ULTRASONIC DOPPLER DIAGNOSING UNIT AND METHOD FOR PROCESSING DOPPLER SIGNAL,申请号JP20010133483-传众专利搜索

ULTRASONIC DOPPLER DIAGNOSING UNIT AND METHOD FOR PROCESSING DOPPLER SIGNAL

申请公布号：JP2002325767(A)

申请号：JP20010133483

申请日期：2001.04.27

申请公布日期：2002.11.12

申请人：

TOSHIBA CORP

发明人：BABA TATSURO

分类号：A61B8/06;(IPC1-7):A61B8/06

主分类号：A61B8/06

摘要：PROBLEM TO BE SOLVED: To perform a directional separation to a Doppler signal by simplifying a hardware configuration and reducing an arithmetic processing by software. SOLUTION: An ultrasonic Doppler diagnosing instrument is provided with a directional separator 61 for separating a blood stream direction and outputting its result as a Doppler sound. The separator 61 is provided with a zero inserting unit 61A for inserting a zero value to a digital amount Doppler signal and permitting the number of data to be an N times (e.g. N=2) length in a time axial direction and two complex BPF 61B and 61C which are allocated in the blood stream directions respectively and perform complex band-pass filtering to the Doppler signal where the zero value is inserted with N-times sampling frequency of a sampling frequency before the insertion of the zero value to the Doppler signal as a sampling frequency. The signals subjected to complex band-pass filtering by the respective two complex BPF 61B and 61C are outputted as the Doppler sounds which are separated in a moving direction.