公开(公告)号：US5089777A

公开(公告)日：1992-02-18

申请号：US533593

申请日：1990-06-05

申请人： Mitsutoshi Iino ,  Shirou Nakato ,  Seiichi Shinkai ,  Hideki Shimojima ,  Hiromi Kawaguchi

发明人： Mitsutoshi Iino ,  Shirou Nakato ,  Seiichi Shinkai ,  Hideki Shimojima ,  Hiromi Kawaguchi

IPC分类号： A61B5/055 ,  G01R33/48 ,  G01R33/561

CPC分类号： G01R33/561

摘要： When a two-dimensional Fourier transform is used, a magnetic resonance imaging apparatus has a first arithmetic unit for executing the Fourier transform in a first dimension in the repetition time interval immediately after each data acquisition or in parallel with the data acquisition, and a second arithmetic unit for executing the Fourier transform in a second dimension after all the data has been acquired. When a three-dimensional Fourier transform is used, the apparatus has a first arithmetic unit for executing the Fourier transform in a first dimension in the time interval immediately after each data acquisition or in parallel with the data acquisition, a second arithmetic unit for executing the Fourier transform in a second dimension immediately after the data acquisition of one matrix in the phase encoding direction, and a third arithmetic unit for executing the Fourier transform in a third dimension after all the data are acquired.

摘要翻译： 当使用二维傅里叶变换时，磁共振成像装置具有第一运算单元，用于在每次数据采集之后或与数据采集并行的情况下，在重复时间间隔中的第一维中执行傅立叶变换， 算术单元，用于在获取所有数据之后在第二维度中执行傅里叶变换。 当使用三维傅里叶变换时，该装置具有第一运算单元，用于在每个数据采集之后的时间间隔或与数据采集并行地执行第一维中的傅立叶变换;第二运算单元，用于执行 在相位编码方向上的一个矩阵的数据采集之后立即在第二维中进行傅立叶变换，以及第三运算单元，用于在获取所有数据之后的第三维中执行傅里叶变换。

公开(公告)号：US6122257A

公开(公告)日：2000-09-19

申请号：US815854

申请日：1997-03-12

申请人： Naoyoshi Machida ,  Toshihito Ochi ,  Hiromi Kawaguchi ,  Mineo Ogino ,  Masahiko Kurata ,  Masato Tachibana ,  Tadayuki Ichiba

发明人： Naoyoshi Machida ,  Toshihito Ochi ,  Hiromi Kawaguchi ,  Mineo Ogino ,  Masahiko Kurata ,  Masato Tachibana ,  Tadayuki Ichiba

IPC分类号： H04L12/24 ,  H04L12/26 ,  H04J1/16 ,  G01S13/32

CPC分类号： H04L12/2697 ,  H04L43/50 ,  H04L41/12

摘要： In a bus type LAN, the data transmitted from a terminal (14) is detected by an adapter (1) connected to one end of a bus (3), and in response thereto the adapter (1) transmits a pulse signal onto the bus (3). An adapter (2) connected to the other end of the bus (3) receives the data transmitted from the terminal (14) and detects its source terminal address. A difference in time between the arrival of the data from the terminal (14) and the arrival of the pulse signal from the adapter (1) is measured by a counter circuit (21), and the count value obtained is stored in a memory (23), forming a pair with the corresponding source terminal address. Thus, the count value can be obtained for each terminal during the normal operation of the LAN. The data of the memory (23) are extracted by a personal computer (5), where the physical position of each terminal is calculated in accordance with the bus propagation velocity, and is displayed or printed out as a physical constitution diagram. Also, the packet signal, its collision signal, the jam signal and the pulse signal are utilized to measure the difference in time for the arrival of the pulse signal and so forth, to thereby specify the terminal having caused the packet collision.

摘要翻译： PCT No.PCT / JP95 / 01803 Sec。 371日期1997年3月12日 102（e）1997年3月12日PCT PCT 1995年9月12日PCT公布。 公开号WO96 / 08897 日期1996年3月21日在总线型LAN中，从连接到总线（3）的一端的适配器（1）检测从终端（14）发送的数据，并且响应于适配器（1）发送 脉冲信号到总线上（3）。 连接到总线（3）的另一端的适配器（2）接收从终端（14）发送的数据并检测其源终端地址。 通过计数器电路（21）测量来自终端（14）的数据的到达与来自适配器（1）的脉冲信号的到达之间的时间差，将获得的计数值存储在存储器 23），与对应的源终端地址形成一对。 因此，在LAN的正常操作期间可以为每个终端获得计数值。 存储器（23）的数据由个人计算机（5）提取，其中根据总线传播速度计算每个终端的物理位置，并作为物理结构图被显示或打印出来。 此外，分组信号，其冲突信号，阻塞信号和脉冲信号用于测量脉冲信号等到达时间的差异，从而指定引起分组冲突的终端。

公开(公告)号：US5119026A

公开(公告)日：1992-06-02

申请号：US460112

申请日：1990-05-03

申请人： Mitsutoshi Iino ,  Shirou Nakatao ,  Hiromi Kawaguchi ,  Masaru Tanaka ,  Toshiaki Yonekura

发明人： Mitsutoshi Iino ,  Shirou Nakatao ,  Hiromi Kawaguchi ,  Masaru Tanaka ,  Toshiaki Yonekura

IPC分类号： A61B5/055 ,  G01N29/04 ,  G01R33/48 ,  G01R33/56

CPC分类号： G01R33/56 ,  G01N2291/048

摘要： An arrangement in a magnetic resonance imaging apparatus for producing image data of an object being examined. The object is subjected to magnetic fields and RF pulse signals which produce echo signals. The echo signals which represent views of the object are detected. Data collecting circuitry selectively performs a data collection process on the detected echo signals to produce collected data such that, for those echo signals of a relatively small strength, part of the data collection process is suppressed and, for those echo signals of a relatively great strength, the data collection process is performed a plurality of times under identical operating conditions. A data processor processes the collected data to produce view data such that, for the echo signals for which the data collection process has been suppressed, interpolation data is produced and, for the echo signals for which the data collection process has been performed a plurality of times, a summing and averaging operation is performed on the collected data. The data processor combines the interpolation data with the summed and averaged data thereby producing view data. An image constructor performs a Fourier transform on the view data thereby constructing image data.

摘要翻译： 用于产生被检查物体的图像数据的磁共振成像装置中的布置。 该物体受到产生回波信号的磁场和RF脉冲信号。 检测表示对象的视图的回波信号。 数据收集电路选择性地对检测到的回波信号执行数据收集处理，以产生收集的数据，使得对于相对较小强度的那些回波信号，数据收集过程的一部分被抑制，并且对于那些相对较强的回波信号 在相同的操作条件下进行多次数据采集处理。 数据处理器处理所收集的数据以产生视图数据，使得对于已经抑制了数据收集过程的回波信号，产生插值数据，并且对于已经执行了数据收集处理的回波信号， 次，对所收集的数据执行求和和平均操作。 数据处理器将插值数据与相加和平均数据组合，从而产生视图数据。 图像构造器对视图数据执行傅里叶变换，从而构建图像数据。