Reduction of effects of inactive array elements in phase aberration correction
Author
Karaman, Mustafa
Köymen, Hayrettin
Atalar, Abdullah
O'Donnell, M.
Date
1993Source Title
Proceedings of the 1993 IEEE Ultrasonics Symposium
Print ISSN
1051-0117
Publisher
IEEE
Pages
1155 - 1158
Language
English
Type
Conference PaperItem Usage Stats
145
views
views
94
downloads
downloads
Abstract
Phase aberration correction based on time delay estimation via minimization of sum of absolute difference (SAD) between radio frequency (RF) signals of neighboring elements is studied in the presence of missing elements. To examine the influence of inactive elements, phase estimation error is measured for various combinations of different number of missing elements, aberration level, and SNR. The measurements are performed on an experimental RF data set. Aberration delays of missing elements are interpolated using the phase estimate between the nearest active elements. The B-scan images are reconstructed for qualitative examination.
Keywords
AberrationsAdaptive systems
Computational methods
Error analysis
Error correction
Image quality
Image reconstruction
Interpolation
Mathematical models
Parameter estimation
Scanning
Signal to noise ratio
Inactive array elements
Phase aberration correction
Ultrasonic imaging