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 language | English (US) |
|---|---|
| Article number | U2-A-6 |
| Pages (from-to) | 44-47 |
| Number of pages | 4 |
| Journal | Proceedings - IEEE Ultrasonics Symposium |
| Volume | 1 |
| State | Published - 2004 |
| Externally published | Yes |
| Event | 2004 IEEE Ultrasonics Symposium - Montreal, Que., Canada Duration: Aug 23 2004 → Aug 27 2004 |
Keywords
- Coded excitation
- M-sequence
- Optimal code
- Strain imaging
ASJC Scopus subject areas
- Acoustics and Ultrasonics