Accession Number : ADA131408

Title :   Ultrasound Tomography by Galerkin or Moment Methods,


Personal Author(s) : Johnson,Steven A ; Stenger,Frank

PDF Url : ADA131408

Report Date : 05 May 1983

Pagination or Media Count : 30

Abstract : Ultrasound B-scan imaging is now as well established and valuable clinical tool. Improvements in transducer arrays and microprocessor controls have lead to the development of real time linear and sector scanners which produce images of remarkable clarity and resolution compared with B-scanners of only a few years ago. Further improvements in B-scan images are predicted to occur as larger transducer apertures and improved dynamic focusing methods are employed. The use of Doppler ultrasound alone or in combination with real time B-scan imaging is expected to increase in importance as the clinical significance of high resolution Doppler images is appreciated. During the past decade X-ray C.T. (computed tomogrpahy) and recently NMR imaging have made remarkable contributions to the field of diagnostic imaging. X-ray (C.T.) and NMR images not only provide resolution of about 1 mm but also can be calibrated by absolute reference standards. The resulting quantitative images have proven to be valuable because of the greater ability thus provided to distinguish healthly and diseased tissue by their image values.

Descriptors :   *Tomography, *Ultrasonics, *Method of moments, Image processing, Inverse scattering, Perturbation theory, Approximation(Mathematics), Mathematical analysis

Subject Categories : Numerical Mathematics
      Biomedical Instrumentation and Bioengineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE