发明人： Shinji Kurokawa ,  Yo Taniguchi ,  Hisaaki Ochi ,  Shin-ichiro Umemura

    IPC分类号： G01V3/00

    CPC分类号： G01R33/56375 ,  G01R33/56383

    摘要： When a magnetic resonance signal is received more than once, while a table (transfer unit) is moved, a gradient magnetic field is applied in the table moving direction, and an application amount (intensity and application time) of the gradient magnetic field in the table moving direction is changed every acquisition of data. As for the encoding by the gradient magnetic field in the table moving direction, a series of phase encode is performed at different positions of an examination target, unlike a conventional phase encode. Therefore, the Fourier transform cannot be applied to the image reconstruction. Given this situation, a magnetization map of total FOV of the examination target is determined in such a manner that a sum of the square of an absolute value of a difference is minimized, the difference between a received signal and a signal calculated from the magnetization map set as a variable, and then, the reconstruction is performed. Even when a size of signal acquisition area in the table moving direction is narrow, the magnetic resonance imaging apparatus of the present invention is capable of taking an image of a wide field of view at high speed, by performing the imaging while the table is moved continuously.

    摘要翻译： 当多次接收到磁共振信号时，在移动台（传送单元）的同时，在台移动方向上施加梯度磁场，并且在梯形磁场的施加量（强度和施加时间） 每次采集数据时，表移动方向都会发生变化。 对于表移动方向的梯度磁场的编码，与现有的相位编码不同，在检查对象的不同位置进行一系列的相位编码。 因此，傅里叶变换不能应用于图像重构。 考虑到这种情况，检测对象的总FOV的磁化映射以如下方式来确定，使得差的绝对值的平方和之和最小化，接收信号与从磁化映射计算的信号之间的差 设置为变量，然后进行重建。 即使当表移动方向上的信号获取区域的尺寸窄时，本发明的磁共振成像装置也能够通过在桌子移动时进行成像而以高速拍摄宽视野的图像 不断地

    Ultrasound Contrast Agent
    42.
    发明申请
    Ultrasound Contrast Agent 有权
    超声对比剂

    公开(公告)号：US20080311046A1

    公开(公告)日：2008-12-18

    申请号：US11658591

    申请日：2005-08-04

    申请人： Kenichi Kawabata ,  Nami Sugita ,  Shin-ichiro Umemura

    发明人： Kenichi Kawabata ,  Nami Sugita ,  Shin-ichiro Umemura

    IPC分类号： A61K49/22

    CPC分类号： A61K49/223

    摘要： An ultrasound contrast agent composed of at least one kind of low-boiling water-insoluble substance (with a boiling point lower than 37° C.) and at least one kind of high-boiling water-insoluble substance (with a boiling point higher than 37° C.). The former vaporizes to absorb ultrasonic energy upon application of ultrasound, thereby causing the latter to vaporize secondarily, with the resulting bubbles producing an echo image. It is less liable to bumping and hence safe.

    摘要翻译： 由至少一种低沸点水不溶性物质（沸点低于37℃）和至少一种高沸点水不溶性物质（沸点高于 37℃）。 前者在施加超声波时蒸发以吸收超声能量，从而使后者二次蒸发，产生的回波图像产生气泡。 它不太容易碰撞，因此安全。

    MAGNETIC RESONANCE IMAGING APPARATUS
    46.
    发明申请
    MAGNETIC RESONANCE IMAGING APPARATUS 失效
    磁共振成像装置

    公开(公告)号：US20090219020A1

    公开(公告)日：2009-09-03

    申请号：US11912763

    申请日：2006-02-23

    申请人： Shinji Kurokawa ,  Yo Taniguchi ,  Hisaaki Ochi ,  Shin-ichiro Umemura

    发明人： Shinji Kurokawa ,  Yo Taniguchi ,  Hisaaki Ochi ,  Shin-ichiro Umemura

    IPC分类号： A61B5/055 ,  G01R33/20

    CPC分类号： G01R33/56375 ,  G01R33/56383

    摘要： When a magnetic resonance signal is received more than once, while a table (transfer unit) is moved, a gradient magnetic field is applied in the table moving direction, and an application amount (intensity and application time) of the gradient magnetic field in the table moving direction is changed every acquisition of data. As for the encoding by the gradient magnetic field in the table moving direction, a series of phase encode is performed at different positions of an examination target, unlike a conventional phase encode. Therefore, the Fourier transform cannot be applied to the image reconstruction. Given this situation, a magnetization map of total FOV of the examination target is determined in such a manner that a sum of the square of an absolute value of a difference is minimized, the difference between a received signal and a signal calculated from the magnetization map set as a variable, and then, the reconstruction is performed. Even when a size of signal acquisition area in the table moving direction is narrow, the magnetic resonance imaging apparatus of the present invention is capable of taking an image of a wide field of view at high speed, by performing the imaging while the table is moved continuously.

    摘要翻译： 当多次接收到磁共振信号时，在移动台（传送单元）的同时，在台移动方向上施加梯度磁场，并且在梯形磁场的施加量（强度和施加时间） 每次采集数据时，表移动方向都会发生变化。 对于表移动方向的梯度磁场的编码，与现有的相位编码不同，在检查对象的不同位置进行一系列的相位编码。 因此，傅里叶变换不能应用于图像重构。 考虑到这种情况，检测对象的总FOV的磁化映射以如下方式来确定，使得差的绝对值的平方和之和最小化，接收信号与从磁化映射计算的信号之间的差 设置为变量，然后进行重建。 即使当表移动方向上的信号获取区域的尺寸窄时，本发明的磁共振成像装置也能够通过在桌子移动时进行成像而以高速拍摄宽视野的图像 不断地

    Ultrasound contrast agent
    49.
    发明授权
    Ultrasound contrast agent 有权
    超声造影剂

    公开(公告)号：US08323620B2

    公开(公告)日：2012-12-04

    申请号：US11658591

    申请日：2005-08-04

    申请人： Kenichi Kawabata ,  Nami Sugita ,  Shin-ichiro Umemura

    发明人： Kenichi Kawabata ,  Nami Sugita ,  Shin-ichiro Umemura

    IPC分类号： A61B8/00

    CPC分类号： A61K49/223

    摘要： An ultrasound contrast agent composed of at least one kind of low-boiling water-insoluble substance (with a boiling point lower than 37° C.) and at least one kind of high-boiling water-insoluble substance (with a boiling point higher than 37° C.). The former vaporizes to absorb ultrasonic energy upon application of ultrasound, thereby causing the latter to vaporize secondarily, with the resulting bubbles producing an echo image. It is less liable to bumping and hence safe.

    摘要翻译： 由至少一种低沸点水不溶性物质（沸点低于37℃）和至少一种高沸点水不溶性物质（沸点高于 37℃）。 前者在施加超声波时蒸发以吸收超声能量，从而使后者二次蒸发，产生的回波图像产生气泡。 它不太容易碰撞，因此安全。