Correlation of RF signals during angular compounding

Quan Chen, Anthony L. Gerig, Udomchai Techavipoo, James A. Zagzebski, Tomy Varghese

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


A theoretical analysis of the correlation between radio-frequency (RF) echo signal data acquired from the same location but at different angles is presented. The accuracy of the theoretical results is verified with computer simulations. Refinements to previous analyses of the correlation of RF signals originating from the same spatial location at different angular positions are made. We extend the analysis to study correlation of RF signals coming from different spatial locations and eventually correlation of RF signal segments that intersect at the same spatial location. The theory predicts a faster decorrelation with a change in the insonification angle for longer RF echo signal segments. As the RF signal segment becomes shorter, the decorrelation rate with angle is slower and approaches the limit corresponding to the correlation of RF signals originating from the same spatial location. Theoretical results provide a clear understanding of angular compounding techniques used to improve the signal-to-noise ratio in ultrasonic parametric imaging and in elastography.

Original languageEnglish
Pages (from-to)961-970
Number of pages10
JournalIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Issue number6
StatePublished - Jun 2005

Bibliographical note

Funding Information:
Manuscript received November 11, 2003; accepted October 22, 2004. This research was supported in part by NIH grants T32CA09206, R21EB002722, R21EB003853-01, and R21EB003853.

ASJC Scopus subject areas

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Correlation of RF signals during angular compounding'. Together they form a unique fingerprint.

Cite this