| 摘要 |
An ultrasonic examination device comprising two curved converging mirrors, the points of focus of which differ and are separated from each other over a distance equalling the width of the image plane. The device furthermore comprises two pairs of mosaics, formed by transducers, which are mounted back-to-back and which rotate about axes which pass through the points of focus of the said mirrors and which are perpendicular to the image plane. |
