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KMID : 0372919850060010031
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Journal of Biomedical Engineering Research
1985 Volume.6 No. 1 p.31 ~ p.36
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Digital Signal Processing for Improvement of Resolution in A-mode
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Abstract
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In this paper, we describe the digital signal-processing for ultrasonic echo signals for the improvement of range resolution. The problem is to find the magnitude of analytic signals that are consistent with the arrival-rate of energy. It is also baaed upon the fact that the shapes of echo signals do not change, although the ampli- tudes and widths of the echo signals become smaller and wider than those of the transmitted signals. We have made the improvement in range resolution by using the quadrature-low pass filter and the area filter which are made on the basis of the theory discussed above.
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