Medical Ultrasonic Imaging Systems

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Authors
  1. Reid, J.M.
Corporate Authors
Defence R&D Canada - Toronto, Toronto ONT (CAN);Washington Univ, Seattle WA (US)
Abstract
Initial contacts confirmed that the DRDC Toronto investigation on 3D adaptive ultrasound beamforming is an important project. It seeks to provide new methods for correcting common artifacts in medical ultrasound images that are caused by variations in the speed of sound in different tissues. The variations can distort images sufficiently to sometimes cause a false finding of twins in o.b. scans. They also confuse the diagnosis of solid versus cystic tumors in other organs, which can falsely indicate a finding of cancer. The methods proposed in this work use modern signal processing methods to correct the echo signals by using properties of the signals themselves. They have been proven in other applications of pulse-echo imaging such as sonar and radar. The application to the medical ultrasound signals is not trivial because of the much wider fractional bandwidths and higher data rates encountered in this new application. My role thus, was not only to advise on the medical ultrasound requirements of the system, but also to keep the group informed about current and future applications of ultrasound in medicine. The first task was the evaluation of the proposed design. It was deemed suitable for a "proof of concept" project in that the resolution and other parameters would be capable of producing images that could demonstrate the advantages of the new methods. TRUNCATED
Keywords
Medical Tomography Imaging;Ultrasonic frequencies;Transducer arrays;Abberation effects;A-scan;B-scan;Ultrasound systems
Report Number
DRDC-TORONTO-CR-2002-059 — Contractor Report (Final)
Date of publication
01 May 2002
Number of Pages
33
DSTKIM No
CA021105
CANDIS No
517838
Format(s):
Hardcopy;Document Image stored on Optical Disk

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