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Journal of Medical Ultrasonics
Erschienen in: Journal of Medical Ultrasonics 1/2019

15.11.2018 | Original Article

Estimation method for sound velocity distribution for high-resolution ultrasonic tomographic imaging

verfasst von: Keiichiro Abe, Mototaka Arakawa, Hiroshi Kanai

Erschienen in: Journal of Medical Ultrasonics | Ausgabe 1/2019

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Abstract

Purpose

With commercial ultrasonic equipment, the sound velocity is fixed to a constant value of 1530 or 1540 m/s, which is used for beam formation. However, the assumption of a constant sound velocity is not optimal, as the sound velocity in a living body is heterogeneous. In this study, a novel method was proposed to estimate the distribution of the sound velocity in a region of interest.

Methods

The sound velocity distribution was estimated by fitting the theoretical propagation time of the ultrasonic wave from the scatterer to each of the probe elements with measured values.

Results

In a phantom experiment, the sound velocity distribution was estimated by the proposed method with a maximum estimation error of 0.6%, and the resultant local sound velocity values successfully improved the quality of the ultrasonic image.

Conclusion

The proposed method has the potential to improve ultrasonic image quality in in vivo experiments by estimating the sound velocity distribution.
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Metadaten
Titel
Estimation method for sound velocity distribution for high-resolution ultrasonic tomographic imaging
verfasst von
Keiichiro Abe
Mototaka Arakawa
Hiroshi Kanai
Publikationsdatum
15.11.2018
Verlag
Springer Singapore
Erschienen in
Journal of Medical Ultrasonics / Ausgabe 1/2019
Print ISSN: 1346-4523
Elektronische ISSN: 1613-2254
DOI
https://doi.org/10.1007/s10396-018-0915-9

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