Title :
Optimum correlator arrangement for two-directional phase-aberration correction [in medical US imaging]
Author :
Miwa, Yuichi ; Umemura, Shin-ichiro ; Shinomura, Ryuichi ; O´Donnell, Matthew
Author_Institution :
Central Res. Lab., Hitachi Ltd., Tokyo, Japan
Abstract :
We have determined by computer simulation the optimum correlator arrangement when correcting two-directional phase-aberration with a two-dimensional (2D) array. In the simulation, a 2D phase screen was estimated from the correlation of neighboring signals in the 2D transducer. The difference between a given phase screen and the corresponding estimated phase screen was evaluated to find the optimum correlator arrangement. The optimum arrangement is to locate an equal number of correlators in both the scan and elevation directions with the distance between the neighboring correlators being 0.2 to 0.4 times the phase-screen correlation length
Keywords :
acoustic correlation; array signal processing; biomedical ultrasonics; error compensation; image reconstruction; image resolution; medical image processing; speckle; 2D phase screen; CNR; computer simulation; correlation of neighboring signals; elevation direction; equal number of correlators; medical US imaging; optimum correlator arrangement; phase-screen correlation length; scan direction; speckle region; two-dimensional array; two-directional phase-aberration correction; Biomedical imaging; Computational modeling; Computer simulation; Correlators; Fourier transforms; Laboratories; Phase estimation; Phased arrays; Speckle; Transducers;
Conference_Titel :
Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE
Conference_Location :
Sendai
Print_ISBN :
0-7803-4095-7
DOI :
10.1109/ULTSYM.1998.765252
