Evaluation of fibrotic probability image by multi-Rayleigh model for ultrasound image of liver using automatic region of interest selection

Shohei Mori, Shinnosuke Hirata, Hiroyuki Hachiya, Tadashi Yamaguchi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

To evaluate a liver fibrosis quantitatively using an ultrasound B-mode image, it is effective to focus on a probability density function (PDF) of echo amplitudes. In our previous study, a multi-Rayleigh model which is a combination model of Rayleigh distributions with different variances was proposed to express the PDF of echo amplitudes from a fibrotic liver. Using the multi-Rayleigh model, the ultrasound B-mode image can be converted to the fibrotic probability image. To evaluate liver fibrosis quantitatively using the multi-Rayleigh model, a selection of a region of interest (ROI) is important because data such as an abdominal wall and a blood vessel wall are erroneously judged as the fibrotic tissue in the multi-Rayleigh model. In this paper, an automatic selection method of the ROI was examined and ultrasound B-mode images of the fibrotic liver were evaluated using the fibrotic probability images. The ROI could be selected automatically based on deviations of the PDF of echo amplitudes from the Rayleigh distribution and the multi-Rayleigh model. In the evaluation of fibrotic probability images, the averaged fibrotic probability became large as the progress of liver fibrosis. It was concluded that the progress of liver fibrosis could be evaluated quantitatively using fibrotic probability image based on the multi-Rayleigh model.

Original languageEnglish
Title of host publication2015 IEEE International Ultrasonics Symposium, IUS 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479981823
DOIs
Publication statusPublished - 2015 Nov 13
Externally publishedYes
EventIEEE International Ultrasonics Symposium, IUS 2015 - Taipei, Taiwan, Province of China
Duration: 2015 Oct 212015 Oct 24

Publication series

Name2015 IEEE International Ultrasonics Symposium, IUS 2015

Other

OtherIEEE International Ultrasonics Symposium, IUS 2015
CountryTaiwan, Province of China
CityTaipei
Period15/10/2115/10/24

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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