Ultrasonic equipment for examinations using section images

摘要

Ultrasonic equipment for examinations using section images comprises a scanning mechanism, which includes a wheel that can be driven to rotate and carries a plurality of focussing sound transducer heads having working ranges which cover only respective fractional parts of the depth of the section surface. Each sound transducer head is activated as the sound beam emitted by the sound transducer head moves in the section surface. The echoes received by the sound transducer heads are used to generate a section image. In order to improve the image quality, sound transducer heads having working ranges in different depths of the section surface are activated in succession. Pre-entry paths are associated with sound transducer heads for examining regions near the surface of the object to be examined. Selecting means are provided which ensure that only echo signals derived from echoes which have originated in the working range of an activated sound transducer head are used to generate the image.