Histopathologic Validation of Grayscale Carotid Plaque Characteristics Related to Plaque Vulnerability

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• 作者：Carol C. Mitchell^&lowast ; ; ^{ccm@medicine.wisc.edu} ; James H. Stein^&lowast ; ; Thomas D. Cook^&dagger ; ; Shahriar Salamat^&Dagger ; ; Xiao Wang^§ ; ; Tomy Varghese^§ ; ; Daren C. Jackson^¶ ; ; ¹ ; Carolina Sandoval Garcia^|| ; Stephanie M. Wilbrand^|| ; Robert J. Dempsey^||
• 关键词：Carotid plaque ; Vulnerable plaque ; Ultrasound gray-scale imaging
• 刊名：Ultrasound in Medicine & Biology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：129-137
• 全文大小：1189 K
• 卷排序：43

文摘

Inflammation and angiogenesis play major roles in carotid plaque vulnerability. The purpose of this study was to determine whether gray-scale features of carotid plaques are associated with histologic markers for inflammation. Thirty-eight individuals completed a dedicated research carotid ultrasound exam before carotid endarterectomy. Gray-scale analysis was performed on plaque images to measure plaque echogenicity (gray-scale median [GSM] pixel brightness), plaque area, presence of discrete white areas (DWAs) and the percent of black area near the lumen on any one component of the plaque. Plaques with higher ultrasound GSM had greater percent calcification (p = 0.013) on histopathology. Presence of an ultrasound DWA was associated with more plaque hemosiderin (p = 0.0005) and inflammation (p = 0.019) on histopathology examination. The percent of plaque black area in any one component was associated with a higher score for macroscopic ulceration (p = 0.028). Ultrasound plaque characteristics (GSM, DWAs and black areas) represent histopathologic markers associated with plaque vulnerability. ClinicalTrials.gov identifier: NCT02476396.