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Biomedical subjects

A J Hall

Publications and source records attributed to A J Hall.

At least 217 records · Page 12Linked to original sources
PubMed1975

A simple approach to grey scale echography.

The use of grey scale echography may be advantageous in some diagnostic situations, e.g. liver investigations. The effects on the recorded grey scale of different types of signal processing in conjunction with various settings of the brilliance control were investigated using a standard ultrasonic machine. The most satisfactory results were obtained when operating at a high baseline brilliance and modulating the display with signals proportional to the echo amplitude. A series of comparative pictures are shown to demonstrate these effects.

Humans↗
PubMed1971

Chromosome breakage and ultrasound.

Human lymphocyte cultures were examined for chromosome damage after exposure to ultrasound. Control and treated slides were scored "blind" and showed no evidence of damage due to ultrasound. Neither was there evidence of chromosome damage in blood cultures from six infants whose mothers had ultrasound during pregnancy when compared with that from six infants whose mothers had not. Our results suggest that if diagnostic ultrasound causes chromosome damage it does so with less frequency than acceptable levels of diagnostic x-irradiation.

Adult↗