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Optimization of ultrasound scanner characteristics: a preliminary study^*

Department of Medical Physics, Leeds General Infirmary, Leeds LS1 3EX, UK

It is generally accepted that different transducer characteristics are optimal for different examinations, but it is not always obvious which other scanner/transducer parameters, e.g. signal processing should be selected for a given examination. We have examined noise and grey-level parameters for two specific anatomical sections (one showing the liver and right kidney and one showing the uterus) using a combination of subjective and objective assessment. The results confirm that the images chosen for this study have different requirements in terms of noise and grey-scale processing. The uterus image requires a large range of greys assigned to the lower level echoes and requires low noise levels. The liver/kidney image was not affected by noise levels in the systems used and required the lower amplitude grey-levels to be compressed, liberating a greater range of greys for the higher amplitude echoes.

^* Presented at the BMUS 24th Annual Meeting in Blackpool, on 9–11 December 1992.

Received for publication December 11, 1992. Revision received March 3, 1993. Accepted for publication March 17, 1993.