Reduction of effects of inactive array elements in phase aberration correction
Date
1993
Editor(s)
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
Proceedings of the 1993 IEEE Ultrasonics Symposium
Print ISSN
1051-0117
Electronic ISSN
Publisher
IEEE
Volume
Issue
Pages
1155 - 1158
Language
English
Type
Journal Title
Journal ISSN
Volume Title
Series
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.
Course
Other identifiers
Book Title
Keywords
Aberrations , Adaptive 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