Reconstruction of the distribution pattern for the bloodstream velocity vector in the acoustic tomography procedure

摘要

Results of the development of additive-correlation and multiplicative-correlation methods for a tomographic reconstruction of the distribution pattern of the total bloodstream velocity vector with the help of ultrasound are presented for relatively low frequencies (1-2) MHz, which provide a sufficient penetration depth. The reconstruction of the vector field uses a great body of spatial-correlation data and is closely related to the process of constructing the tomographic image of a given organ as a whole. A spatial cross-correlation of intermediate images is used, which makes it possible to estimate the bloodstream velocity vector independently of the value of the real blood transfer within the total measurement time. Results of numerical simulations for constant and varying distributions of the bloodstream velocity vector in the cross sections of blood vessels are presented.