会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 17. 发明专利
    • ULTRASONIC DIAGNOSTIC DEVICE
    • JPH03286750A
    • 1991-12-17
    • JP8855290
    • 1990-04-03
    • NAKAYAMA KIYOSHIFUJITSU LTD
    • NAKAYAMA KIYOSHI
    • G01N29/06A61B8/00G01N29/04G01N29/22G01N29/44
    • PURPOSE:To highly maintain the frame rate, to obtain uniform beam width in the distance direction, and also, to obtain a high picture quality in any patient by providing a means for estimating a transfer characteristics of a two-dimensional point expansion function of the ultrasonic scanning face from plural ultrasonic receiving waves, and convoluting an impulse response of a two-dimensional shaping filter to plural receiving waves. CONSTITUTION:A transfer characteristic of a target function is divided by a transfer characteristic of a two-dimensional point expansion function by a divider 2-1, and an impulse response of a two-dimensional shaping filter is calculated by a high speed two-dimensional reverse Fourier-converter 2-2, and recorded temporarily in a memory 2-3. Subsequently, while reading out a series of values in the distance direction of the impulse response of the two-dimensional shaping filter from the memory 2-3, and while setting it to a coefficient of a one-dimensional time-varying filter 3-1, an ultrasonic receiving wave read out in the distance direction from a frame memory is allowed to pass through the one-dimensional time-varying filter 3-1 and recorded in a frame memory 3-2.