Ultrasonic methods of human body internal structures imaging are being
continuously enhanced. New algorithms are created to improve certain
output parameters. A synthetic aperture method (SA) is an example which
allows to display images at higher frame-rate than in case of
conventional beam-forming method.
Higher computational complexity is a limitation of SA method and it can
prevent from obtaining a desired reconstruction time. This problem can
be solved by neglecting a part of data. Obviously it implies a decrease
of imaging quality, however a proper data reduction technique would
minimize the image degradation.
A proposed way of data reduction can be used with synthetic transmit
aperture method (STA) and it bases on an assumption that a signal
obtained from any pair of transducers is the same, no matter which
transducer transmits and which receives. According to this postulate,
nearly a half of the data can be ignored without image quality decrease.
The presented results of simulations and measurements with use of wire
and tissue phantom prove that the proposed data reduction technique
reduces the amount of data to be processed by half, while maintaining
resolution and allowing only a small decrease of SNR and contrast of