Attenuation Correction and Normalisation for Quantification of Contrast Enhancement in Ultrasound Images of Carotid Arteries

Wing Keung Cheung, Dorothy M Gujral, Benoy N Shah, Navtej S Chahal, Sanjeev Bhattacharyya, David O Cosgrove, Robert J Eckersley, Kevin J Harrington, Roxy Senior, Christopher M Nutting, Meng-Xing Tang

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

An automated attenuation correction and normalisation algorithm was developed to improve the quantification of contrast enhancement in ultrasound images of carotid arteries. The algorithm first corrects attenuation artefact and normalises intensity within the contrast agent-filled lumen and then extends the correction and normalisation to regions beyond the lumen. The algorithm was first validated on phantoms consisting of contrast agent-filled vessels embedded in tissue-mimicking materials of known attenuation. It was subsequently applied to in vivo contrast-enhanced ultrasound (CEUS) images of human carotid arteries. Both in vitro and in vivo results indicated significant reduction in the shadowing artefact and improved homogeneity within the carotid lumens after the correction. The error in quantification of microbubble contrast enhancement caused by attenuation on phantoms was reduced from 55% to 5% on average. In conclusion, the proposed method exhibited great potential in reducing attenuation artefact and improving quantification in contrast-enhanced ultrasound of carotid arteries.

Original languageEnglish
Pages (from-to)1876-1883
Number of pages8
JournalUltrasound in Medicine and Biology
Volume41
Issue number7
Early online date3 Apr 2015
DOIs
Publication statusPublished - 1 Jul 2015

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