Abstract for Ijaz_tr661

Cambridge University Engineering Department Technical Report CUED/F-INFENG/TR 661

MULTI-DIRECTIONAL SCATTERING MODELS FOR 3D ULTRASOUND

U. Z. Ijaz, R. J. Housden, G. M. Treece, R. W. Prager, and A. H. Gee.

Jan 2011

An ultrasound image is created from back-scattered echoes originating both from diffuse and directional scattering. It is potentially useful to separate these two components for the purpose of tissue characterization. This paper presents several models for visualization of scattering fields in 3D ultrasound. By scanning the same anatomy from multiple directions, we can observe the variation of specular intensity as a function of viewing angle. This paper considers two models for estimating the di®use and specular components of the backscattered intensity: a modification of the well-known Phong re°ection model and an existing exponential model. We examine 2D implementations and also propose novel 3D extensions of these models in which the probe is not constrained to rotate within a plane. Both simulation and experimental results show that improved performance can be achieved with 3D models.


(ftp:) Ijaz_tr661.pdf (http:) Ijaz_tr661.pdf

If you have difficulty viewing files that end '.gz', which are gzip compressed, then you may be able to find tools to uncompress them at the gzip web site.

If you have difficulty viewing files that are in PostScript, (ending '.ps' or '.ps.gz'), then you may be able to find tools to view them at the gsview web site.

We have attempted to provide automatically generated PDF copies of documents for which only PostScript versions have previously been available. These are clearly marked in the database - due to the nature of the automatic conversion process, they are likely to be badly aliased when viewed at default resolution on screen by acroread.