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公开(公告)号：US20210196231A1
公开(公告)日：2021-07-01
申请号：US16731047
申请日：2019-12-31
Applicant: Industrial Technology Research Institute
Inventor： Guo-Zua Wu , Yuan-Mao Hung , Ken-Tsu Hu
Abstract: A method for detecting vascular obstruction and a system using the same are provided. The method includes steps of: detecting a blood vessel through a probe to generate a reference signal before the blood vessel is obstructed, wherein the probe is configured to transmit or receive ultrasonic waves; detecting the blood vessel through the probe to generate a detection signal; performing Fourier transformation on the reference signal to generate a reference power spectrum, and performing Fourier transformation on the detection signal to generate a detection power spectrum; transforming the reference power spectrum into a reference time-frequency spectrogram, and transforming the detection power spectrum into a detection time-frequency spectrogram; judging a similarity between the reference time-frequency spectrogram and the detection time-frequency spectrogram, and judging whether the blood vessel is obstructed or not according to the similarity.
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公开(公告)号：US20190129020A1
公开(公告)日：2019-05-02
申请号：US15853829
申请日：2017-12-24
Applicant: Industrial Technology Research Institute
Inventor： Yung-Shun Huang , Yuan-Mao Hung , Ming-Che Lin , Yi-Hsin Lin
Abstract: An ultrasonic system and an ultrasonic method with adaptive overflow and gain control are provided. The present disclosure uses two-stage gain controls to improve the signal-to-noise ratio (SNR) and to achieve the correct analysis of results. The first stage adopts an analog gain, and monitors whether the signal may overflow or its signal strength is too weak, and adjusts the gain value as large as possible, without causing overflow in order to improve the SNR. The second stage adopts a digital gain. In the second stage, all the amplified gain-containing data adjusted in the first stage are received, and an amplified gain-containing data segment is sequentially retrieved in chronological order, and the amplified gain-containing data segment is converted into a same-gain data segment having the same gain. Finally, the same-gain data segment is provided to a Doppler signal analyzer for analysis.
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公开(公告)号：US11284856B2
公开(公告)日：2022-03-29
申请号：US16731047
申请日：2019-12-31
Applicant: Industrial Technology Research Institute
Inventor： Guo-Zua Wu , Yuan-Mao Hung , Ken-Tsu Hu
Abstract: A method for detecting vascular obstruction and a system using the same are provided. The method includes steps of: detecting a blood vessel through a probe to generate a reference signal before the blood vessel is obstructed, wherein the probe is configured to transmit or receive ultrasonic waves; detecting the blood vessel through the probe to generate a detection signal; performing Fourier transformation on the reference signal to generate a reference power spectrum, and performing Fourier transformation on the detection signal to generate a detection power spectrum; transforming the reference power spectrum into a reference time-frequency spectrogram, and transforming the detection power spectrum into a detection time-frequency spectrogram; judging a similarity between the reference time-frequency spectrogram and the detection time-frequency spectrogram, and judging whether the blood vessel is obstructed or not according to the similarity.
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