发明名称 |
ULTRASONIC WAVE PULSE ECHO DEVICE AND ULTRASONIC DIAGNOSTIC DEVICE USING SAID DEVICE |
摘要 |
PURPOSE: To enable to prevent reduction of a frequency depending on the depth of a measurement object by utilizing all information components existing in the band of echo signals in measurement of a fluid flow by pulse Doppler signal transmission. CONSTITUTION: An ultrasonic pulse is generated from an operation head 10 in a fan shaped area 26 of a patient and an echo returning to the sample volume of the patient is made into a numeric by a receiver 14 to be an independent echo sample. The echo signal made into a numeric is properly delayed by a beam former 16 and weighted, then is stored in one longitudinal array of a two-dimensions array store 22. Products of samples neighboring each other in each longitudinal direction of the array are calculated by a row autocorrelation device 34 to obtain a secondary autocorrelation function and the speed of the sample volume is estimated by a speed processing device 36 based on the output of those correlation devices 32, 34 to be utilized in image processing. |
申请公布号 |
JPH07250835(A) |
申请公布日期 |
1995.10.03 |
申请号 |
JP19940283920 |
申请日期 |
1994.10.25 |
申请人 |
ADVANCED TECHNOL LAB INC |
发明人 |
JIEFURII II PAWAAZU;SANASHISU RUUPASU |
分类号 |
A61B8/06;G01S7/52;G01S15/52;G01S15/58;G01S15/89;(IPC1-7):A61B8/06 |
主分类号 |
A61B8/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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