TY - JOUR
T1 - Fundamental resolution limits of a coded-excitation system for real-time pulse-echo imaging
AU - Ebbini, Emad S.
AU - Shen, Jian
PY - 1997/12/1
Y1 - 1997/12/1
N2 - A general analytical formula for image formation in phased array system employing conventional beamforming, matched filtering, or pseudoinverse filtering with coded excitation is presented. Range and lateral resolution limits for the matched filtering approach are derived and compared with the well known diffraction limits encountered in conventional beamforming and super-resolution limits achievable with the pseudoinverse filters in the noise-free case. Experimental data is obtained to support the validity of the analytical results. It is shown that, even in the presence of noise, the regularized PI operator produces lateral resolution that exceeds the diffraction limit. This is achieved at practical SNR values for the imaging system and does not result in sacrificing contrast resolution.
AB - A general analytical formula for image formation in phased array system employing conventional beamforming, matched filtering, or pseudoinverse filtering with coded excitation is presented. Range and lateral resolution limits for the matched filtering approach are derived and compared with the well known diffraction limits encountered in conventional beamforming and super-resolution limits achievable with the pseudoinverse filters in the noise-free case. Experimental data is obtained to support the validity of the analytical results. It is shown that, even in the presence of noise, the regularized PI operator produces lateral resolution that exceeds the diffraction limit. This is achieved at practical SNR values for the imaging system and does not result in sacrificing contrast resolution.
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M3 - Conference article
AN - SCOPUS:0031347936
VL - 2
SP - 1539
EP - 1542
JO - Proceedings of the IEEE Ultrasonics Symposium
JF - Proceedings of the IEEE Ultrasonics Symposium
SN - 1051-0117
T2 - Proceedings of the 1997 IEEE Ultrasonics Symposium. Part 1 (of 2)
Y2 - 5 October 1997 through 8 October 1997
ER -