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Methods for reverberation suppression utilizing dual frequency band imaging

Methods for reverberation suppression utilizing dual frequency band imaging

Kategori
Vitenskapelig artikkel
Sammendrag
Reverberations impair the contrast resolution of diagnostic ultrasound images. Tissue harmonic imaging is a common method to reduce these artifacts, but does not remove all reverberations. Dual frequency band imaging (DBI), utilizing a low frequency pulse which manipulates propagation of the high frequency imaging pulse, has been proposed earlier for reverberation suppression. This article adds two different methods for reverberation suppression with DBI: the delay corrected subtraction (DCS) and the first order content weighting (FOCW) method. Both methods utilize the propagation delay of the imaging pulse of two transmissions with alternating manipulation pressure to extract information about its depth of first scattering. FOCW further utilizes this information to estimate the content of first order scattering in the received signal. Initial evaluation is presented where both methods are applied to simulated and in vivo data. Both methods yield visual and measurable substantial improvement in image contrast. Comparing DCS with FOCW, DCS produces sharper images and retains more details while FOCW achieves best suppression levels and, thus, highest image contrast. The measured improvement in contrast ranges from 8 to 27 dB for DCS and from 4 dB up to the dynamic range for FOCW.
Språk
Engelsk
Forfatter(e)
  • Jochen Rau
  • Svein-Erik Måsøy
  • Rune Hansen
  • Bjørn Atle J. Angelsen
  • Thor Andreas Tangen
Institusjon(er)
  • Norges teknisk-naturvitenskapelige universitet
  • SINTEF Digital / Helse
År
Publisert i
Journal of the Acoustical Society of America
ISSN
0001-4966
Forlag
Acoustical Society of America (ASA)
Årgang
134
Hefte nr.
3
Side(r)
2313 - 2325