Résumé
We describe here the detailed signal processing technique that we have introduced to detect ultrasonic speckle modulation using a CCD array. We show that this new approach leads to a better signal to noise ratio than the single detector one not only because all the speckle grains signals are used but also because averaging over a few 104 grains smoothes this random signal. Finally a few examples of signal generated by locally absorbing volume immersed in real biological tissues are given.
| langue originale | Anglais |
|---|---|
| Pages (de - à) | 694-701 |
| Nombre de pages | 8 |
| journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 3597 |
| état | Publié - 1 déc. 1999 |
| Modification externe | Oui |
| Evénement | Proceedings of the 1999 Optical Tomography and Spectroscopy of Tissue III - San Jose, CA, USA Durée: 24 janv. 1999 → 28 janv. 1999 |
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