Effect of the radiation pattern on the quality of object image reconstruction in circular aperture synthesis

Abstract

This paper addresses the problem of the acoustic wave reception sector of a tomograph detector in an aqueous medium, whose solution anticipates the development of a tomograph with circular aperture synthesis in monochromatic probing. In the theoretical consideration of the problem of object image reconstruction, the transducer radiation pattern was assumed to be isotropic in the plane, i. e. disk-shaped, with an unlimited circular reception sector, which allows investigation of the internal structure of the object in the plane of the radiation pattern disk. The effect of the deviation from isotropy due to the limitation of the acoustic wave reception sector on the results of image reconstruction of a point object is determined by modeling the reconstruction of a point object image from trajectory Doppler signals received by the detector moving on a circular path around the point object.