公开(公告)号：US20120189158A1

公开(公告)日：2012-07-26

申请号：US13354587

申请日：2012-01-20

申请人： Ari P. BERMAN ,  Daniel NAAR

发明人： Ari P. BERMAN ,  Daniel NAAR

IPC分类号： G06K9/00

CPC分类号： G06T11/006 ,  G06T2211/421 ,  G06T2211/428

摘要： The disclosure relates generally to a method of three dimensional (3D) tomographic volume reconstruction for computed tomography (CT) using vector processors and more specifically to an optimized implementation which pre-computes back projection weights and perspective geometry data associated with a given CT device as down-sampled tables. The down-sampled perspective geometry data and the weight table are interpolated dynamically as part of the volume reconstruction process for an object scanned using the given CT device.

摘要翻译： 本公开总体上涉及使用向量处理器的计算机断层摄影（CT）的三维（3D）断层摄影体重建的方法，更具体地涉及预先计算与给定CT装置相关联的反投影权重和透视几何数据的优化实现 下采样表。 下采样透视几何数据和权重表被动态内插，作为使用给定CT设备扫描的对象的体重建过程的一部分。

公开(公告)号：US08494213B2

公开(公告)日：2013-07-23

申请号：US13354587

申请日：2012-01-20

申请人： Ari P. Berman ,  Daniel Naar

发明人： Ari P. Berman ,  Daniel Naar

IPC分类号： G06K9/00

CPC分类号： G06T11/006 ,  G06T2211/421 ,  G06T2211/428

摘要： The disclosure relates generally to a method of three dimensional (3D) tomographic volume reconstruction for computed tomography (CT) using vector processors and more specifically to an optimized implementation which pre-computes back projection weights and perspective geometry data associated with a given CT device as down-sampled tables. The down-sampled perspective geometry data and the weight table are interpolated dynamically as part of the volume reconstruction process for an object scanned using the given CT device.

摘要翻译： 本公开总体上涉及使用向量处理器的计算机断层摄影（CT）的三维（3D）断层摄影体重建的方法，更具体地涉及预先计算与给定CT装置相关联的反投影权重和透视几何数据的优化实现 下采样表。 下采样透视几何数据和权重表被动态内插，作为使用给定CT设备扫描的对象的体重建过程的一部分。

公开(公告)号：US5473759A

公开(公告)日：1995-12-05

申请号：US20785

申请日：1993-02-22

申请人： Malcolm Slaney ,  Richard F. Lyon ,  Daniel Naar

发明人： Malcolm Slaney ,  Richard F. Lyon ,  Daniel Naar

IPC分类号： G10L19/02 ,  G10L25/18 ,  G10L9/10

CPC分类号： G10L19/02 ,  G10L25/18

摘要： A system for reconstructing a signal waveform from a correlogram is based upon the recognition that the information in each channel of the correlogram is equivalent to the magnitude of the Fourier transform of a signal. By estimating a signal on the basis of its Short-Time Fourier Transform Magnitude, each channel of information from a cochlear model can be reconstructed. Once this information is retrieved, a signal waveform can be resynthesized through inversion of the cochlear model. The process for reconstructing the cochlear model data can be optimized with the use of techniques for improving the initial estimate of the signal from the magnitude of its Fourier Transform, and by employing information that is known apriori about the signal during the estimation process, such as the characteristics of sound signals.

摘要翻译： 用于从相关图重构信号波形的系统基于这样的认识：相关图的每个通道中的信息等于信号的傅立叶变换的幅度。 通过基于其短时傅里叶变换幅度估计信号，可以重构来自耳蜗模型的每个信道信道。 一旦检索到该信息，就可以通过人工耳蜗模型的反演来重新合成信号波形。 用于重建耳蜗模型数据的过程可以通过使用用于从其傅里叶变换的幅度改进信号的初始估计的技术以及通过在估计过程中使用关于信号的已知信息的技术来优化，例如 声音信号的特点。