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Patent Searching and Data


Title:
ULTRASONIC DIAGNOSTIC DEVICE
Document Type and Number:
Japanese Patent JP2003000596
Kind Code:
A
Abstract:

To remove a fundamental frequency component without lowering a frame rate in an ultrasonic diagnostic device.

Between an ultrasonic receiving part and a digital scan converter in the ultrasonic diagnostic device, an A/D converter for converting an echo signal to a digital signal, a delay circuit 1 for applying arbitrary delay time to the output of this A/D converter, a phase control circuit 6 for variably controlling the phase of the output of this delay circuit, an arithmetic circuit 2 for operating delay data to be applied to the delay circuit 1 and the phase control circuit 6 from the echo signal and a signal synthesizing means 3 for synthesizing the echo signal and the output signal of the phase control circuit, removing the basic wave component from the echo signal and extracting/ emphasizing a higher harmonic component are provided.


Inventors:
ASAFUSA KATSUNORI
SHINOMURA RYUICHI
Application Number:
JP2001000192404
Publication Date:
January 07, 2003
Filing Date:
June 26, 2001
Export Citation:
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Assignee:
HITACHI MEDICAL CORP
International Classes:
A61B8/06; A61B8/08; (IPC1-7): A61B8/06; A61B8/08
Domestic Patent References:
JPH04194771A1992-07-14
JPH05184568A1993-07-27
JPH09131344A1997-05-20