公开(公告)号：US6157696A

公开(公告)日：2000-12-05

申请号：US891709

申请日：1997-07-09

申请人： Yasuo Saito ,  Kazuyuki Ihira ,  Katsuyuki Taguchi ,  Tatsuro Suzuki ,  Hiroaki Miyazaki ,  Koichi Muraki ,  Hiroshi Aradate

发明人： Yasuo Saito ,  Kazuyuki Ihira ,  Katsuyuki Taguchi ,  Tatsuro Suzuki ,  Hiroaki Miyazaki ,  Koichi Muraki ,  Hiroshi Aradate

IPC分类号： A61B6/03 ,  H05G1/60

CPC分类号： A61B6/5205 ,  A61B6/032 ,  A61B6/583

摘要： A multi-slice X-ray CT scanner is provided to realize high resolution and a wide scanned region in a slice-thickness direction for an object. In the X-ray CT scanner, an X-ray beam for slice imaging is radiated toward an object and scanned in a predetermined slice-thickness direction, a direction orthogonal to the slice-thickness direction being defined as a channel direction. The scanner comprises a two-dimensional X-ray detector, a data acquisition system, and an electrically combining unit. The detector has a plurality of X-ray detecting elements arranged in a two-dimensional array of both rows in the slice-thickness direction and columns in the channel direction, the detecting elements of each row being arranged in unequal pitches. The data acquisition system has a plurality of data acquiring elements arranged in a two-dimensional array of rows and columns, acquiring signals detected by the two-dimensional X-ray detector, and producing digital data proportional to the detected signals. The electrically combining unit electrically combines more than two columns of all the columns in the array of the X-ray detecting elements into at least two columns of all the columns in the array of the data acquiring elements in accordance with a given slice imaging condition. For example, each row of the array of the data acquiring elements are less in number of elements than each row of the array of the X-ray detecting elements.

摘要翻译： 提供了一种多切片X射线CT扫描器，以实现对于物体的切片厚度方向的高分辨率和宽扫描区域。 在X射线CT扫描器中，将用于切片成像的X射线束朝向物体照射，并且以预定的切片厚度方向扫描，与切片厚度方向正交的方向被定义为通道方向。 扫描仪包括二维X射线检测器，数据采集系统和电合成单元。 检测器具有多个X射线检测元件，其排列成层厚方向的两列的二维阵列，并且在通道方向上具有列，每行的检测元件以不等间距排列。 数据采集​​系统具有排列成行和列的二维阵列的多个数据获取元件，获取由二维X射线检测器检测的信号，并产生与检测信号成比例的数字数据。 电合成单元根据给定的切片成像条件将X射线检测元件的阵列中的所有列的两列以上的列全部电合成数据获取元件的阵列中的所有列的至少两列。 例如，数据获取元件的阵列的每行比X射线检测元件的阵列的每一行的元素数量少。

公开(公告)号：US5323439A

公开(公告)日：1994-06-21

申请号：US831912

申请日：1992-02-06

申请人： Yasuo Nobuta ,  Koichi Muraki

发明人： Yasuo Nobuta ,  Koichi Muraki

IPC分类号： G06T1/00 ,  A61B6/00

CPC分类号： G06T1/0007

摘要： In an X-ray CT (computerized tomographic) imaging system, a plurality of X-ray detectors, data acquisition circuitry and an image reconstruction unit are provided. The data acquisition circuitry includes a plurality of A/D converter units. The X-ray image signals derived from the plurality of X-ray detectors are A/D-converted by the corresponding ones of the A/D converter units into corresponding X-ray image data. Then, the X-ray image data obtained from the respective A/D converter units is sequentially transferred via a digital data bus to the image reconstruction unit.

摘要翻译： 在X射线CT（计算机断层摄影）成像系统中，提供了多个X射线检测器，数据采集电路和图像重构单元。 数据采集​​电路包括多个A / D转换器单元。 从多个X射线检测器得到的X射线图像信号由对应的A / D转换器单元进行A / D转换为相应的X射线图像数据。 然后，从各个A / D转换器单元获得的X射线图像数据经由数字数据总线顺序传送到图像重构单元。