| 摘要 |
<p>An ultrasonic diagnosing apparatus that transmits an ultrasonic beam into a the body of a subject by means of a multi-ring formed of vibrator elements arrayed tow-dimensionally and coupled into concentric rings and receives the echo so as to create a tomogram or three-dimensional image of the subject, comprising a probe adapted to correct the focusing error due to the difference of ultrasonic wave propagating paths and including two-dimensionally arrayed vibrator elements for transmitting/receiving ultrasonic waves to/from the subject, means for grouping the vibrator elements so as to form a multi-ring, means for giving a delay to each ring of the multi-ring, transmitting/receiving an ultrasonic beams, and scanning the ultrasonic beam so as to create an ultrasonic image, means for measuring the delay error at a portion of the subject where the sound speed is uneven and changing at least either the coupling of the multi-ring or the delay time according to the measurement error so as to transmit/receive the ultrasonic beam, and means for imaging the inside of the subject by means of the corrected ultrasonic beam.</p> |
