Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Reexamination Certificate
2005-04-12
2005-04-12
Jaworski, Francis J. (Department: 3737)
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
Reexamination Certificate
active
06878113
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.
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Baba Hirotaka
Fujita Naoto
Miwa Yuichi
Shinomura Ryuichi
Umemura Shin'ichiro
Hitachi Medical Corporation
Jaworski Francis J.
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