论文部分内容阅读
Background, Motivation and Objective One of the limitations of tissue characterization using backscatter coefficients (BSCs) is the relatively low spatial resolution of the technique. Although short gate lengths (Δz) can be used in order to improve the axial resolution, this approach may result in the distortion of the estimated BSC curves when using the discrete Fourier transform (DFT) for spectral estimation. Previous experimental reports suggest that autoregressive (AR) methods can improve the quality of average BSC (ABSC) estimation when using low Δz values. In this study, the estimation of effective scatterer diameters (ESDs) from a calibrated physical phantom using AR spectral analysis was experimentally assessed.