公开(公告)号：US5898305A

公开(公告)日：1999-04-27

申请号：US844304

申请日：1997-04-18

申请人： Katsutoshi Kokubun ,  Takeshiro Suzuki ,  Masaaki Yui

发明人： Katsutoshi Kokubun ,  Takeshiro Suzuki ,  Masaaki Yui

IPC分类号： G01R33/56 ,  G01R33/561 ,  G01V3/00

CPC分类号： G01R33/56 ,  G01R33/56308

摘要： A magnetic resonance imaging apparatus comprises a collecting section that collects from the subject the magnetic resonance signals corresponding to N phase encode data items for restructuring each of a plurality of images, a restructuring section that restructures each set of N phase encode data items corresponding to the magnetic resonance signals obtained by the collecting section, an image processing section that processes the restructured images obtained at the restructuring section, an image output section that outputs the processed images obtained at the image processing section, and a changing section that changes the number of phase encode data items updated among the N phase encode data items restructured at the restructuring section, while the collecting section is in operation.

摘要翻译： 磁共振成像装置包括收集部，其从对象收集对应于用于重构多个图像中的每一个的N相编码数据项的磁共振信号;重构部，其重构与所述多个图像对应的每一组N相编码数据项 由收集部获得的磁共振信号，处理在重构部分获得的重构图像的图像处理部分，输出在图像处理部分获得的处理图像的图像输出部分和改变相位数目的变化部分 编码在重组部分重组的N个相位编码数据项中更新的数据项，同时收集部分正在操作。

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。