| 摘要 |
<p>In an ultrasonic imaging apparatus for obtaining a tomogram image of an object to be diagnosed on a monitor, the apparatus includes electroacoustic transducers, a phasing unit, a phase detection unit, and an adding unit: electroacoustic transducers are provided in a line along with a surface of the object, emitting ultrasonic waves to the object, detecting the ultrasonic waves reflected therefrom, and converting them to electric signals as detection signals; a phasing unit is connected to the electroacoustic transducers for receiving the detection signals, delaying them in accordance with distance between the electroacoustic transducers and the object, and phasing them to match the phase of detection signals; a phase detection unit is connected to the electroacoustic transducers and the phasing unit for detecting the error of phase contained in the detection signals output from the electroacoustic transducers or the phasing unit and correcting the amount of delay previously set in the phase unit in accordance with the error of phase, the phase detection unit further comprising first and second binary units for binalizing the detection signals to detect the error of phase contained in the detection signals; and an adding unit is connected to the phasing unit to accumulate the detection signals phased by the phasing unit. <IMAGE></p> |
