Title :
Phase aberration measurement and correction in medical ultrasound
Author :
Trahey, Gregg E.
Author_Institution :
Dept. of Biomed. Eng., Duke Univ., Durham, NC, USA
Abstract :
An apparatus to measure time-of-flight profiles in living tissues and an experimental phased-array imaging system capable of correcting unknown phase errors induced by inhomogeneities in the acoustic velocities in tissue are presented. The procedure utilizes regional target brightness to adjust the phasing of individual elements iteratively. The results of in vivo measurements of phase-error profiles in abdominal, breast and transcranial imaging applications are given. The success of the phase-correction system in restoring the quality of images degraded by these errors is demonstrated
Keywords :
biomedical equipment; biomedical measurement; biomedical ultrasonics; ultrasonic equipment; ultrasonic measurement; abdominal imaging; acoustic velocities inhomogeneities; breast imaging; image quality restoration; living tissues; measurement apparatus; medical apparatus; medical ultrasound; phase aberration correction; phase aberration measurement; phased-array imaging system; regional target brightness; time-of-flight profiles; transcranial imaging; Acoustic imaging; Acoustic measurements; Biomedical acoustics; Biomedical imaging; Brightness; Error correction; Phase measurement; Ultrasonic imaging; Ultrasonic variables measurement; Velocity measurement;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.95788
