发明名称 |
Slewing bandpass filter for ultrasound image analysis and methods |
摘要 |
An ultrasound imaging system with a slewing bandpass filter is disclosed for selective passage of time varying acoustic signals. The bandpass filter includes an input node to receive unprocessed signals at a certain frequency, with the unprocessed signals constituting an input signal. A signal source is configured to provide a reference signal, and a mixer is configured to receive the input signal and the reference signal, and to mix the input signal and the reference signal to a desired frequency range. A fixed bandpass filter is configured to have a passband frequency above or below the frequency range and to provide a filtered output signal with a scannable bandwidth passband characteristic useful for examining the time varying characteristics of the input signal. A controller is provided to control the signal source in accordance with time-varying characteristics of interest.
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申请公布号 |
US6315725(B1) |
申请公布日期 |
2001.11.13 |
申请号 |
US19990443165 |
申请日期 |
1999.11.19 |
申请人 |
SCIMED LIFE SYSTEMS, INC. |
发明人 |
MASTERS DONALD |
分类号 |
A61B8/12;A61B8/06;G01S7/52;G01S7/526;G01S15/89;H04B1/26;(IPC1-7):A61B8/00 |
主分类号 |
A61B8/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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