Sound speed estimation using automatic ultrasound image registration

A mismatch between the sound speed assumed for beamforming and scan conversion and the true sound speed in the tissue to be imaged can lead to significant defocusing and some geometric distortions in ultrasound images. A method is presented for estimating the average sound speed based on detection o...

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Veröffentlicht in:	IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2004-09, Vol.51 (9), p.1095-1106
Hauptverfasser:	Krucker, J.F., Fowlkes, J.B., Carson, P.L.
Format:	Artikel
Sprache:	eng
Schlagworte:	Acoustic distortion Acoustic measurements Acoustics Algorithms Array signal processing Biological and medical sciences Computer Simulation Deviation Distortion Distortion measurement Droplets Estimating Exact sciences and technology Fundamental areas of phenomenology (including applications) General equipment and techniques Image converters Image Enhancement - methods Image Interpretation, Computer-Assisted - methods Image registration Imaging phantoms Instruments, apparatus, components and techniques common to several branches of physics and astronomy Investigative techniques, diagnostic techniques (general aspects) Medical sciences Miscellaneous. Technology Motion Phantoms, Imaging Physics Pulse measurements Reproducibility of Results Scattering, Radiation Sensitivity and Specificity Sound Subtraction Technique Transducers Ultrasonic imaging Ultrasonic investigative techniques Ultrasonics, quantum acoustics, and physical effects of sound Ultrasonography - instrumentation Ultrasonography - methods Ultrasound Velocity measurement
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Zusammenfassung:	A mismatch between the sound speed assumed for beamforming and scan conversion and the true sound speed in the tissue to be imaged can lead to significant defocusing and some geometric distortions in ultrasound images. A method is presented for estimating the average sound speed based on detection of these distortions using automatic registration of overlapping, electronically steered images. An acrylamide gel phantom containing vaporized dodecafluoropentane droplets as point targets was constructed to evaluate the technique. Good agreement (rms deviation
ISSN:	0885-3010 1525-8955
DOI:	10.1109/TUFFC.2004.1334842