Improved parameter estimates based on the homodyned K distribution.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
David P Hruska, Michael L Oelze

Abstract

Quantitative techniques based on ultrasound backscatter are promising tools for ultrasonic tissue characterization. There is a need for fast and accurate processing strategies to obtain consistent estimates. An improved parameter estimation algorithm for the homodyned K distribution was developed based on SNR, skewness, and kurtosis of fractional- order moments. From the homodyned K distribution, estimates of the number of scatterers per resolution cell (micro parameter) and estimates of the ratio of coherent to incoherent backscatter signal energy (k parameter) were obtained. Furthermore, angular compounding was used to reduce estimate variance while maintaining spatial resolution of subsequent parameter images. Estimate bias and variance from Monte Carlo simulations were used to quantify the improvement using the new estimation algorithm compared with existing techniques. Improvements due to angular compounding were quantified by the decrease in estimate variance in both simulations and measurements from tissue-mimicking phantoms and by the increase in target contrast. Finally, the new algorithm was used to derive estimates from 2 kinds of mouse mammary tumors for tissue characterization. The new estimation algorithm yielded ...Continue Reading

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Citations

May 17, 2011·The Journal of the Acoustical Society of America·Ratan K Saha, Michael C Kolios
Nov 12, 2013·Ultrasound in Medicine & Biology·Nils MännickeKay Raum
Sep 17, 2013·Ultrasound in Medicine & Biology·Roberto J LavarelloMichael L Oelze
Oct 16, 2012·Ultrasound in Medicine & Biology·Goutam GhoshalMichael L Oelze
Oct 13, 2011·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Ratan K Saha, Michael C Kolios
Jan 14, 2016·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Michael Oelze, Jonathan Mamou
Oct 4, 2014·Osteoarthritis and Cartilage·N MännickeK Raum
Feb 15, 2011·Ultrasound in Medicine & Biology·Jonathan MamouErnest J Feleppa
May 18, 2016·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Ningning ZhaoJean-Yves Tourneret
Apr 6, 2016·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Ivan M Rosado-MendezTimothy J Hall
May 6, 2014·SIAM Journal on Imaging Sciences·François DestrempesGuy Cloutier
Oct 30, 2021·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Guillaume BosioGuy Cloutier

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