Scatterer size estimation using the center frequency assessed from ultrasound time domain data

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

Scatterer size estimation is useful when characterizing tissue using ultrasound. In all previous studies on scatterer size, the estimations are performed in the frequency domain and are thus subjected to a trade off in time-frequency resolution. This study focused on the feasibility of estimating scatterer size in the time domain using only the ultrasound center frequency, assuming a Gaussian-shaped pulse. A model for frequency normalization was derived and the frequency-dependent attenuation was compensated. Five phantoms with well-defined sizes of spherical glass beads were made and scanned with two different linear array transducers with variable center frequencies. A strong correlation (r = 0.99, p < 10-19) between the backscattered center frequency and the product between the wave number and scatterer radius was demonstrated. On average the scatterer diameter was underestimated by 6% ± 24%. These results suggest that estimation of scatterer size is possible using only the center frequency assessed in the time domain.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Skåne University Hospital
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Medicinsk bildbehandling
Originalspråkengelska
Sidor (från-till)2352-2357
Antal sidor6
TidskriftJournal of the Acoustical Society of America
Volym140
Utgivningsnummer4
StatusPublished - 2016 okt 1
PublikationskategoriForskning
Peer review utfördJa