Yokogawa Medical Systems, Limited

Hideya Akasaka

Yasuhito Takeuchi

Shinichi Sano

Takao Higashiizumi

Takao Jibiki

Yuichi Hirota

Toshikatsu Kodama

A diagnostic imaging apparatus is disclosed in which an ultrasonic wave transmit/receive apparatus is used in common for both 2-dimensional B-mode imaging and for measurement of pulsed Doppler signals, by time sharing operation. The good real time characteristics of 2-dimensional B-mode imaging are retained, together with a sufficiently high data rate for pulsed Doppler measurement, through use of simple means for performing interpolation in the Doppler signals Ultrasonic wave transmit/receive means (21,23 to 25,27) repetitively execute combinations of ultrasonic wave transmit/receive sequences, each combination consisting of a plurality of pulsed Doppler mode ultrasonic wave transmit/receive sequences and a single 2-dimensional B-mode imaging ultrasonic wave transmit/receive sequence. Demodulator means (38 to 41) demodulate the Doppler signals, based on the received signals that are acquired during the pulsed Doppler mode ultrasonic wave transmit/receive sequences. Sampling means (42 to 44) perform range gate sampling of the demodulated Doppler signals, and interpolation means (45) interpolate sampling values into the Doppler signal to replace sampling values which are lost during execution of the 2-dimensional B-mode imagaing ultrasonic wave transmit/receive sequences. Doppler signal processing means (46 to 48 ) perform processing of the sampling signals following interpolation. 2-dimensional B-mode imaging means process the received signal that is acquired by the 2-dimensional B-mode imaging sequences.

Diagnostic imaging apparatus

Ultrasonic delay line matrix switch check system

Growing community of inventors

Tokyo, Japan

Hideya Akasaka