Conventional ultrasound systems with fixed transmit and dynamic receive focusing suffer from limited depth of field and poor SNR uniformity. Based on fixed receive focusing, this paper proposes an SNR-dependent 2-D retrospective filtering technique to extend the depth of field, in which both the sidelobe energy and the filter energy are minimized simultaneously. According to the estimated SNR of the unfiltered image, the proposed 2-D filter can provide the optimal compromise between image quality and SNR while maintaining a moderate filter size. Simulations were performed to demonstrate the efficacy of the proposed technique. It has been shown that the proposed 2-D filter technique outperforms conventional 1-D lateral filter and classical 2-D Wiener filter in terms of both SNR and contrast resolution.
|Number of pages||4|
|Journal||Proceedings of the IEEE Ultrasonics Symposium|
|State||Published - 2003|
|Event||2003 IEEE Ultrasonics Symposium - Proceedings - Honolulu, HI, United States|
Duration: 5 Oct 2003 → 8 Oct 2003