| 摘要 |
An object of the invention is to provide an ultrasonic diagnostic apparatus that can conduct elastic modulus measurement with high accuracy without enlarging the circuit scale. A calculator 3 uses a signal from a receiver-transmitter 2 to calculate the motion velocity or the move displacement of body tissue and the strain variation of the body tissue. A frequency analyzer 4 conducts frequency analysis of the motion velocity and the move displacement of the body tissue found in the calculator 3. A strain induced by stress and elastic wave separator 5 separates a frequency component with strain of an arterial wall caused by blood pressure change caused by pulsation of the heart, a frequency component of vibration caused by flow of blood into the lumen of artery, and a frequency component of noise based on the determination result of the frequency analyzer 4. An elastic modulus calculator 6 calculates the elastic modulus of the body tissue based on the calculation result of the motion of the body tissue obtained in the calculator 3, etc.
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