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1. 发明申请

US20090103102A1 SYSTEMS AND METHODS FOR DIGITAL DETECTION OF A TOMOGRAPHIC SIGNAL 有权
标题翻译：用于数字检测图像信号的系统和方法
公开(公告)号：US20090103102A1
公开(公告)日：2009-04-23
申请号：US12257825
申请日：2008-10-24
申请人： Joseph M. LASKER , Andreas HIELSCHER , James M. MASCIOTTI , Christoph H. SCHMITZ , Matthew SCHOENECKER
发明人： Joseph M. LASKER , Andreas HIELSCHER , James M. MASCIOTTI , Christoph H. SCHMITZ , Matthew SCHOENECKER
IPC分类号： G01B11/02
CPC分类号： G01N21/4795
摘要： Systems and methods for digital detection of an analog tomographic signal are described. The methods include receiving an amplitude-modulated analog signal containing tomographic information, the analog signal having a modulation frequency, fλi; and converting the analog signal into a digital signal at a sampling frequency, fs, to produce a number of samples, K. The digital signal is multiplied by an in-phase reference signal to obtain an in-phase signal component, the in-phase reference signal having the frequency, fλi; and the digital signal is multiplied by a quadrature reference signal to obtain a quadrature signal component, the quadrature reference signal having the frequency, fλi. The in-phase signal component and the quadrature signal component are passed through the K-point averaging filter. A signal amplitude is computed based on the filtered in-phase signal component and the filtered quadrature signal component, the signal amplitude being representative of the tomographic information.
摘要翻译：描述了用于模拟断层信号的数字检测的系统和方法。所述方法包括接收包含断层图像信息的幅度调制模拟信号，所述模拟信号具有调制频率flambdai; 并以采样频率fs将模拟信号转换为数字信号，以产生多个采样K.将数字信号乘以同相参考信号以获得同相信号分量，同相信号参考信号具有频率，flambdai; 并且数字信号乘以正交参考信号以获得正交信号分量，正交参考信号具有频率，flambdai。同相信号分量和正交信号分量通过K点平均滤波器。基于滤波的同相信号分量和滤波的正交信号分量来计算信号幅度，信号振幅代表层析信息。

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