Enhanced image resolution of dual-mode ultrasound array using coded excitation

Wan Yayun, Ajay Shrestha, Emad S Ebbini

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish (US)
Title of host publication2007 4th IEEE International Symposium on Biomedical Imaging
Subtitle of host publicationFrom Nano to Macro - Proceedings
Pages1128-1131
Number of pages4
DOIs
StatePublished - Nov 27 2007
Event2007 4th IEEE International Symposium on Biomedical Imaging: From Nano to Macro; ISBI'07 - Arlington, VA, United States
Duration: Apr 12 2007Apr 15 2007

Publication series

Name2007 4th IEEE International Symposium on Biomedical Imaging: From Nano to Macro - Proceedings

Other

Other2007 4th IEEE International Symposium on Biomedical Imaging: From Nano to Macro; ISBI'07
Country/TerritoryUnited States
CityArlington, VA
Period4/12/074/15/07

Keywords

  • Array signal processing
  • Biomedical image processing
  • Synthetic aperture imaging
  • Ultrasonics
  • Wiener filtering

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