公开(公告)号：US08952692B2

公开(公告)日：2015-02-10

申请号：US13157640

申请日：2011-06-10

申请人： Naho Takahashi ,  Masato Ikedo

发明人： Naho Takahashi ,  Masato Ikedo

IPC分类号： G01R33/483 ,  G01R33/565

CPC分类号： G01R33/483 ,  G01R33/5659

摘要： According to one embodiment, a magnetic resonance imaging apparatus includes an image generating unit, a judging unit and a correction unit. The image generating unit receives, from an object, a magnetic resonance signal caused by transmission of an RF pulse to cause a nuclear magnetic resonance, and generates image data of the object based on the magnetic resonance signal. The judging unit identifies an implant region where an implant part exists inside the object, based on the image data. The correction unit acquires magnetic resonance frequency information from a body region which is a region inside the object excluding the implant region, and corrects a center frequency of the RF pulse based on the magnetic resonance frequency information.

摘要翻译： 根据一个实施例，磁共振成像装置包括图像生成单元，判断单元和校正单元。 图像生成单元从对象接收由RF脉冲的发送引起的核磁共振引起的磁共振信号，并且基于磁共振信号生成对象的图像数据。 判断单元基于图像数据识别植入物部分存在于物体内部的植入区域。 校正单元从除了植入区域之外的物体内的身体区域获取磁共振频率信息，并且基于磁共振频率信息来校正RF脉冲的中心频率。

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：US20110304331A1

公开(公告)日：2011-12-15

申请号：US13157640

申请日：2011-06-10

申请人： Naho TAKAHASHI ,  Masato Ikedo

发明人： Naho TAKAHASHI ,  Masato Ikedo

IPC分类号： G01R33/48

CPC分类号： G01R33/483 ,  G01R33/5659

摘要： According to one embodiment, a magnetic resonance imaging apparatus includes an image generating unit, a judging unit and a correction unit. The image generating unit receives, from an object, a magnetic resonance signal caused by transmission of an RF pulse to cause a nuclear magnetic resonance, and generates image data of the object based on the magnetic resonance signal. The judging unit identifies an implant region where an implant part exists inside the object, based on the image data. The correction unit acquires magnetic resonance frequency information from a body region which is a region inside the object excluding the implant region, and corrects a center frequency of the RF pulse based on the magnetic resonance frequency information.

摘要翻译： 根据一个实施例，磁共振成像装置包括图像生成单元，判断单元和校正单元。 图像生成单元从对象接收由RF脉冲的发送引起的核磁共振引起的磁共振信号，并且基于磁共振信号生成对象的图像数据。 判断单元基于图像数据识别植入物部分存在于物体内部的植入区域。 校正单元从除了植入区域之外的物体内的身体区域获取磁共振频率信息，并且基于磁共振频率信息来校正RF脉冲的中心频率。

公开(公告)号：US20120119740A1

公开(公告)日：2012-05-17

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： G01R33/48 ,  G01R33/34

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 with 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 of which center frequency is set to the resonance frequency of the specific material or the another material.

摘要翻译： 根据一个实施例，磁共振成像装置包括频谱获取单元，共振频率获取单元和成像单元。 频谱获取单元被配置为从对象获取磁共振信号的频谱，改变来自特定材料的抑制效果或增强的信号效果。 谐振频率获取单元被配置为基于表示来自特定材料或另一材料的信号在频谱之间的强度差的指标来获得特定材料或另一种材料的共振频率。 成像单元被配置为使用其中心频率被设置为特定材料或另一材料的共振频率的射频脉冲来执行成像。