Quantitative estimation of liver fibrosis considering effect of resolution of ultrasound in B-mode image

Shohei Mori, Shinnosuke Hirata, Hiroyuki Hachiya

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


We have been developing an evaluation method of liver fibrosis using ultrasound images to realize quantitative diagnosis of hepatitis. To evaluate liver fibrosis quantitatively, we have focused on a probability density function of the echo amplitude. Then, a multi-Rayleigh distribution model expressed by combination of Rayleigh distributions with different variances has been proposed. This multi-Rayleigh distribution model enabled us to extract fibrosis parameters from a B-mode image. However, the B-mode image is affected by a resolution of the ultrasound; therefore, the fibrosis parameters estimated from the B-mode images deviate from their true values. In this paper, we examined the effect of the resolution of the ultrasound by computer simulation. As a result, we could see that the estimated fibrosis stage becomes smaller and the estimated amount of the fibrotic tissue becomes a little larger than their true values. Then, we tried to compensate the effect of the resolution. We showed the possibility that we could correct the estimated fibrosis parameters to their true values by considering the relationship between the estimated fibrosis parameters and the resolution size of the ultrasound.

Original languageEnglish
Title of host publicationForum Acusticum, FA 2014
EditorsBartlomiej Borkowski
PublisherEuropean Acoustics Association, EAA
ISBN (Electronic)9788361402282
Publication statusPublished - 2014
Event7th Forum Acusticum, FA 2014 - Krakow, Poland
Duration: 2014 Sept 72014 Sept 12

Publication series

NameProceedings of Forum Acusticum
ISSN (Print)2221-3767


Conference7th Forum Acusticum, FA 2014


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