Compensation of fat layer effects in ultrasound imaging using an inclined-fat-layer model derived from magnetic resonance images

When cutaneous fat layers are in the ultrasound imaging region, the phase aberration caused by the fat layers induce image distortion as well as spatial resolution degradation. The phase aberration may complicate clinical procedures particularly when ultrasound imaging is employed for spatial positi...

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Bibliographic Details
Published inAcoustical physics Vol. 57; no. 2; pp. 144 - 150
Main Authors Aowlad Hossain, A. B. M., Kang, L. H., Kim, J. S., Cho, M. H., Lee, S. Y.
Format Journal Article
LanguageEnglish
Published Dordrecht SP MAIK Nauka/Interperiodica 01.03.2011
Subjects
Aberration
Acoustics
Beamforming
Distortion
Imaging
Magnetic resonance
Needles
Physical Acoustics
Physics
Physics and Astronomy
Ultrasound
Sound Speed
Inclination Angle
Ultrasound Image
Ultra Sound
Acoustical Physic
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Summary:When cutaneous fat layers are in the ultrasound imaging region, the phase aberration caused by the fat layers induce image distortion as well as spatial resolution degradation. The phase aberration may complicate clinical procedures particularly when ultrasound imaging is employed for spatial positioning of medical devices like a biopsy needle or HIFU. To compensate the fat layer effects more precisely in beamforming, an inclined-fat-layer model has been established from the magnetic resonance images of the same imaging region as in the ultrasound scanning. We have verified utility of the fat layer model by taking images of a metal needle put into an inclined-fat-layer mimicking phantom. The ultrasound images taken with a 128-element linear phase array operating at 6 MHz have shown better resolution and less distortion when receive beamforming was performed with the phase delay data derived from the inclined-fat-layer model.
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ISSN:1063-7710
1562-6865
DOI:10.1134/S1063771011020205