Patent ID: 6315722
Filing Date: 2001-11-13
Classification: G01S

Abstract:
Ultrasonic diagnostic device comprising:an ADC that transmits ultrasonic waves to a subject by exciting an ultrasonic transducer built into a catheter and converts signals obtained as the waves are reflected by said subject to digital format;a time axis extension unit that is capable of writing the data received from said ADC and reading said data at a frequency lower than a frequency used during the time of writing;a data compression unit that compresses the data read by said time axis extension unit;a memory unit that stores the data compressed by said data compression unit; anda data expanding unit that expands the compressed data stored in said memory unit;wherein optimum images can be displayed most suitable for diagnosis by means of filtering and logarithmically converting the data expanded by said data expanding unit before inputting the data into a digital scan converter.