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21 条记录 (耗时 0.013 秒)

    Array processors for imaging methods and apparatus
    11.
    发明公开
    Array processors for imaging methods and apparatus 失效
    FeldrechnerfürBildverfahren undGeräte。

    公开(公告)号：EP0370792A2

    公开(公告)日：1990-05-30

    申请号：EP89312126.9

    申请日：1989-11-22

    申请人： PICKER INTERNATIONAL, INC.

    发明人： Brunnett, Carl J. ,  Gocal, Beverly M. ,  Vrettos, Chris J. ,  Hyland, Paul J. ,  Kerber, Michael M. ,  Pexa, James M. ,  Sidoti, John

    IPC分类号： G06F15/80 ,  G06T1/20

    CPC分类号： G06F15/8015 ,  G06T1/20

    摘要： An array processor wherein data coming out of an internal data memory device (22) is fed into a register file (24), and on the same clock cycle, three data results are coming out of an arithmetic unit (26, 28, 30) and feed back into the register file. Therefore, on a single clock cycle, five separate pieces of data are going into the register file. In the same clock cycle, other data coming out of the outputs of the register file (24) feed data into two separate floating arithmetic adders (26, 28) and one floating arithmetic multiplier (30). The arrangement allows a constant flow of data to be supplied to the arithmetic unit thereby using the arithmetic unit to its maximum functioning ability.

    摘要翻译： 一种阵列处理器，其中从内部数据存储装置（22）出来的数据被馈送到寄存器文件（24）中，并且在相同的时钟周期中，从运算单元（26,28,30）发出三个数据结果， 并反馈到寄存器文件。 因此，在单个时钟周期中，五个单独的数据将进入寄存器文件。 在相同的时钟周期中，从寄存器文件（24）输出的其他数据将数据馈送到两个分离的浮动算术加法器（26,28）和一个浮动算术乘法器（30）。 该布置允许将数据的恒定流量提供给算术单元，从而使用算术单元达到其最大功能能力。

    Improved filter for data processing
    12.
    发明公开
    Improved filter for data processing 失效
    改进的数据处理过滤器

    公开(公告)号：EP0195869A3

    公开(公告)日：1988-01-20

    申请号：EP85309395

    申请日：1985-12-20

    申请人： PICKER INTERNATIONAL, INC.

    发明人： Kerber, Michael M. ,  Brunnett, Carl J.

    IPC分类号： G06F15/62

    CPC分类号： G06T11/006 ,  G06T5/10 ,  G06T5/20 ,  G06T2207/10081 ,  G06T2207/20056 ,  G06T2211/421

    摘要： An imaging method and apparatus having a new and improved data filter. In one application of the invention computed tomography number inaccuracies are avoided by use of a new filter function derived from discrete points of a truncated spatial domain convolution filter. The points from the truncated convolution filter are fourier transformed to yield a ramp filter with ripple in the spatial frequency domain. Data from a CT scan is filtered with this new filter function and back projected to produce images that do not exhibit CT number inaccuracies.

    Diagnostic imaging apparatus
    19.
    发明公开
    Diagnostic imaging apparatus 失效
    Diagnosebildgerät。

    公开(公告)号：EP0370829A2

    公开(公告)日：1990-05-30

    申请号：EP89312231.7

    申请日：1989-11-24

    申请人： PICKER INTERNATIONAL, INC.

    发明人： Brunnett, Carl J. ,  Heiple, Holly C. ,  Zachary, Allen B.

    IPC分类号： G06T1/20

    CPC分类号： G06T11/006

    摘要： A CT scanner (10) generates views of data such as equal angular increment detector fan views (Figure 2A) which are convolved or filtered by an array processor (24). A combined backprojector and forward projector (28) backprojects the data from the array processor into an output memory (30) and forward projects lines of image representation data from an input memory (26) to the output memory. Each view representation may again be an equal angular increment detector fan format view (Figure 2A), a parallel ray format view (Figure 2B), an equal linear increment source fan format view (Figure 2D), a source fan format view (Figure 2C), an equal angular incremental detector fan format view (Figure 2E), an equal linear increment detector fan format view (Figure 2F), or an equal angular increment source fan format view (Figure 2G). In a backprojector mode, the projector is addressed by line and row addresses of a pixel of the output memory. A look-up table (76) and a multiplier (82) generate a weighting function (W). A multiplier (78) and an adding means (80) along with the look-up table convert the memory addresses into an appropriate address for a line of view data stored in a projector memory (60). An element of view data retrieved in response to the received address is multiplied (84) by the weighting function. In a forward projector mode, a parallel ray forward projection configuration (92) is provided. A view format transform assembly (90) transforms other format view designations and addresses into the corresponding parallel ray format view designations and addresses.

    摘要翻译： CT扫描器（10）产生数据的视图，例如由阵列处理器（24）进行卷积或滤波的等角度增量检测器风扇视图（图2A）。 组合的后投影仪和前投影机（28）将来自阵列处理器的数据反向投影到输出存储器（30）中，并将投影线图像表示数据从输入存储器（26）转发到输出存储器。 每个视图表示可以再次是相等的角度增量检测器风扇格式视图（图2A），平行光线格式视图（图2B），相等的线性增量源风扇格式视图（图2D），源风扇格式视图（图2C ），等角度增量检测器风扇格式视图（图2E），相等的线性增量检测器风扇格式视图（图2F）或相等角度增量源风扇格式视图（图2G）。 在反投影仪模式下，投影机由输出存储器的像素的行和行地址寻址。 查找表（76）和乘法器（82）产生加权函数（W）。 与查找表一起的乘法器（78）和加法装置（80）将存储器地址转换为存储在投影仪存储器（60）中的视线数据的适当地址。 通过加权函数将响应于接收到的地址检索的视图数据的元素乘以（84）。 在前投投影模式中，提供平行射线向前投影配置（92）。 视图格式转换组件（90）将其他格式视图名称和地址转换为相应的并行光线格式视图指定和地址。

    Method and apparatus for computed tomography imaging
    20.
    发明公开
    Method and apparatus for computed tomography imaging 失效
    用于计算机图像成像的方法和装置

    公开(公告)号：EP0109205A3

    公开(公告)日：1985-07-31

    申请号：EP83306359

    申请日：1983-10-19

    申请人： PICKER INTERNATIONAL, INC.

    发明人： DeMeester, Gordon D. ,  Brunnett, Carl J. ,  Kenue, Surender K.

    IPC分类号： A61B06/02

    CPC分类号： A61B6/4488 ,  A61B6/032 ,  A61B6/4275

    摘要： Method and apparatus for approximating x-ray detector data from a malfunctioning computed tomography detector. A view of data is gathered for each of a plurality of detectors in a stationary detector scanner. Data from malfunctioning detectors is approximated by averaging the data from closely adjacent detectors after a preferred gradient is chosen to establish which detector data is to be averaged.

    摘要翻译： 用于从故障的计算机断层摄影检测器近似X射线检测器数据的方法和装置。 针对固定检测器扫描器中的多个检测器中的每一个收集数据的视图。 在选择优选的梯度以确定要对哪个检测器数据进行平均后，来自故障检测器的数据近似于对来自紧邻的检测器的数据进行平均。