TY - GEN
T1 - Enhanced image resolution of dual-mode ultrasound array using coded excitation
AU - Yayun, Wan
AU - Shrestha, Ajay
AU - Ebbini, Emad S.
PY - 2007
Y1 - 2007
N2 - We have previously shown that a prototype 64-element 1 MHz concave DMUA has lateral and axial resolution 1.1 mm and 2.6 mm. While the lateral resolution is acceptable and compares favorably with abdominal diagnostic probes, the axial resolution is very poor. It must be improved by a factor of 2 or more to provide more uniform resolution. We have investigated the use of coded excitation and pseudoinverse filtering for enhancing the axial resolution of DMUA. Image data were collected from a 3D quality assurance phantom with an egg-shaped contrast target. The contrast ratio was 3.35, 7.8, and 6.6 and the axial resolution was 2.6, 2.5, and 1.65 mm for conventional pulse-echo, matched filter compression and inverse filter compression, respectively. Thus one can see that approximately 33% improvement in resolution was achievable without significant loss in contrast ratio.
AB - We have previously shown that a prototype 64-element 1 MHz concave DMUA has lateral and axial resolution 1.1 mm and 2.6 mm. While the lateral resolution is acceptable and compares favorably with abdominal diagnostic probes, the axial resolution is very poor. It must be improved by a factor of 2 or more to provide more uniform resolution. We have investigated the use of coded excitation and pseudoinverse filtering for enhancing the axial resolution of DMUA. Image data were collected from a 3D quality assurance phantom with an egg-shaped contrast target. The contrast ratio was 3.35, 7.8, and 6.6 and the axial resolution was 2.6, 2.5, and 1.65 mm for conventional pulse-echo, matched filter compression and inverse filter compression, respectively. Thus one can see that approximately 33% improvement in resolution was achievable without significant loss in contrast ratio.
KW - Array signal processing
KW - Biomedical image processing
KW - Synthetic aperture imaging
KW - Ultrasonics
KW - Wiener filtering
UR - http://www.scopus.com/inward/record.url?scp=36349024287&partnerID=8YFLogxK
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U2 - 10.1109/ISBI.2007.357055
DO - 10.1109/ISBI.2007.357055
M3 - Conference contribution
AN - SCOPUS:36349024287
SN - 1424406722
SN - 9781424406722
T3 - 2007 4th IEEE International Symposium on Biomedical Imaging: From Nano to Macro - Proceedings
SP - 1128
EP - 1131
BT - 2007 4th IEEE International Symposium on Biomedical Imaging
T2 - 2007 4th IEEE International Symposium on Biomedical Imaging: From Nano to Macro; ISBI'07
Y2 - 12 April 2007 through 15 April 2007
ER -