Title:
超音波診断装置及び超音波信号の処理方法
Document Type and Number:
Japanese Patent JP4177955
Kind Code:
B2
Abstract:
An ultrasonic diagnostic apparatus acquires images different in a frequency. The invention is composed of a transducer including plural elements for sending an ultrasonic wave and receiving the reflected ultrasonic wave, analog to digital converters that digitize plural received signals, first mixers that respectively multiply a signal from the converter and a first digital reference signal, first filters that respectively extract a signal having a predetermined center frequency from a signal from each first mixer, digital delay units that respectively delay a signal from each first filter, an adder that adds plural signals from the digital delay units, and a second mixer that multiplies a signal from the adder and a second digital reference signal. An envelope detector detects a signal from the second mixer, and a scan converter converts a signal from the detector to a picture signal for display, so the pass band of the filter is not required to be changed.
Inventors:
Yuichi Sanwa
Shinichiro Umemura
Shinomura Taka 1
Hirotaka Baba
Naoto Fujita
Shinichiro Umemura
Shinomura Taka 1
Hirotaka Baba
Naoto Fujita
Application Number:
JP2000265992A
Publication Date:
November 05, 2008
Filing Date:
August 30, 2000
Export Citation:
Assignee:
Hitachi Medical Co., Ltd.
International Classes:
A61B8/00; G01S7/52; G01S15/89
Domestic Patent References:
| JP6448513A | ||||
| JP6313764A | ||||
| JP9184826A | ||||
| JP11169365A |
Attorney, Agent or Firm:
Polaire Patent Business Corporation
Katsuo Ogawa
Kyosuke Tanaka
Katsuo Ogawa
Kyosuke Tanaka
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