Computer Recognition of Biological Objects’ Internal Structure Using Ultrasonic Projection

Abstract

In this paper, the possibilities of using ultrasonic projection for computer recognition of biological structures were analyzed. The computer simulation of the distribution of ultrasonic wave propagation velocity local values inside two three-dimensional objects dipped in the water was done, and next for a few projection planes the Radon transforms were calculated in the form of the mean value distribution in parallel geometry. The results of simulation were visualized in the form of the grey scale images and in the form of the pseudo-3D charts with lighting. The real measurements of three-dimensional biological objects were carried out on the elaborated research setup. The obtained projection images of the distribution of three different acoustic parameters in the object structure: propagation velocity, amplitude and mid frequency shift of ultrasonic wave were compared with the optical scan in the same plane of object cross-section. The conclusion is that computer-assisted ultrasonic projection enables the correct recognition of biological structures. On the basis of a few projection images of the examined structure obtained from many directions it is possible to attempt to computer-reconstruct in 3D heterogeneity boundaries inside the structure, which can be used e.g. in diagnosing the early stages of women’s breast cancer.