P3D-2 Phase Aberration Correction for 3D Ultrasound Computer Tomography Images

Our experimental setup for ultrasound computer tomography (USCT) has a cylindrical aperture with a diameter of 18 cm and height of 15 cm. In this setup ultrasound can travel over long distances up to 50 cm. Phase aberration due to speed of sound variations cause many pulses not to overlap in the ref...

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Bibliographic Details
Published in2007 IEEE Ultrasonics Symposium Proceedings pp. 1808 - 1811
Main Authors Ruiter, N.V., Schnell, R., Zapf, M., Gemmeke, H.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2007
Subjects
Acoustic reflection
Apertures
Geometry
Image quality
Image reconstruction
Image resolution
Optical reflection
Tomography
Ultrasonic imaging
Ultrasonic transducers
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Summary:Our experimental setup for ultrasound computer tomography (USCT) has a cylindrical aperture with a diameter of 18 cm and height of 15 cm. In this setup ultrasound can travel over long distances up to 50 cm. Phase aberration due to speed of sound variations cause many pulses not to overlap in the reflectivity reconstruction. 3D speed of sound (SOS) maps were calculated using the recorded data and applied for correction. Due to a sparse sampling of the received transmission signals, the resulting speed of sound maps are noisy and of low detail. But the accuracy of the average speed of sound is sufficient for phase aberration correction of the reflection images down to object size of approx. 1 mm and increases the image quality significantly. Our work shows that high resolution USCT is not possible without phase aberration correction using SOS information.
ISBN:1424413834
9781424413836
ISSN:1051-0117
DOI:10.1109/ULTSYM.2007.455