ULTRASOUND DIAGNOSTIC APPARATUS AND METHOD OF CALIBRATING THE SAME

摘要

An ultrasound diagnostic apparatus (1) includes a discharge means (4) to apply discharge pulses between electrodes of an ultrasound transducer (20) a plurality of times, wherein the discharge pulses are alternatively reversed in polarity and not lower in peak than a Collapse voltage. The pulses accelerate the discharge of electric charges accumulated in vibration membranes of the ultrasound transducer (20), so that an offset sensitivity for transmitting and receiving can become rapidly close to 0. The discharge of the electric charges is performed in an instant. In other words, a DC bias is applied to swiftly carry out calibration for a sensitivity drift for transmitting and receiving due to the accumulation of the electric charges flowing into the vibration membranes between the electrodes.