Grey Scale Processing For Tissue Differentiation With Annular Transducer

The emergence of grey scale echography over the previous storage tube methods of ultrasonic scanning leads to a reappraisal of equipment requirements, scanning techniques and criteria for classifying tissue. The use of grey scale to accurately display the magnitude of echoes requires the use of photographic film, scan convertor or computor storage to record the echogram. It's diagnostic ability is improved by fast automatic scanning, high resolution or annular array transducers, compression amplifiers and the use of simple as well as compound scanning. We have developed criteria for differentiating solid and cystic lesions, classifying normal tissue and pathological processes both localised and diffuse.