公开(公告)号：US20120101355A1

公开(公告)日：2012-04-26

申请号：US13305610

申请日：2011-11-28

申请人： Venugopal GOPINATHAN ,  Raghavan SUBRAMANIYAN ,  Goutam DUTTA ,  Nitin PATIL ,  Abhijit PATKI

发明人： Venugopal GOPINATHAN ,  Raghavan SUBRAMANIYAN ,  Goutam DUTTA ,  Nitin PATIL ,  Abhijit PATKI

IPC分类号： A61B5/04 ,  A61B5/053

CPC分类号： A61B5/1075 ,  A61B5/02007 ,  A61B5/0538 ,  A61B5/064 ,  A61B5/066 ,  A61B5/068 ,  A61B5/1076 ,  A61B5/1079 ,  A61B5/4851 ,  A61B5/489 ,  A61B5/6851 ,  A61B5/6852 ,  A61B5/6853 ,  A61B5/7271 ,  A61B6/504 ,  A61B6/5211 ,  A61B6/541 ,  A61B8/565 ,  A61B8/582 ,  A61B2034/2065 ,  A61B2090/061 ,  A61B2090/3966 ,  A61B2090/3983 ,  A61B2505/05 ,  A61B2562/043 ,  A61B2562/08 ,  A61M2025/0166 ,  G06T7/246 ,  G06T2207/10116 ,  G06T2207/30021 ,  G06T2207/30101 ,  G06T2207/30204 ,  G06T2207/30241

摘要： Methods and systems for determining information about a vascular bodily lumen are described. An exemplary method includes generating an electrical signal, delivering the electrical signal to a plurality of excitation elements in the vicinity of the vascular bodily lumen, measuring a responsive electrical signal from a plurality of sensing elements in response to the delivered electrical signal, and determining a lumen dimension. Specific embodiments include generating a multiple frequency electrical signal. Another embodiment includes measuring a plurality of responsive signals at a plurality of frequencies. Still other embodiments include using spatial diversity of the excitation elements. Yet other embodiments use method for calibration and de-embedding of such measurements to determine the lumen dimensions. Diagnostic devices incorporating the method are also disclosed, including guide wires, catheters and implants. The methods and systems described herein are advantageous as they do not include injecting a second fluid for the measurements.

摘要翻译： 描述了用于确定关于血管体内腔的信息的方法和系统。 一种示例性方法包括产生电信号，将电信号传送到血管体腔附近的多个激励元件，响应于输送的电信号测量来自多个感测元件的响应电信号，以及确定 流明尺寸。 具体实施例包括产生多频电信号。 另一实施例包括以多个频率测量多个响应信号。 其他实施例包括使用激励元件的空间分集。 其他实施例使用用于校准和解嵌这些测量以确定管腔尺寸的方法。 还公开了包括引导线，导管和植入物的包括该方法的诊断装置。 本文描述的方法和系统是有利的，因为它们不包括为测量注入第二流体。

公开(公告)号：US20070069937A1

公开(公告)日：2007-03-29

申请号：US11309081

申请日：2006-06-16

申请人： Jaiganesh BALAKRISHNAN ,  Venugopal GOPINATHAN ,  Sthanunathan RAMAKRISHNAN

发明人： Jaiganesh BALAKRISHNAN ,  Venugopal GOPINATHAN ,  Sthanunathan RAMAKRISHNAN

IPC分类号： H03M1/38

CPC分类号： H03M1/1028 ,  H03M1/0624 ,  H03M1/1215

摘要： Interleaved analog to digital converter with compensation for parameter mismatch among individual converters. A reference ADC samples an input signal at substantially the same time instances as an individual converter used in the interleaved ADC. The reference values provided by the reference ADC are compared with the digital codes generated by the converter to generate an error value from which estimates of the gain, DC offset and timing errors are computed using statistical techniques. Timing error thus estimated is used to change the phase of the sampling clock provided to the converter, and the gain and DC offset errors estimated are applied to modify the values of reference voltages applied to the converter, thus compensating for parameter mismatches.

摘要翻译： 交错模数转换器，补偿各转换器之间的参数失配。 参考ADC在与交错ADC中使用的单独转换器基本相同的时间实例处采样输入信号。 由参考ADC提供的参考值与由转换器产生的数字代码进行比较，以产生误差值，利用统计技术来计算增益，直流偏移和定时误差的估计。 使用如此估计的定时误差来改变提供给转换器的采样时钟的相位，并且应用估计的增益和DC偏移误差来修改施加到转换器的参考电压的值，从而补偿参数失配。