公开(公告)号：US20080187180A1

公开(公告)日：2008-08-07

申请号：US12019459

申请日：2008-01-24

申请人： MASAO YUI

发明人： MASAO YUI

IPC分类号： G06K9/00

CPC分类号： G01R33/56325 ,  G01R33/543 ,  G01R33/5635 ,  G01R33/56509 ,  G01R33/5673 ,  G01R33/5676

摘要： A magnetic resonance imaging apparatus includes a cine-imaging unit, a characterizing-part detecting unit, a motion-analyzing unit, and an image-extracting unit. First, the cine-imaging unit collects the time-series images of a region of interest in a subject and reconstructs an image. Next, the characterizing-part detecting unit detects the characteristics of the time-series images. The motion-analyzing unit analyzes motion-characteristic values of the characteristics extracted by the characterizing-part detecting unit. The image-extracting unit extracts a specified time-series image in accordance with the motion-characteristic values.

摘要翻译： 磁共振成像设备包括电影摄像单元，特征部分检测单元，运动分析单元和图像提取单元。 首先，电影摄影单元收集被摄体中的感兴趣区域的时间序列图像并重建图像。 接下来，表征部检测单元检测时间序列图像的特性。 运动分析单元分析由特征部分检测单元提取的特征的运动特性值。 图像提取单元根据运动特征值提取指定的时间序列图像。

公开(公告)号：US07365543B2

公开(公告)日：2008-04-29

申请号：US11699325

申请日：2007-01-30

申请人： Masao Yui ,  Yoshimori Kassai ,  Shigehide Kuhara

发明人： Masao Yui ,  Yoshimori Kassai ,  Shigehide Kuhara

IPC分类号： G01V3/00

CPC分类号： G01R33/56509 ,  G01R33/546 ,  G01R33/5614 ,  G01R33/5635 ,  G01R33/56518 ,  G01R33/5676

摘要： An MRI apparatus includes an imaging signal acquisition unit, a motion signal acquisition unit, a motion amount determination unit, a motion correction unit and an image reconstruction unit. The imaging signal acquisition unit acquires MR signals as imaging signals. The motion signal acquisition unit repetitively acquires MR signals having PE amount less than that of the imaging signals as motion signals. The motion amount determination unit obtains a motion amount using the motion signals. The motion correction unit performs correction processing of the imaging signals in accordance with the motion amount. The image reconstruction unit reconstructs an image using the imaging signals after the correction processing.

摘要翻译： MRI装置包括成像信号获取单元，运动信号获取单元，运动量确定单元，运动校正单元和图像重建单元。 成像信号获取单元获取MR信号作为成像信号。 运动信号获取单元重复获取具有小于成像信号的PE量的MR信号作为运动信号。 运动量确定单元使用运动信号获得运动量。 运动校正单元根据运动量进行摄像信号的校正处理。 图像重建单元使用校正处理之后的成像信号来重建图像。

公开(公告)号：US5892359A

公开(公告)日：1999-04-06

申请号：US794590

申请日：1997-02-03

申请人： Masao Yui ,  Kiyomi Mori ,  Arturo Calderon ,  Shigehide Kuhara

发明人： Masao Yui ,  Kiyomi Mori ,  Arturo Calderon ,  Shigehide Kuhara

IPC分类号： A61B5/055 ,  G01R33/385 ,  H01F7/20 ,  G01N3/00

CPC分类号： G01R33/385

摘要： An active shield type gradient coil apparatus comprises main coils for generating a gradient magnetic field and shield coils for generating a magnetic field to reduce the leak magnetic field from the main coils. In the active shield type gradient coil apparatus, a stimulation output section for outputting stimulation to a subject is incorporated. In this incorporation, the main coils are arranged at the outside of an area sandwiched between the stimulation output section and the subject such that the simulation can be transmitted to the subject from the stimulation output section without being blocked by the main coils. By this arrangement, both the use of the active shield type as the gradient coil apparatus and good transmission of stimulation to the subject can be realized.

摘要翻译： 有源屏蔽型梯度线圈装置包括用于产生梯度磁场的主线圈和用于产生磁场的屏蔽线圈，以减少来自主线圈的泄漏磁场。 在有源屏蔽型梯度线圈装置中，包括用于向对象输出刺激的刺激输出部。 在这种结合中，主线圈布置在夹在刺激输出部分和被检体之间的区域的外侧，使得模拟可以从刺激输出部分被传送到被检体而不被主线圈阻挡。 通过这种布置，可以实现使用主动屏蔽型作为梯度线圈装置，并且可以实现对对象的刺激的良好传输。

公开(公告)号：US10429480B2

公开(公告)日：2019-10-01

申请号：US13438141

申请日：2012-04-03

申请人： Yuichi Yamashita ,  Masao Yui

发明人： Yuichi Yamashita ,  Masao Yui

IPC分类号： G01R33/565 ,  G01R33/48 ,  G01R33/561

摘要： A magnetic resonance imaging apparatus according to an embodiment includes a first acquiring unit, a second acquiring unit, and a combining unit. The first acquiring unit is configured to acquire data by executing a pulse sequence based on a first radio-frequency pulse transmission condition. The second acquiring unit is configured to acquire data by executing a pulse sequence based on a second radio-frequency pulse transmission condition that is different from the first radio-frequency pulse transmission condition. The combining unit is configured to perform a combining process either on the data acquired by the first acquiring unit and the data acquired by the second acquiring unit or on data obtained by reconstructing the data acquired by the first acquiring unit and data obtained by reconstructing the data acquired by the second acquiring unit.

公开(公告)号：US09696401B2

公开(公告)日：2017-07-04

申请号：US12854426

申请日：2010-08-11

申请人： Masao Yui

发明人： Masao Yui

IPC分类号： G06K9/00 ,  G01R33/567 ,  G01R33/483

CPC分类号： G01R33/5676 ,  G01R33/4835

摘要： In a magnetic resonance imaging system, MRI data acquisition sequences are repeatedly and alternately executed for (a) a diagnostic image and (b) a navigator image that is an image for motion detection. Each subsequent navigator image is analyzed to detect the position of a mark indicating the position of a slice excited by the prior execution of a diagnostic imaging sequence. The respiratory motion of a portion of the subject is estimated based on the detected position of the mark.

公开(公告)号：US20130113486A1

公开(公告)日：2013-05-09

申请号：US13669703

申请日：2012-11-06

申请人： Naho IMAMURA ,  Masao YUI

发明人： Naho IMAMURA ,  Masao YUI

IPC分类号： G01R33/58 ,  G01R33/341

CPC分类号： G01R33/58 ,  G01R33/341 ,  G01R33/3415 ,  G01R33/543 ,  G01R33/56383

摘要： In one embodiment, an MRI apparatus (20) includes a main scan executing unit for executing a main scan, an image reconstruction unit (90) for reconstructing image data based on MR signals acquired in the main scan, a calibration scan setting unit (100), a calibration scan executing unit, and a condition determining unit. The calibration scan setting unit calculates a condition of a calibration scan for determining “an imaging condition of the main scan” or “a condition of correction processing of the image data”, based on a type of an RF coil device and an imaging part. The calibration scan executing unit executes the calibration scan based on the condition of the calibration scan. The condition determining unit determines “the imaging condition of the main scan” or “the condition of the correction processing”, based on an execution result of the calibration scan.

摘要翻译： 在一个实施例中，MRI装置（20）包括用于执行主扫描的主扫描执行单元，用于基于在主扫描中获取的MR信号重建图像数据的图像重建单元（90），校准扫描设置单元 ），校准扫描执行单元和条件确定单元。 校准扫描设置单元基于RF线圈装置和成像部件的类型来计算用于确定“主扫描的成像条件”或“图像数据的校正处理的条件”的校准扫描的条件。 校准扫描执行单元根据校准扫描的条件执行校准扫描。 条件确定单元基于校准扫描的执行结果确定“主扫描的成像条件”或“校正处理的条件”。

公开(公告)号：US08417007B2

公开(公告)日：2013-04-09

申请号：US12330949

申请日：2008-12-09

申请人： Masao Yui

发明人： Masao Yui

IPC分类号： G06T7/00 ,  G06T15/00

CPC分类号： G01R33/56308 ,  G01R33/56316

摘要： A magnetic resonance imaging apparatus includes a data acquisition unit, a correction unit, a sorting unit and an image reconstruction unit. The data acquisition unit acquires data for imaging and projection data. The correction unit performs motion correction of the data using respiratory motion data obtained based on the projection data. The sorting unit sorts the data after motion correction into a cardiac time phase order based on electrocardiographic information. The image reconstruction unit reconstructs three-dimensional image data based on the sorted data after motion correction.

摘要翻译： 磁共振成像装置包括数据获取单元，校正单元，分类单元和图像重建单元。 数据采集​​单元获取用于成像和投影数据的数据。 校正单元使用基于投影数据获得的呼吸运动数据来执行数据的运动校正。 排序单元基于心电图信息将运动校正后的数据分类为心脏时间相位序列。 图像重建单元基于运动校正后的排序数据来重建三维图像数据。

公开(公告)号：US08148981B2

公开(公告)日：2012-04-03

申请号：US12336708

申请日：2008-12-17

申请人： Masao Yui

发明人： Masao Yui

IPC分类号： G01V3/00

CPC分类号： G01R33/561 ,  G01R33/543 ,  G01R33/5614 ,  G01R33/56527 ,  G01R33/56563

摘要： A magnetic resonance imaging apparatus includes an input unit, a data acquisition unit and an image generating unit. The input unit inputs information indicating a matter of which resonance frequency is a center frequency of an excitation pulse. The data acquisition unit acquires magnetic resonance data with obtaining a steady state free precession. Each of the plural excitation pulses has a transmission phase varying by a variation amount determined based on a difference between a resonance frequency and the center frequency. The image generating unit generates an image of the desired matter based on the magnetic resonance data.

摘要翻译： 磁共振成像装置包括输入单元，数据获取单元和图像生成单元。 输入单元输入指示哪个共振频率是激励脉冲的中心频率的信息。 数据采集​​单元获得稳态自由进动的磁共振数据。 多个激励脉冲中的每一个具有根据谐振频率和中心频率之间的差确定的变化量而变化的发送相位。 图像生成单元基于磁共振数据生成所需物体的图像。

公开(公告)号：US07906963B2

公开(公告)日：2011-03-15

申请号：US12457369

申请日：2009-06-09

申请人： Masao Yui

发明人： Masao Yui

IPC分类号： G01V3/00

CPC分类号： G01R33/5614 ,  G01R33/4824 ,  G01R33/4828 ,  G01R33/4835 ,  G01R33/5602 ,  G01R33/5607 ,  G01R33/5635 ,  G01R33/56366

摘要： A magnetic resonance imaging apparatus includes a data acquisition unit and an image data generating unit. The data acquisition unit acquires data according to a sequence derived by adding a coherent control pulse on a Steady-State Free Precession pulse sequence for repeating plural radio frequency excitations with a constant interval. The coherent control pulse has a center at a substantially center time between adjacent radio frequency excitations and a zero-order moment of which amount is zero. The image data generating unit generates image data based on the data.

摘要翻译： 磁共振成像设备包括数据获取单元和图像数据生成单元。 数据获取单元根据通过在稳态自由进动脉冲序列上添加相干控制脉冲导出的序列来获取数据，以用于以恒定间隔重复多个射频激励。 相干控制脉冲具有在相邻射频激励之间的基本中心时间的中心和零量的零阶矩。 图像数据生成单元基于该数据生成图像数据。

公开(公告)号：US07684848B2

公开(公告)日：2010-03-23

申请号：US11231878

申请日：2005-09-22

申请人： Shigehide Kuhara ,  Masao Yui ,  Yoshimori Kassai

发明人： Shigehide Kuhara ,  Masao Yui ,  Yoshimori Kassai

IPC分类号： A61B5/05

CPC分类号： G01R33/5673

摘要： Data acquisition based on the same MRI encoding pattern is repeated at least once for each R wave occurring at time T0 used as a trigger. The necessary number of data for image reconstruction are extracted as subsets of a complete MRI data set from the resulting plural sets of acquired MRI by temporally retrospecting from the next R wave occurrence time (time T1) after the R wave (time T0) used as the trigger. The extracted data subsets are then rearranged to generate a complete composite MRI data set which is then used for image reconstruction of heart movement associated with end-diastole after the occurrence of the triggering R wave.

摘要翻译： 对于在用作触发的时间T0发生的每个R波，基于相同MRI编码模式的数据采集被重复至少一次。 在用作R波（时间T0）之后的下一个R波发生时间（时间T1），从所得到的多组获取的MRI中提取必要数量的用于图像重建的数据作为完整MRI数据集的子集， 触发器。 提取的数据子集然后被重新排列以产生完整的复合MRI数据集，然后将其用于在触发R波发生之后与舒张末期相关的心脏运动的图像重建。