Power supply device for push wave generation

Abstract

To transmit a push wave having a sufficient magnitude to a biological tissue for elasticity measurement.SOLUTION: A power supply device 52 for push wave generation includes a positive electrode power supply 40 and a negative electrode power supply 46 as power supplies that output power supplied to a pulser circuit 54 to which an ultrasound oscillator 56 is connected. The power supply device 52 for push wave generation includes a positive electrode capacitor Cp and a negative electrode capacitor Cn as the capacitors to accumulate the power supplied from the positive electrode power supply 40 and the negative electrode power supply 46. The power supply device 52 for push wave generation further includes a variable constant voltage circuit 44, provided between the positive electrode capacitor Cp and the pulser circuit 54, and a variable constant voltage circuit 50, provided between the negative electrode capacitor Cn and the pulser circuit 54. The pulser circuit 54 outputs a positive / negative pulse voltage to the ultrasound oscillator 56 as a push wave transmission signal, and the ultrasound oscillator 56 transmits a push wave in response to the push wave transmission signal.SELECTED DRAWING: Figure 2

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