| 摘要 |
An ultrasonic measuring apparatus that includes an ultrasonic transducer for emitting ultrasonic pulses at a predetermined repetition frequency towards an object having a plurality of walls such as a blood vessel, receiving echoes reflected from such walls, and producing an echo signal having a plurality of elementary echo components (Eant, Epost). A digitizer digitizes the echo signal into a series of digital values that are stored in a buffer memory under control of a circuit. A computer transfers the series of digital values stored in the buffer memory into a memory. The computer is programmed to process the digital values stored in the memory in the period between consecutive pulses and to remove a group of the digital values digitized between consecutive elementary components (Eant, Epost) from those digital values to be treated between such consecutive pulses.
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