ULTRASONIC DIAGNOSTIC DEVICE

摘要

PURPOSE:To realize the ultrasonic diagnostic device which can execute a scan so as to obtain a tomographic image of a body to be examined by transmitting and receiving a continuous wave by a CW Doppler system and executing transmission/reception by a B mode system, while measuring a moving speed of a reflecting body. CONSTITUTION:In a B mode system, a transmitting signal oscillator A2 generates s transmitting signal of a burst number (n) and a frequency fB and transmits it from a B mode probe 5 by a pulse input from a pulse oscillator 1. A receiving signal is filtered by a band pass filter A6 of a center frequency fB and band width (2/n) fB and outputted. In a CW Doppler system, a transmitting signal oscillator B 11 oscillates a signal of a frequency fD of fD ={1+(1/n)} fB and transmits it from a transmitting probe 13. A reflected wave is received by a receiving probe 14, filtered by a narrow band pass filter B16 of the center frequency fD and outputted.