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91. 发明授权

US5103092A Method and apparatus for detecting X-ray radiation 失效
标题翻译：用于检测X射线辐射的方法和装置
公开(公告)号：US5103092A
公开(公告)日：1992-04-07
申请号：US577032
申请日：1990-09-04
申请人： Tetsuhiko Takahashi , Manabu Nakagawa , Toshihiko Shimizu
发明人： Tetsuhiko Takahashi , Manabu Nakagawa , Toshihiko Shimizu
IPC分类号： G01T7/00 , A61B6/03 , G01K7/01 , G01T1/20
CPC分类号： G01K7/01
摘要： A method of and apparatus for radiation detection including temperature control so that the temperature of the radiation detector, which includes a photodiode with a leakage current of 0.4-18 pA, is controlled to a setup temperature plus or minus 0.35.degree. C. With this condition established, offset data and reference data of the detector are collected in the absence of a body under test, offset data immediately before an actual signal measurement is collected and thereafter signal data through the exposure of a body under test is collected. The collected data are subjected to sensitivity calibration and offset calibration, thereby to obtain projection data, and image data is obtained through image processing of the projection data.
摘要翻译：包括温度控制的辐射检测方法和装置，使得包括具有0.4-18pA泄漏电流的光电二极管的辐射检测器的温度被控制到设定温度加或减0.35℃。在这种条件下在没有被测体的情况下收集检测器的建立的偏移数据和参考数据，在收集实际信号测量之前立即偏移数据，并且此后收集被测体内暴露的信号数据。收集的数据进行灵敏度校准和偏移校准，从而获得投影数据，并且通过投影数据的图像处理获得图像数据。

92. 发明授权

US4937454A Radiation detector 失效
标题翻译：辐射检测器
公开(公告)号：US4937454A
公开(公告)日：1990-06-26
申请号：US273572
申请日：1988-11-21
申请人： Haruo Itoh , Toshikazu Shimada , Shin-ichi Muramatsu , Tetsuhiko Takahashi , Hiroshi Takeuchi
发明人： Haruo Itoh , Toshikazu Shimada , Shin-ichi Muramatsu , Tetsuhiko Takahashi , Hiroshi Takeuchi
IPC分类号： G01T1/20 , G01J1/02 , G01T1/24 , H01L31/0224 , H01L31/0232 , H01L31/0272 , H01L31/09 , H01L31/10 , H01L31/105
CPC分类号： H01L31/02322 , H01L31/022466 , H01L31/0272 , H01L31/1055
摘要： In a radiation detector having a scintillator and a photodiode in combination, an amorphous silicon diode of a refractive index of 3.5 or below is used for a photodector to have a decreased junction capacitance. This shifts the spectral sensitivity characteristic of the photodetector toward the short wavelength side, thus providing a low-noise, high-sensitivity radiation detector matched well with the emission spectrum of the scintillator.
摘要翻译：在具有闪烁体和光电二极管的放射线检测器中，折射率为3.5以下的非晶硅二极管用于光电转换器以具有降低的结电容。这将光电检测器的光谱灵敏度特性转移到短波长侧，从而提供与闪烁体的发射光谱良好匹配的低噪声，高灵敏度的辐射探测器。

93. 发明授权

US09714994B2 Magnetic resonance imaging apparatus, and method for correcting measurement-space coordinates 有权
公开(公告)号：US09714994B2
公开(公告)日：2017-07-25
申请号：US13881207
申请日：2011-10-28
申请人： Masahiro Takizawa , Tetsuhiko Takahashi , Miyuki Kawamura
发明人： Masahiro Takizawa , Tetsuhiko Takahashi , Miyuki Kawamura
IPC分类号： G01V3/00 , G01R33/48 , G01R33/565 , G01R33/28
CPC分类号： G01R33/48 , G01R33/28 , G01R33/4824 , G01R33/56572
摘要： In order to approximate the gradient magnetic field pulse waveform shape with high accuracy and improve the image quality at the time of imaging cross-section change or oblique imaging, an MRI apparatus of the present invention divides the waveform shape of the gradient magnetic field pulse into a plurality of sections, defines an approximation function for each section, and corrects the k-space coordinates at which the echo signal is arranged using the parameter of the approximation function. In addition, an optimal parameter of the approximation function of the waveform shape of the gradient magnetic field pulse is searched for using the measured signal.

94. 发明授权

US08896311B2 Measurement device and measurement method 有权
标题翻译：测量装置及测量方法
公开(公告)号：US08896311B2
公开(公告)日：2014-11-25
申请号：US13258743
申请日：2010-03-25
申请人： Hideo Utsumi , Kazuhiro Ichikawa , Tetsuhiko Takahashi
发明人： Hideo Utsumi , Kazuhiro Ichikawa , Tetsuhiko Takahashi
IPC分类号： G01V3/00 , A61B5/055 , G01R33/563 , G01R33/60 , G01R33/48 , G01R33/565 , G01R33/38 , G01R33/44
CPC分类号： G01R33/4808 , A61B5/055 , A61B5/0555 , G01R33/3806 , G01R33/445 , G01R33/56383 , G01R33/56509 , G01R33/60
摘要： A measuring instrument and a measurement method which measures, using magnetic resonance, images such as a functional image, a morphologic image of an object to be measured eliminate the influences of the moving speed of the object to be measured during moving, thereby obtaining a precise measured image. The instrument comprises: the first and second external magnetic field generation devices which generate magnetic fields for exciting the magnetic resonance of a mouse (M) as a living body to be measured; a turntable which rotates and moves the mouse (M) as an object to be measured, thereby moving the mouse (M) in the magnetic fields of the first and second external magnetic field generation devices; an OMRI measurement processing unit and an MRI measurement processing unit which obtain measured image signals within the mouse (M) by phase encoding while applying a gradient magnetic field in the moving direction (y) of the mouse (M) without stopping during the movement by the turntable; and a measured signal correction unit which corrects the measured image signal (S (k., ky)), thereby obtaining a corrected image signal (S′ (k., ky)) wherein influence of movement in y-direction is corrected.
摘要翻译：使用磁共振测量功能图像，待测量对象的形态图像的测量仪器和测量方法消除了移动期间被测量物体的移动速度的影响，从而获得精确的测量图像。仪器包括：第一和第二外部磁场产生装置，其产生用于激发作为要测量的活体的鼠标（M）的磁共振的磁场; 旋转并移动作为测量对象的鼠标（M）的转台，从而在第一和第二外部磁场产生装置的磁场中移动鼠标（M）; OMRI测量处理单元和MRI测量处理单元，其通过相位编码获得鼠标（M）内的测量图像信号，同时在移动期间不停止地在鼠标（M）的移动方向（y）上施加梯度磁场，转盘; 以及校正测量图像信号（S（k，ky））的测量信号校正单元，从而获得校正了在y方向上的移动影响的校正图像信号（S'（k，ky））。

95. 发明授权

US08594766B2 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：US08594766B2
公开(公告)日：2013-11-26
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： A61B5/05
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。

96. 发明申请

US20130207654A1 MAGNETIC RESONANCE IMAGING APPARATUS, METHOD FOR CORRECTING MEASUREMENT-SPACE COORDINATES, AND IMAGE RECONSTRUCTION METHOD 有权
标题翻译：磁共振成像装置，校正测量空间坐标的方法和图像重建方法
公开(公告)号：US20130207654A1
公开(公告)日：2013-08-15
申请号：US13881207
申请日：2011-10-28
申请人： Masahiro Takizawa , Tetsuhiko Takahashi , Miyuki Kawamura
发明人： Masahiro Takizawa , Tetsuhiko Takahashi , Miyuki Kawamura
IPC分类号： G01R33/48 , G01R33/28
CPC分类号： G01R33/48 , G01R33/28 , G01R33/4824 , G01R33/56572
摘要： In order to approximate the gradient magnetic field pulse waveform shape with high accuracy and improve the image quality at the time of imaging cross-section change or oblique imaging, an MRI apparatus of the present invention divides the waveform shape of the gradient magnetic field pulse into a plurality of sections, defines an approximation function for each section, and corrects the k-space coordinates at which the echo signal is arranged using the parameter of the approximation function. In addition, an optimal parameter of the approximation function of the waveform shape of the gradient magnetic field pulse is searched for using the measured signal.
摘要翻译：为了以高精度近似梯度磁场脉冲波形形状，并且在成像截面变化或倾斜成像时提高图像质量，本发明的MRI装置将梯度磁场脉冲的波形形状分为多个部分定义每个部分的近似函数，并且使用近似函数的参数来校正排列回波信号的k空间坐标。此外，使用测量信号搜索梯度磁场脉冲的波形形状的近似函数的最佳参数。

97. 发明申请

US20130049753A1 MAGNETIC RESONANCE IMAGING APPARATUS 有权
标题翻译：磁共振成像装置
公开(公告)号：US20130049753A1
公开(公告)日：2013-02-28
申请号：US13642573
申请日：2011-04-20
申请人： Yo Taniguchi , Yoshitaka Bito , Tetsuhiko Takahashi , Takenori Murase
发明人： Yo Taniguchi , Yoshitaka Bito , Tetsuhiko Takahashi , Takenori Murase
IPC分类号： G01R33/56
CPC分类号： A61B5/055 , A61B5/0042 , A61B2576/026 , G01R33/5608 , G01R33/5613 , G06T5/009 , G06T2207/10088
摘要： The present invention provides an image processing technique which enables various contrast control, by quantitatively handling a degree of phase enhancement in a contrast control as a post-processing of the image reconstruction. A complex operation is performed on each pixel value of a complex image obtained by an MRI, thereby generating an image with desired contrast. Intensity is controlled by increasing or decreasing the argument of the pixel value of each pixel by a constant amount, and the degree of phase enhancement is controlled by multiplying the phase (argument) of each pixel by a constant.
摘要翻译：本发明提供一种图像处理技术，其能够通过定量地处理对比度控制中的相位增强程度来进行各种对比度控制，作为图像重构的后处理。对通过MRI获得的复合图像的每个像素值执行复杂操作，从而生成具有期望对比度的图像。通过将每个像素的像素值的自变量增加或减小恒定量来控制强度，并且通过将每个像素的相位（自变量）乘以常数来控制相位增强的程度。

98. 发明授权

US08207734B2 Parallel imaging in non-cartesian magnetic resonance imaging (MRI) and MRI apparatus realizing the same 有权
标题翻译：并行成像在非笛卡尔磁共振成像（MRI）和MRI设备中实现相同
公开(公告)号：US08207734B2
公开(公告)日：2012-06-26
申请号：US12529396
申请日：2008-03-03
申请人： Tetsuhiko Takahashi , Masahiro Takizawa , Yasuhiro Kamada
发明人： Tetsuhiko Takahashi , Masahiro Takizawa , Yasuhiro Kamada
IPC分类号： G01V3/00
CPC分类号： G01R33/5611 , G01R33/4824 , G01R33/5615
摘要： An MRI apparatus capable of performing a high-speed operation for removing aliasing from the data measured by non-Cartesian imaging in a real space with a small amount of operation is provided. Non-Cartesian data sampling is performed by thinning the number of data by using multiple receiver coils having different sensitivity distribution from each other. Image reconstruction means creates orthogonal data by gridding non-orthogonal data obtained by each receiver coil on a grid having an equal spatial resolution to and a narrower field of view than a target image, subjects it to Fourier transform and creates the first image data containing aliasing components. The second image data is created by using the first image data created for each receiver coil and a sensitivity distribution of each receiver coil.
摘要翻译：提供了一种MRI装置，其能够执行用于以少量操作在实际空间中通过非笛卡尔成像测量的数据去除混叠的高速操作。通过使用具有彼此不同的灵敏度分布的多个接收器线圈来稀疏数据来执行非笛卡尔数据采样。图像重建装置通过网格化由每个接收器线圈获得的非正交数据在具有与目标图像相等的空间分辨率和较窄视场的网格上产生正交数据，使其进行傅里叶变换，并创建包含混叠的第一图像数据组件。通过使用为每个接收器线圈创建的第一图像数据和每个接收器线圈的灵敏度分布来创建第二图像数据。

99. 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。

100. 发明授权

US07944209B2 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：US07944209B2
公开(公告)日：2011-05-17
申请号：US12295160
申请日：2007-03-12
申请人： Takayuki Abe , Tetsuhiko Takahashi
发明人： Takayuki Abe , Tetsuhiko Takahashi
IPC分类号： G01V3/00
CPC分类号： G01R33/56375 , A61B5/055 , G01R33/243 , G01R33/543 , G01R33/56383 , G01R33/56563 , G01R33/58
摘要： A magnetic resonance imaging apparatus is configured to generate a correcting magnetic field for correcting a static magnetic field, based on a first set of information representing an inhomogeneous distribution of the static magnetic field generated depending on the characteristic of the static magnetic field generating means, a second set of information representing an inhomogeneous distribution of the static magnetic field generated depending on the tissue of the object, a third set of information corresponding to a set field of view for imaging in a desired region of the object.
摘要翻译：磁共振成像装置被配置为基于表示根据静磁场产生装置的特性产生的静磁场的不均匀分布的第一组信息来产生用于校正静磁场的校正磁场，第二组信息，其表示根据对象的组织产生的静态磁场的不均匀分布;第三组信息对应于用于在对象的期望区域成像的设定视野。

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