| 摘要 |
PURPOSE:To provide an ultrasonograph to inform the direction of a fetus, and the head and heart position of the fetus, by irradiating an ultrasonic wave on the stomach of a pregnant woman, obtaining the ultrasonic image of the fetus, and displaying the outline image of the fetus synthesized with the ultrasonic image. CONSTITUTION:The supply of a driving voltage with a constant frequency to a transmitter/receiver circuit 12 transmits an ultrasonic wave into the stomach of a pregnant woman repeatedly from a head-swinging vibrator 6. The ultrasonic wave reflects at a sharply changing point of the acoustic impedance in the stomach and the reflected wave is received at the vibrator 6. This received signal is sequentially stored in the storage space of a DSC 17, whose output signal is displayed on a TV monitor 18 through an adder 19. And from among various fetus body marks registered on a body mark table 15, a body mark selected by an operator according to the pregnant term and the direction of the fetus can be picked up by operating the input device 22, and is synthesized with the ultrasonic image at the adder 19 under the control by a CPU 20. The synthesized image is displayed on the monitor 18. |
