Ultrasonograph

摘要

An ultrasonograph capable of diagnosing a region of interest at high sensitivity is offered. The ultrasonograph comprises a sensor portion having a sending piezoelectric element for sending ultrasound toward the radial artery and a receiving piezoelectric element for receiving the ultrasound reflected from the radial artery, a belt for holding the sensor portion from its back side relative to the radial artery, and a processing portion for gaining the pulse wave and the pulse rate in the radial artery based on the reflected waves received by the receiving piezoelectric element and displaying them. The belt is provided with a recessed portion that is located opposite to the sensor portion and recessed relative to the sensor portion. The space between the sensor portion and the recessed portion functions as an ultrasound-attenuating portion.