Adaptable coded excitation for elasticity imaging

Research output: Contribution to journalConference articlepeer-review

Abstract

In our previous studies, we found that coded excitation significantly lowers decorrelation errors for strain estimation under several conditions, particularly those involving low echo signal-to-noise ratios (eSNR). To expand the utility of coded excitation to a broader range of experimental conditions, we examined two types of phase modulated (PM) codes - Optimal and M-sequence - and two types of receive processing - matched filter and inverse filter. Strain imaging quality is evaluated using a displacement SNR (SNR d), local modulation transfer function (LMTF) and contrast to noise ratio for strain (CNR strain). The performances of Optimal and M-sequence codes with matched and inverse filters were compared using simulations and phantom measurements. A combination of Optimal codes and inverse filter receivers was found to significantly lower strain image noise without reducing lesion contrast or spatial resolution.

Original languageEnglish (US)
Article numberU2-A-6
Pages (from-to)44-47
Number of pages4
JournalProceedings - IEEE Ultrasonics Symposium
Volume1
StatePublished - 2004
Externally publishedYes
Event2004 IEEE Ultrasonics Symposium - Montreal, Que., Canada
Duration: Aug 23 2004Aug 27 2004

Keywords

  • Coded excitation
  • M-sequence
  • Optimal code
  • Strain imaging

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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