Correction of tissue-motion effects on common-midpoint signals using reciprocal signals
| Autor: | Yue Li, Brent S. Robinson |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Physics
Time Factors Acoustics and Ultrasonics Phantoms Imaging Acoustics Transducers Motion (geometry) Near and far field Signal Processing Computer-Assisted Equipment Design Midpoint Signal Motion Sound Arts and Humanities (miscellaneous) Position (vector) Redundancy (engineering) Ultrasonics Artifacts Reciprocal Algorithms Cellular biophysics Ultrasonography |
| Zdroj: | The Journal of the Acoustical Society of America. 132(2) |
| ISSN: | 1520-8524 |
| Popis: | The near field signal redundancy algorithm for phase-aberration correction is sensitive to tissue motion because several separated transmissions are usually needed to acquire a set of common-midpoint signals. If tissues are moving significantly due to, for example, heart beats, the effects of tissue motion on common-midpoint signals need to be corrected before the phase-aberration profile can be successfully measured. Theoretical analyses in this paper show that the arrival-time difference between a pair of common-midpoint signals due to tissue motion is usually very similar to that between the pair of reciprocal signals acquired using the same two transmissions. Based on this conclusion, an algorithm for correcting tissue-motion effects on the peak position of cross-correlation functions between common-midpoint signals is proposed and initial experimental results are also presented. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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