Method and equipment for plotting section images of objects subjected to ultrasonic examination

摘要

In a method of plotting section images of objects subjected to ultrasonic examination, a section surface of the object is scanned with a sound beam and echoes generated in response to the pulses of the sound beam are converted into echo signals which are plotted on a plotting surface, such as a fluorescent screen or a record carrier, to form a section image. The sound beams scans the section surface at a varying velocity. The pulse repetition period of the sound pulses is varied so that the section surface is scanned with a uniform transverse resolution. In equipment for carrying out the method, the pulse repetition frequency of the sound pulses is controlled by a trigger which generates trigger pulses at times which are functionally related to the scanning movement of the sound beam. The trigger may comprise programmed memory.