公开(公告)号：US20070066886A1

公开(公告)日：2007-03-22

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： Scanning operation of acquiring data by repeating a scan based on the same encoding pattern at least once by using an R wave occurring at time T0 as a trigger is executed with respect to all encoding patterns. The necessary number of data for image reconstruction are extracted from MR data acquired by temporally retrospecting from the R wave occurrence time (time T1) next to the R wave (time T0) used as the trigger on the basis of the obtained data, data acquisition time information, and the R wave time. The extracted data are then rearranged to generate a data set for imaging the movement of the heart which is associated with end-diastole after the occurrence of the R wave used as the trigger, thereby performing image reconstruction.

摘要翻译： 针对所有编码模式执行通过使用在时间T 0出现的R波作为触发而至少通过一次重复基于相同编码模式的扫描来获取数据的扫描操作。 从R波旁边的R波发生时间（时间T 1> 1）通过时间回顾获取的MR数据中提取必要数量的用于图像重构的数据（时间T 0 ）用作基于所获得的数据，数据获取时间信息和R波时间的触发。 然后将所提取的数据重新排列，以产生用于对作为触发器的R波出现之后与舒张末期相关的心脏运动进行成像的数据组，从而进行图像重建。

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：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。

公开(公告)号：US20070205769A1

公开(公告)日：2007-09-06

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：US07825660B2

公开(公告)日：2010-11-02

申请号：US12076166

申请日：2008-03-14

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：US20080231271A1

公开(公告)日：2008-09-25

申请号：US12076166

申请日：2008-03-14

申请人： Masao Yui ,  Yoshimori Kassai ,  Shigehide Kuhara

发明人： Masao Yui ,  Yoshimori Kassai ,  Shigehide Kuhara

IPC分类号： G01R33/54

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.

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：US09662037B2

公开(公告)日：2017-05-30

申请号：US13354775

申请日：2012-01-20

申请人： Naho Takahashi ,  Masao Yui

发明人： Naho Takahashi ,  Masao Yui

IPC分类号： G01V3/00 ,  A61B5/055 ,  G01R33/48 ,  A61B5/00

CPC分类号： A61B5/055 ,  A61B5/0037 ,  G01R33/48

摘要： According to one embodiment, a magnetic resonance imaging apparatus includes a spectrum acquisition unit, a resonance frequency acquisition unit and an imaging unit. The spectrum acquisition unit is configured to acquire frequency spectra of magnetic resonance signals from an object while changing a suppression effect or an enhancing effect of signals from a specific material. The resonance frequency acquisition unit is configured to obtain a resonance frequency of the specific material or another material based on an index representing a difference in intensities of signals from the specific material or the another material between the frequency spectra. The imaging unit is configured to perform imaging using a radio frequency pulse having a center frequency set to the resonance frequency of the specific material or the another material.

公开(公告)号：US20090134871A1

公开(公告)日：2009-05-28

申请号：US12273718

申请日：2008-11-19

申请人： Masao Yui

发明人： Masao Yui

IPC分类号： G01R33/48

CPC分类号： G01R33/5635 ,  G01R33/5614 ,  G01R33/56316 ,  G01R33/56509 ,  G01R33/5673

摘要： A magnetic resonance imaging apparatus includes a data acquisition unit and an image generating unit. The data acquisition unit acquires MR data according to an imaging condition for obtaining a SSFP in flowing matter by applying excitation pulses having a same flip angle with a constant TR and gradient magnetic fields to an object. The image generating unit generates an image of the flowing matter based on the MR data.

摘要翻译： 磁共振成像装置包括数据获取单元和图像生成单元。 数据采集​​单元根据用于通过将具有相同翻转角的激励脉冲与常量TR和梯度磁场相关联的激发脉冲，根据用于获得流动物质中的SSFP的成像条件来获取MR数据。 图像生成单元基于MR数据生成流动物体的图像。

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。