公开(公告)号：US07613496B2

公开(公告)日：2009-11-03

申请号：US11524309

申请日：2006-09-21

申请人： Mitsue Miyazaki ,  Hitoshi Kanazawa

发明人： Mitsue Miyazaki ,  Hitoshi Kanazawa

IPC分类号： A61B5/05

CPC分类号： G01R33/5635 ,  G01R33/543 ,  G01R33/5608 ,  G01R33/5617 ,  G01R33/56316 ,  G01R33/56509 ,  G01R33/5673

摘要： A magnetic resonance imaging apparatus includes a blood flow velocity acquiring unit that acquires a flow velocity of the blood flow of an object, a capturing condition setting unit that, on the basis of the flow velocity of the blood flow acquired by the blood flow velocity acquiring unit, sets at least one of a transmitting phase of a transmitted exciting pulse, a transmitting phase of a refocusing pulse, a shift amount of the relative phase difference between the transmitted exciting phase and the refocusing pulse, and an intensity of a gradient pulse in a readout direction as a capturing condition, and a blood flow image capturing unit that creates a blood flow image of the object by performing an imaging scan on the basis of the capturing condition set by the capturing condition setting unit.

摘要翻译： 一种磁共振成像装置，具备取得被检体的血流的流速的血流速度获取部，基于由所述血流速度获取得到的血流的流速的拍摄条件设定部 设置发送的激励脉冲的发送相位，再聚焦脉冲的发送相位，发送的激励相位和重聚焦脉冲之间的相对相位的偏移量以及梯度脉冲的强度中的至少一个， 读取方向作为捕获条件，以及血流图像捕获单元，其通过基于由捕获条件设置单元设置的捕获条件执行成像扫描来创建对象的血流图像。

公开(公告)号：US07420368B2

公开(公告)日：2008-09-02

申请号：US11411234

申请日：2006-04-26

申请人： Mitsue Miyazaki

发明人： Mitsue Miyazaki

IPC分类号： G01V3/00

CPC分类号： G01N24/08 ,  G01R33/4828

摘要： A magnetic resonance imaging apparatus comprises: a chemical shift data storage unit, a first frequency adjusting unit, a first imaging unit, a second frequency adjust unit and a second imaging unit. The chemical shift data storage unit stores chemical shift data. The first frequency adjusting unit adjusts a center frequency of a first excitation pulse to a resonant frequency of a designated first substance. The first imaging unit generates an image in which the first substance is enhanced by performing a chemical shift imaging scanning with the first excitation pulse. The second frequency adjust unit automatically adjusts a center frequency of a second excitation pulse to a resonant frequency of a preliminarily designated second substance in accordance with chemical shift data. The second imaging unit generates an image in which the second substance is enhanced by performing a chemical shift imaging scanning with the second excitation pulse.

摘要翻译： 磁共振成像装置包括：化学位移数据存储单元，第一频率调节单元，第一成像单元，第二频率调整单元和第二成像单元。 化学位移数据存储单元存储化学位移数据。 第一频率调整单元将第一激励脉冲的中心频率调整为指定的第一物质的共振频率。 第一成像单元通过利用第一激发脉冲执行化学位移成像扫描来生成其中第一物质被增强的图像。 第二频率调整单元根据化学位移数据自动将第二激励脉冲的中心频率调整为预先指定的第二物质的共振频率。 第二成像单元通过利用第二激发脉冲执行化学位移成像扫描来生成其中第二物质被增强的图像。

公开(公告)号：US20080071166A1

公开(公告)日：2008-03-20

申请号：US11896942

申请日：2007-09-06

申请人： Mitsue Miyazaki

发明人： Mitsue Miyazaki

IPC分类号： A61B5/055 ,  G01V3/14

CPC分类号： G01R33/5635 ,  A61B5/0263 ,  A61B5/055 ,  G01R33/3415 ,  G01R33/546 ,  G01R33/5601 ,  G01R33/5605 ,  G01R33/5607 ,  G01R33/56341 ,  G01R33/56383 ,  G01R33/5673

摘要： A magnetic resonance imaging apparatus includes an imaging condition setting unit, a data acquisition unit and an image data generating unit. The imaging condition setting unit sets respective imaging conditions corresponding to plural imaging regions. The respective imaging conditions include at least one non-contrast-enhanced imaging condition. The data acquisition unit acquires respective pieces of data corresponding to the plural imaging regions according to the respective imaging conditions. The image data generating unit generates image data based on the respective pieces of data corresponding to the plural imaging regions.

摘要翻译： 磁共振成像设备包括成像条件设置单元，数据获取单元和图像数据生成单元。 成像条件设置单元设置与多个成像区域对应的各个成像条件。 各个成像条件包括至少一个非造影增强成像条件。 数据获取单元根据各自的成像条件获取与多个成像区域对应的各个数据。 图像数据生成单元基于与多个成像区域对应的各个数据生成图像数据。

公开(公告)号：US07308298B2

公开(公告)日：2007-12-11

申请号：US10024536

申请日：2001-12-21

申请人： Mitsue Miyazaki

发明人： Mitsue Miyazaki

IPC分类号： A61B5/05

CPC分类号： G01R33/563 ,  G01R33/5605

摘要： A magnetic resonance imaging technique provides adequate MT effects by applying a shortened MT pulse and scan time. An MT pulse whose frequency is off-resonance to a region to be imaged of an object is first applied to he object, a spoiler pulse is applied to the object, and an echo signal is acquired from the region to be imaged. The duration of the MT pulse is set to a relatively shorter time than conventional. Preferably, the duration is less than 10 ms. The area of the MT pulse waveform is set to a specified value equivalent to the conventional. The MT pulse is preferably applicable to a two-dimensional scan using the multislice technique but can also be used in a three-dimensional scan.

摘要翻译： 磁共振成像技术通过应用缩短的MT脉冲和扫描时间来提供足够的MT效应。 首先对其物体施加频率与待成像对象的区域共频的MT脉冲，向对象施加扰流脉冲，并且从要成像的区域获取回波信号。 MT脉冲的持续时间设定为比传统时间短的时间。 优选地，持续时间小于10ms。 MT脉搏波形的面积设定为与常规值相当的规定值。 MT脉冲优选地适用于使用多层技术的二维扫描，但是也可以用于三维扫描。

公开(公告)号：US20070265522A1

公开(公告)日：2007-11-15

申请号：US11819655

申请日：2007-06-28

申请人： Yoshimori Kassai ,  Mitsue Miyazaki ,  Satoshi Sugiura

发明人： Yoshimori Kassai ,  Mitsue Miyazaki ,  Satoshi Sugiura

IPC分类号： A61B5/055

CPC分类号： A61B5/055 ,  A61B5/0456 ,  A61B5/7207 ,  A61B5/7257 ,  A61B5/7285 ,  G01R33/4828 ,  G01R33/5605 ,  G01R33/5607 ,  G01R33/5615 ,  G01R33/5617 ,  G01R33/5635 ,  G01R33/5673

摘要： A magnetic resonance imaging (MRI) system includes an ECG detector for the patient object being imaged and an element for performing an MRI pulse sequence. An imaging unit defined by the pulse sequence is longer in temporal length than one heart beat represented by the ECG signal. An MR signal is acquired from the object in response to the pulse sequence and an MR image based on the acquired MR signal is produced. A plurality of divided MT pulses can be applied instead of the conventional single MT pulse. In this case, an SE-system pulse sequence having a shorter echo train spacing is used, to generate sounds by applying gradient pulses incorporated in an imaging pulse sequence so as to automatically instruct a patient to perform an intermittent breath hold during three-dimensional scanning.

摘要翻译： 磁共振成像（MRI）系统包括用于被成像的患者物体的ECG检测器和用于执行MRI脉冲序列的元件。 由脉冲序列定义的成像单元在时间长度上比由ECG信号表示的一个心跳更长。 响应于脉冲序列从对象获取MR信号，并且产生基于获取的MR信号的MR图像。 可以应用多个划分的MT脉冲来代替传统的单个MT脉冲。 在这种情况下，使用具有更短回波串间距的SE系统脉冲序列，通过应用结合在成像脉冲序列中的梯度脉冲来产生声音，以便在三维扫描期间自动指示患者执行间歇性呼吸 。

公开(公告)号：US06782286B2

公开(公告)日：2004-08-24

申请号：US09294148

申请日：1999-04-20

申请人： Mitsue Miyazaki

发明人： Mitsue Miyazaki

IPC分类号： A61B5055

CPC分类号： G01R33/563 ,  G01R33/5673

摘要： Without injecting a contrast medium, blood pumped out from the heart can preferably be depicted in a non-invasive fashion, resulting in a greatly shortened scanning time for data acquisition. An MRI system temporal phase detector acquires an ECG signal of an object, and an imaging scanner performs a three-dimensional scanning pulse sequence every slice encoding in synchronism with an ECG signal. The pulse sequence includes an RF excitation pulse for which a repetition time is set to be shorter than conventional. In addition, the pulse sequence includes a slice-directional gradient for performing data acquisition based on the slice encoding in an approximately parallel direction to a running direction of blood flow. Furthermore, the pulse sequence includes a phase-encoding directional gradient for applying phase encoding in a direction approximately coinciding with a running direction of the blood flow.

摘要翻译： 不注射造影剂，可以优选以非侵入性方式描绘从心脏抽出的血液，导致用于数据采集的扫描时间大大缩短。 MRI系统时间相位检测器获取对象的ECG信号，并且成像扫描器与ECG信号同步地执行每个切片编码的三维扫描脉冲序列。 脉冲序列包括重复时间设置为比常规短的RF激励脉冲。 此外，脉冲序列包括用于基于在与血流的行进方向大致平行的方向上的切片编码来执行数据采集的切片方向梯度。 此外，脉冲序列包括用于在大致与血流的行进方向一致的方向上施加相位编码的相位编码方向梯度。

公开(公告)号：US5677626A

公开(公告)日：1997-10-14

申请号：US316896

申请日：1994-10-03

申请人： Mitsue Miyazaki ,  Fumitoshi Kojima

发明人： Mitsue Miyazaki ,  Fumitoshi Kojima

IPC分类号： G01R33/48 ,  G01R33/54 ,  G01V3/00

CPC分类号： G01R33/5605 ,  G01R33/4835 ,  G01R33/3875 ,  G01R33/543 ,  G01R33/5607

摘要： A system for magnetic resonance imaging is provided in which a prepulse is first applied to an object being examined placed in a static magnetic field for suppressing an MR signal from fat of the object. Then a pulse sequence including an RF pulse for multi-slice imaging of a plurality of slicing planes is applied to the object for acquiring image data. The system comprises an element for performing a shimming increasing uniformity of the static magnetic field, an element for detecting, every one of the slicing planes, an offset value offsetting a frequency shift of a spectrum distribution caused by turbulence in higher-order components of the static magnetic field, and an element for correcting, every one of the slicing planes, a frequency range of the prepulse in accordance with the offset value detected. The correcting element corrects a frequency of the RF pulse in compliance with the detected offset value.

摘要翻译： 提供了一种用于磁共振成像的系统，其中首先将预脉冲施加到放置在静态磁场中的被检查物体，以抑制来自对象的脂肪的MR信号。 然后，将包括用于多个切片平面的多切片成像的RF脉冲的脉冲序列应用于用于获取图像数据的对象。 该系统包括用于执行增加静态磁场的均匀性的匀场的元件，用于检测每个切片平面中的每个切片平面的偏移值，该偏移值抵消由湍流引起的频谱分布的频移， 静态磁场和用于根据检测到的偏移值来校正每个切片平面上的预脉冲的频率范围的元件。 校正元件根据检测到的偏移值校正RF脉冲的频率。

公开(公告)号：US5557202A

公开(公告)日：1996-09-17

申请号：US233353

申请日：1994-04-26

申请人： Mitsue Miyazaki ,  Fumitoshi Kojima

发明人： Mitsue Miyazaki ,  Fumitoshi Kojima

IPC分类号： A61B5/055 ,  G01N24/08 ,  G01R33/46 ,  G01R33/48 ,  G01R33/483 ,  G01R33/54 ,  G01V3/00

CPC分类号： G01R33/5605 ,  G01R33/3875 ,  G01R33/4835 ,  G01R33/543 ,  G01R33/5607

摘要： A method of magnetic resonance imaging comprises, as one aspect, the steps of performing a first sequence including a step for applying a binomial pulse and performing a second sequence for collecting magnetic resonance (MR) image data. The binomial pulse application step, the central frequency of the binomial pulse is offset by a predetermined offset amount toward the high frequency side with respect to the resonance frequency of protons contained in water and the binomial pulse is applied.

摘要翻译： 作为一个方面，磁共振成像的方法包括执行包括用于施加二项式脉冲并执行用于收集磁共振（MR）图像数据的第二序列的步骤的第一序列的步骤。 二项式脉冲施加步骤中，二项式脉冲的中心频率相对于包含在水中的质子的共振频率向高频侧偏移预定偏移量，并施加二项式脉冲。

公开(公告)号：US09700230B2

公开(公告)日：2017-07-11

申请号：US13598435

申请日：2012-08-29

申请人： Xiangzhi Zhou ,  Mitsue Miyazaki

发明人： Xiangzhi Zhou ,  Mitsue Miyazaki

IPC分类号： A61B5/055 ,  A61B5/00 ,  G01R33/56

CPC分类号： A61B5/055 ,  A61B5/0044 ,  G01R33/5607

摘要： MRI k-space data is acquired for a patient ROI during data acquisition sequences including a nuclear magnetic resonance (NMR) signal readout period using a late gadolinium enhanced (LGE) data acquisition sequence including at least one fat-specific RF NMR magnetization inversion pulse imposed (a) after a water-specific RF NMR magnetization inversion pulse timed to cause a substantial null in NMR magnetization of normal tissue protons near a center of the readout period and (b) before the readout period center, which fat-specific inversion pulse is also timed to cause a substantial null in NMR magnetization of fat tissue protons near the readout period center. The acquired MR image data is reconstructed into a contrast enhanced LGE image of tissues within the ROI but having substantially suppressed normal and fat components therein.

公开(公告)号：US09414765B2

公开(公告)日：2016-08-16

申请号：US13415188

申请日：2012-03-08

申请人： Mitsue Miyazaki ,  Andrew J. Wheaton

发明人： Mitsue Miyazaki ,  Andrew J. Wheaton

IPC分类号： G01R33/48 ,  G01R33/44 ,  A61B5/055 ,  A61B5/026 ,  G01R33/563 ,  A61B5/0456 ,  G01R33/561 ,  G01R33/567

CPC分类号： A61B5/055 ,  A61B5/0263 ,  A61B5/0456 ,  G01R33/5617 ,  G01R33/5635 ,  G01R33/5673

摘要： A magnetic resonance imaging (MRI) is configured to effect magnetic resonance angiography (MRA) data acquisition sequences including electrocardiogram (ECG) triggered fresh blood imaging (FBI) images respectively associated with systolic and diastolic phases of ECG cycles. An operator input and display interface may be configured to provide operator options for independently controlling at least one imaging sequence parameter to have a different value for each of systolic and diastolic phase images in an FBI MRI data acquisition sequence.

摘要翻译： 磁共振成像（MRI）被配置为实现磁共振血管造影（MRA）数据采集序列，包括分别与ECG周期的收缩期和舒张期相关的心电图（ECG）触发的新鲜血液成像（FBI）图像。 操作者输入和显示界面可以被配置为提供操作者选项，用于独立地控制至少一个成像序列参数以对FBI MRI数据采集序列中的每个收缩期和舒张期相位图像具有不同的值。