Ultrasound diagnostic apparatus

An ultrasonic diagnostic apparatus comprising:

• a transmitting/receiving unit configured to transmit an ultrasound wave to an object to be examined at a first rate in accordance with a first code, receive a first reception signal from the object, transmit an ultrasound wave to the object at a second rate in accordance with a second code complementary to the first code, and receive a second reception signal from the object;
• a first processor configured to convolute the second code in the first reception signal, convolute the first code in the second reception signal, and detect a phase difference between the two signals, the phase difference representing a motion of a tissue of the object between the first and second rates;
• a second processor configured to convolute the first and second codes in the first and second reception signals, respectively, add the two signals upon giving a time shift corresponding to the phase difference, and generate a third reception signal;
• and
• a unit configured to generate image data on the basis of the third reception signal.

An ultrasonic diagnostic apparatus comprising:

• a transmitting/receiving unit configured to transmit an ultrasound wave to an object to be examined at a first rate in accordance with a first code, receive a first reception signal from the object, transmit an ultrasound wave to the object at a second rate in accordance with a second code complementary to the first code, and receive a second reception signal from the object;
• a first processor configured to convolute the second code in the first reception signal, convolute the first code in the second reception signal, and detect a cross-correlation function between the two signals, the cross-correlation function representing a motion of a tissue of the object between the first and second rates;
• a second processor configured to compensate at least one of the first and second reception signals on the basis of the cross-correlation function;
• a third processor configured to convolute the first and second codes in the compensated first and second reception signals, respectively, add the two signals, and generate a third reception signal;
• and
• a unit configured to generate image data on the basis of the third reception signal.

An ultrasonic diagnostic apparatus comprising:

• a transmitting/receiving unit configured to transmit an ultrasound wave to an object to be examined in accordance with a first code at a first rate, receive a first reception signal, transmit an ultrasound wave to the object in accordance with a second code at a second rate, and receive a second reception signal from the object;
• a first processor configured to estimate a motion of a tissue in the object between the first and second rates on the basis of the first and second reception signals and the first and second codes;
• a second processor configured to compensate the first and second reception signals on the basis of the estimated motion;
• and
• a unit configured to generate image data on the basis of the compensated first and second reception signals.

An ultrasonic diagnostic apparatus comprising:

• a transmitting/receiving unit configured to transmit ultrasound waves modulated in accordance with codes at rates, receive reception signals;
• a first processor configured to estimate a motion of a tissue in the object between a pair of the rates on the basis of reception signals of ultrasound waves corresponding to same code;
• a second processor configured to compensate the reception signals on the basis of the estimated motion;
• and
• a unit configured to generate image data on the basis of the compensated reception signals.