Title :
Potential of microbubbles for use as point targets in phase aberration correction
Author :
Psychoudakis, Dimitris ; Fowlkes, J. Brian ; Volakis, John L. ; Carson, Paul L.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
Abstract :
Bubbles can be produced by vaporization of perfluorocarbon droplets of a few /spl mu/m diameter. These bubbles can reach over 100 /spl mu/m in diameter and their backscatter is calculated to be well more than 10 dB above that of several organ tissues. At appropriate sizes, small acoustic amplitudes, and diagnostic frequencies (2-15 MHz), bubbles can be approximated by the nonrigid sphere-scattering solution employed here. This paper concerns the bubble size and its implications on the backscatter amplitude and the phase error introduced in diagnostic ultrasound when assuming that the bubble acts as a point target for phase aberration correction.
Keywords :
aberrations; acoustic wave scattering; backscatter; bubbles; drops; organic compounds; vaporisation; 100 micron; 2 to 15 MHz; acoustic amplitudes; backscatter amplitude; diagnostic frequencies; microbubbles; nonrigid sphere scattering solution; organ tissues; perfluorocarbon droplets; phase aberration correction; vaporization; Acoustic scattering; Backscatter; Blood; Equations; Frequency estimation; Laboratories; Psychology; Rayleigh scattering; Resonance; Ultrasonic imaging; Algorithms; Artifacts; Computer Simulation; Image Enhancement; Image Interpretation, Computer-Assisted; Microbubbles; Microspheres; Models, Biological; Models, Statistical; Particle Size; Reproducibility of Results; Scattering, Radiation; Sensitivity and Specificity; Ultrasonography;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2004.1386681
