Abstract: It becomes possible to obtain high sound pressure in a high frequency domain by a capacitive ultrasonic transducer which comprises a membrane on which one electrode is formed, a cavity constructed in its backface, and a substrate on which these are mounted and supported and on whose surface an electrode is provided, on a surface in an ultrasonic transmission and reception side, characterized in that the membrane comprises two or more layers, and at least one layer of them comprises a high dielectric constant film.

Abstract: In order to display a part being observed in ultrasonic scanning within a body cavity clearly and a desired section easily, ultrasonic wave is scanned and is obtained in the body cavity. Then, an ultrasonic image creating unit creates an ultrasonic image therefrom. A schematic diagram data creating unit extracts schematic diagram data read from a schematic diagram data storing unit based on the attitude/position signal indicating the attitude of an object and the position for scanning ultrasonic wave in the body cavity, which are obtained from a position/orientation detecting unit. An image synthesizing unit synthesizes the ultrasonic image created by the ultrasonic image creating unit and the schematic diagram data created by the schematic diagram data creating unit. Then, a display displays the ultrasonic image and the schematic diagram corresponding to the position for scanning ultrasonic wave on the same screen.

Abstract: A PC board of a PC has a controller for controlling a motor drive circuit based on a timing signal, a memory for GAIN/STC for storing amplification data in an data in an amplifier for GAIN/STC as digital data and outputting the stored data synchronously with the timing signal of the controller, and a PC internal bus controller for connecting a PC internal bus to a local bus. Set values of GAIN and STC are converted into parameters and are set to the memory for GAIN/STC and a set value of contrast is converted into a parameter and is set to the controller both in a live state and in a freeze state.

Abstract: A PC board of a PC has a controller for controlling a motor drive circuit based on a timing signal, a memory for GAIN/STC for storing amplification data in an amplifier for GAIN/STC as digital data and outputting the stored data synchronously with the timing signal of the controller, and a PC internal bus controller for connecting a PC internal bus to a local bus. Set values of GAIN and STC are converted into parameters and are set to the memory for GAIN/STC and a set value of contrast is converted into a parameter and is set to the controller both in a live state and in a freeze state.

Abstract: An ultrasonic diagnostic apparatus of a mechanical scanning system has: a receiving/transmitting unit for receiving and transmitting an ultrasonic wave from/to an ultrasonic vibrator; and a PC. The PC has: a PC board mounted detachably, which controls a motor driving circuit via the receiving/transmitting unit, rotates the ultrasonic vibrator that is mounted to the rotary shaft of a motor to become the center of the rotation by rotating the motor in response to a motor drive signal, controls the receiving/transmitting unit, and performs a predetermined digital signal process for an ultrasonic echo signal from the receiving/transmitting unit; a PC internal memory for storing a digital signal from the PC board; a general CPU; and the like.

Abstract: Each of a plurality of transducers comprising a transducer array of an ultrasonic probe are sequentially driven, and the echo signals obtained from each of the transducers are stored in memory as complex data, following A/D conversion, quadrature detection, and the like. These complex data are read following a wave-front locus which converges on the focal point set as an observation point, and further the vector directions of each of the complex data are subjected to phase correction and synthesized, thus obtaining an ultrasonic image with high resolution.