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41. 发明授权

US06700375B2 MRI method and apparatus using independent gradient magnetic field spolier pulses 有权
标题翻译： MRI方法和装置采用独立梯度磁场spolier脉冲
公开(公告)号：US06700375B2
公开(公告)日：2004-03-02
申请号：US09734897
申请日：2000-12-13
申请人： Yoshio Machida , Satoshi Sugiura , Yoshimori Kassai
发明人： Yoshio Machida , Satoshi Sugiura , Yoshimori Kassai
IPC分类号： G01V300
CPC分类号： G01R33/5615 , G01R33/5617
摘要： In fast imaging of a multi-echo method represented by a fast spin echo (FSE) method, a pulse sequence is arranged such that a basic condition relating to a CPMG method is satisfied and a spoiler gradient magnetic field pulse is independently applied immediately after a flop pulse. The spoiler gradient magnetic field pulse for suppressing an undesired signal is applied by a predetermined amount or more so as to prevent superimposition of other gradient magnetic field components such as a phase encoding component, a rewind component, etc., and to prevent a residual component of an FID signal caused by a certain RF pulse from being refocused by a subsequent RF pulse.
摘要翻译：在由快速自旋回波（FSE）方法表示的多回波方法的快速成像中，布置脉冲序列，使得满足与CPMG方法相关的基本条件，并且扰流板梯度磁场脉冲在a 触发脉冲。用于抑制不期望信号的扰流板梯度磁场脉冲施加预定量以上，以防止诸如相位编码分量，倒带分量等的其它梯度磁场分量的叠加，并且防止残留分量由一定RF脉冲引起的由后续RF脉冲重新聚焦的FID信号。

42. 发明授权

US06567685B2 Magnetic resonance imaging apparatus 有权
标题翻译：磁共振成像装置
公开(公告)号：US06567685B2
公开(公告)日：2003-05-20
申请号：US09764215
申请日：2001-01-19
申请人： Hiromitsu Takamori , Ayumi Katsunuma , Hitoshi Kanazawa , Takeshiro Suzuki , Seiji Nozaki , Masatoshi Hanawa , Yoshio Machida , Masaaki Yamanaka , Masao Yui
发明人： Hiromitsu Takamori , Ayumi Katsunuma , Hitoshi Kanazawa , Takeshiro Suzuki , Seiji Nozaki , Masatoshi Hanawa , Yoshio Machida , Masaaki Yamanaka , Masao Yui
IPC分类号： A61B505
CPC分类号： G01R33/3854
摘要： A magnetic resonance imaging apparatus generates an MR signal from an object by applying a gradient field pulse generated by a gradient field coil and a high-frequency magnetic field pulse generated by a high-frequency coil to the object in a static field, and reconstructs an image on the basis of the MR signal. The gradient field coil is housed in a sealed vessel. The internal air in the sealed vessel is exhausted by the pump to prevent noise. By controlling the operation of the pump using a control circuit, noise in imaging operation can be reduced more effectively.
摘要翻译：磁共振成像装置通过将由梯度场线圈产生的梯度场脉冲和由高频线圈产生的高频磁场脉冲施加到静态场中的对象来生成来自对象的MR信号，并且重建基于MR信号的图像。梯度场线圈容纳在密封容器中。密封容器中的内部空气被泵排出，以防止噪音。通过使用控制电路控制泵的操作，可以更有效地降低成像操作中的噪声。

43. 发明授权

US5631560A Magnetic resonance imaging apparatus 失效
标题翻译：磁共振成像装置
公开(公告)号：US5631560A
公开(公告)日：1997-05-20
申请号：US511605
申请日：1995-08-04
申请人： Yoshio Machida
发明人： Yoshio Machida
IPC分类号： A61B5/055 , G01R33/54 , G01V3/00
CPC分类号： G01R33/4822 , G01R33/4833
摘要： A magnetic resonance imaging apparatus selectively excites a three-dimensional predetermined region called a slab and gives phase encode information and frequency encode information to magnetic resonance signals generated from the slab. Signals are acquired from a whole imaging region while the slab is slightly moved in a slice direction. The acquired signals are subjected to a Fourier-transformation in the slice direction. From the result of the Fourier transform, components acquired in the flat portion of the selective excitation characteristic are extracted. These signal components are arranged in accordance with the signal acquisition positions in the slice direction. Image reconstruction in the two remaining directions (the phase encode and the read directions) is then performed to obtain a final image.
摘要翻译：磁共振成像装置选择性地激励称为板坯的三维预定区域，并将相位编码信息和频率编码信息提供给从板坯产生的磁共振信号。信号从整个成像区域获取，而板坯沿切片方向稍微移动。所获取的信号在切片方向上进行傅立叶变换。从傅立叶变换的结果，提取在选择性激励特性的平坦部分中获取的分量。这些信号分量根据切片方向上的信号采集位置被布置。然后执行两个剩余方向（相位编码和读取方向）的图像重建以获得最终图像。

44. 发明授权

US5329231A Magnetic resonance imaging apparatus 失效
标题翻译：磁共振成像装置
公开(公告)号：US5329231A
公开(公告)日：1994-07-12
申请号：US48462
申请日：1993-04-14
申请人： Jun-ichi Hatta , Yoshio Machida
发明人： Jun-ichi Hatta , Yoshio Machida
IPC分类号： A61B5/055 , G01R33/48 , G01R33/483 , G01R33/54 , G01R33/561 , G01R33/20
CPC分类号： G01R33/482 , G01R33/561 , G01R33/4838
摘要： In a presaturation period, a radio-frequency (RF) pulse for selectively tilting only spins outside an imaging region is applied while a slice selective gradient field Gs is applied, and a spoiler gradient field Gsp for saturating transverse magnetization outside the imaging region is subsequently applied to selectively presaturate the spins outside the imaging region. In a high-speed imaging period after the presaturation period, a sequence TR constituted by an operation of applying a very short rectangular non-selective excitation pulse RF for tilting spins in a slice by a predetermined angle, an operation of applying phase encoding and readout gradient fields Gp and Gr (without applying the slice selective gradient field Gs), and an operation of acquiring an MR signal is performed many times while the amplitude of the phase encoding gradient field Gp is changed, thereby acquiring a one-slice MR signal. In some cases, an operation of applying the spoiler gradient field Gsp is added after the operation of acquiring an MR signal.
摘要翻译：在预饱和期间，在施加切片选择梯度场Gs的同时，施加用于选择性地倾斜成像区域外的旋转的射频（RF）脉冲，并且随后在成像区域外饱和横向磁化强度的扰流器梯度场Gsp 应用于选择性地使摄像区域外部的旋转前体变得容易。在预饱和期之后的高速摄像期间，通过将非常短的矩形非选择性激励脉冲RF施加到切片中使倾斜自旋预定角度的操作构成的序列TR，施加相位编码和读出的操作梯形场Gp和Gr（不应用片选择性梯度场Gs），并且在相位编码梯度场Gp的振幅改变时多次执行MR信号的获取操作，从而获得单片MR信号。在某些情况下，在获取MR信号的操作之后添加施加扰流板梯度场Gsp的操作。

45. 发明授权

US4896111A Method and system for improving resolution of images in magnetic resonance imaging 失效
标题翻译：用于提高磁共振成像中图像分辨率的方法和系统
公开(公告)号：US4896111A
公开(公告)日：1990-01-23
申请号：US278453
申请日：1988-12-01
申请人： Yoshio Machida , Kyojiro Nanbu
发明人： Yoshio Machida , Kyojiro Nanbu
IPC分类号： A61B10/00 , A61B5/055 , G01R33/48 , G01R33/56 , G06T11/00
CPC分类号： G01R33/56
摘要： In the magnetic resonance imaging, magnetic resonance (MR) signals generated from a predetermined region of a subject are detected by using the selective excitation method. The estimation of the subject is performed by executing the repetition solution in accordance with the spectral data of detected MR signal and region data representing the region of the subject. The MR image having the high resolution than the conventional MR image is obtained.
摘要翻译：在磁共振成像中，通过使用选择激励法检测从受检者的预定区域产生的磁共振（MR）信号。通过根据检测到的MR信号的频谱数据和表示对象的区域的区域数据执行重复解决方案来执行被摄体的估计。获得具有比常规MR图像高的分辨率的MR图像。

46. 发明授权

US4734648A Quadrature detection circuit for nuclear magnetic resonance apparatus 失效
标题翻译：核磁共振仪器正交检测电路
公开(公告)号：US4734648A
公开(公告)日：1988-03-29
申请号：US31803
申请日：1987-03-30
申请人： Yoshio Machida , Masahiko Hatanaka
发明人： Yoshio Machida , Masahiko Hatanaka
IPC分类号： A61B5/055 , A61B10/00 , G01N24/08 , G01R33/28 , G01R33/341 , G01R33/36 , H03D1/24 , G01R33/20
CPC分类号： G01R33/3678 , G01R33/3621
摘要： A quadrature detection circuit compensates for phase and amplitude differences in an NMR quadrature detection apparatus. The quadrature detection circuit comprises a test signal generator, first and second modulators, amplitude detectors, phase error detectors and a corrector. The corrector compensates the NMR signal as to phase and amplitude factors determined during an initial calibration mode utilizing the test signals, thus eliminating ghost images of the object which would otherwise be formed during image reconstruction.
摘要翻译：正交检测电路补偿NMR正交检测装置中的相位和幅度差。正交检测电路包括测试信号发生器，第一和第二调制器，幅度检测器，相位误差检测器和校正器。校正器对使用测试信号的初始校准模式期间确定的相位和幅度因子的NMR信号进行补偿，从而消除在图像重构期间将形成的物体的重影图像。

47. 发明授权

US08093894B2 Magnetic resonance imaging apparatus and magnetic resonance imaging method for improving uniformity in sensitivity map 有权
标题翻译：用于提高灵敏度图均匀性的磁共振成像装置和磁共振成像方法
公开(公告)号：US08093894B2
公开(公告)日：2012-01-10
申请号：US12396693
申请日：2009-03-03
申请人： Yoshio Machida , Nobuyasu Ichinose
发明人： Yoshio Machida , Nobuyasu Ichinose
IPC分类号： G01V3/00
CPC分类号： G01R33/3415 , G01R33/5611 , G01R33/5659
摘要： A magnetic resonance imaging apparatus includes a sensitivity map data generating unit and a sensitivity corrected image data generating unit. The sensitivity map data generating unit generates reference image data based on data for generating sensitivity map data of a phased array coil and generates the sensitivity map data by using reference image data after correction processing obtained by applying the correction processing to improve a uniformity with the reference image data based on the reference image data and phased array coil data for generating the sensitivity map data. The sensitivity corrected image data generating unit acquires image data for imaging with the phased array coil and performs sensitivity correction of the image data using the sensitivity map data.
摘要翻译：磁共振成像装置包括灵敏度图数据生成单元和灵敏度校正图像数据生成单元。灵敏度地图数据生成单元基于用于生成相控阵线圈的灵敏度地图数据的数据生成参考图像数据，并且通过应用校正处理获得的校正处理之后的参考图像数据生成灵敏度图数据，以提高参考的均匀性基于参考图像数据的图像数据和用于生成灵敏度图数据的相控阵列线圈数据。灵敏度校正图像数据生成单元获取用相位阵列线圈成像的图像数据，并使用灵敏度图数据执行图像数据的灵敏度校正。

48. 发明授权

US07906969B2 Magnetic resonance diagnosis apparatus, noise spatial distribution generating method, and signal acquisition method 有权
标题翻译：磁共振诊断装置，噪声空间分布生成方法及信号采集方法
公开(公告)号：US07906969B2
公开(公告)日：2011-03-15
申请号：US12359480
申请日：2009-01-26
申请人： Yoshio Machida
发明人： Yoshio Machida
IPC分类号： G01V3/00
CPC分类号： G01R33/48 , A61B5/055 , G01R33/543 , G01R33/5608 , G01R33/5611 , G01R33/56509
摘要： A magnetic resonance diagnosis apparatus includes a coil assembly including a high-frequency coil, a transmission unit which excites magnetization of a specific atomic nucleus of an object via the high-frequency coil, a reception unit including a detection unit for receiving a magnetic resonance signal via the high-frequency coil, a low-pass filter, and an analog/digital converter, a control unit which sets a passband of the low-pass filter to not less than three odd multiple of a frequency band determined from an imaging field of view, and sets a sampling frequency of the analog/digital converter to an oversampling frequency exceeding a signal band of the magnetic resonance signal, a noise spatial distribution generating unit which generates a noise spatial distribution on the basis of an output from the reception unit.
摘要翻译：磁共振诊断装置包括：线圈组件，其包括高频线圈，经由高频线圈激励物体的特定原子核的磁化的传输单元;接收单元，包括用于接收磁共振信号的检测单元通过高频线圈，低通滤波器和模拟/数字转换器，控制单元，其将低通滤波器的通带设置为不小于从成像领域确定的频带的三个奇数倍视图，并将模拟/数字转换器的采样频率设置为超过磁共振信号的信号频带的过采样频率;噪声空间分布产生单元，其基于来自接收单元的输出产生噪声空间分布。

49. 发明申请

US20080009708A1 Magnetic Resonance Imaging Apparatus and Magnetic Resonance Angiography Method 有权
标题翻译：磁共振成像装置和磁共振血管造影方法
公开(公告)号：US20080009708A1
公开(公告)日：2008-01-10
申请号：US11667462
申请日：2006-10-03
申请人： Yoshio Machida
发明人： Yoshio Machida
IPC分类号： A61B5/05 , G01V3/00 , G06K9/00
CPC分类号： G01R33/56383 , A61B5/0555 , A61B5/7257 , G01R33/546 , G01R33/5601 , G01R33/5635
摘要： A magnetic resonance imaging apparatus includes data acquiring means that acquires 3D raw data of a subject, 2D data extract means that extracts 2D data for “ky=0” out of the 3D raw data concurrently with the acquiring of 3D raw data by the data acquiring means, 2D-data rearranging means that Fourier-transforms in a z-axis direction the extractped 2D data for “ky=0” and rearranges the same on a kx-z space concurrently with the acquiring of 3D raw data by the data acquiring means, 2D-imade reconstructing means that performs a one-dimensional Fourier transform on z-data completed in a kx direction and acquires a 2D image for a real space concurrently with the acquiring of 3D raw data by the data acquiring means, and a display control means that causes to display a 2D image on a monitor concurrently with the acquiring of 3D raw data by the data acquiring means. Meanwhile, the magnetic resonance imaging apparatus has 3D-data rearranging means that Fourier-transforms the 3D raw data in the z-axis direction and rearranges the same on a kx-ky-z space, and 3D-image reconstructing means that performs a two-dimensional Fourier transform on the z-data completed in a kx/ky direction and acquires a 3D image for a real space, thus calculating a movement rate of the table top according to a rate-change signal inputted on an input device.
摘要翻译：磁共振成像装置包括获取被摄体的3D原始数据的数据获取装置，通过数据采集与3D原始数据的获取同时提取3D原始数据中的“ky = 0”的2D数据的2D数据提取装置意味着，2D数据重新排列意味着在z轴方向上对“ky = 0”的提取的2D数据进行傅立叶变换，并且在数据获取装置获取3D原始数据的同时在kx-z空间上重新排列相同对在z轴方向上完成的z数据进行一维傅里叶变换的二维逼近重建装置，并且通过数据获取装置获取3D原始数据同时获取实际空间的2D图像，并且显示控制意味着导致在数据获取装置获取3D原始数据的同时在监视器上显示2D图像。同时，磁共振成像装置具有3D数据重排装置，其在z轴方向上对三维原始数据进行傅里叶变换，并将其重新排列在kx-ky-z空间上，3D图像重建装置执行两个对在kx / ky方向上完成的z数据进行三维傅立叶变换，并获取实际空间的3D图像，从而根据输入装置上输入的速率变化信号计算台面的移动速度。

50. 发明申请

US20060106299A1 Magnetic resonance imaging device and data processing method for magnetic resonance imaging device 有权
标题翻译：磁共振成像装置及磁共振成像装置的数据处理方法
公开(公告)号：US20060106299A1
公开(公告)日：2006-05-18
申请号：US10539086
申请日：2005-02-25
申请人： Shinichi Uchizono , Yoshio Machida , Nobuyasu Ichinose
发明人： Shinichi Uchizono , Yoshio Machida , Nobuyasu Ichinose
IPC分类号： A61B5/05
CPC分类号： G01R33/3415 , G01R33/246 , G01R33/5659
摘要： A magnetic resonance imaging apparatus 20 includes a scan executing unit that executes scan to generate sensitivity map data of an RF coil 24, a region reduction unit 44b that applies region reduction to a signal region near a no-signal region of image data obtained by the scan, a sensitivity map data generating unit 44 that generates sensitivity map data using image data after the region reduction, and a smoothing processing unit 44i that applies three-dimensional smoothing filter to the sensitivity map data.
摘要翻译：磁共振成像装置20包括扫描执行单元，其执行扫描以产生RF线圈24的灵敏度地图数据;区域缩小单元44b，其将区域缩小部分应用于图像数据的非信号区域附近的信号区域，该扫描是在区域缩小之后使用图像数据生成灵敏度图数据的灵敏度图数据生成单元44以及将三维平滑滤波器应用于灵敏度图数据的平滑处理单元44 i。

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