使用多排CT血管造影术研究钙化颈动脉斑块的窗设置。
Window settings for the study of calcified carotid plaques with multidetector CT angiography.
作者信息
Saba L, Mallarin G
机构信息
Department of Science of the Images, Policlinico Universitario, Cagliari, Italy.
出版信息
AJNR Am J Neuroradiol. 2009 Aug;30(7):1445-50. doi: 10.3174/ajnr.A1509. Epub 2009 Mar 19.
Abstract
CT angiography (CTA) shows high sensitivity in detecting calcified plaques, but sometimes a bias in the exact quantification of stenosis degree occurs, mainly caused by the high linear attenuation coefficient of the calcified plaques. The purpose of this technical study was to evaluate the most appropriate CT window parameters for the assessment of calcified plaques stating which of them can provide the best inter-observer agreement. Scatter-plots and regression results showed the correlation between both width and level respectively depending on intraluminal Hounsfield units (HU) value (width = intraluminal HU x 2.07; level = intraluminal HU x 0.72). Obtained data indicated that the presence of different stenosis degrees did not modify visualization parameters.
摘要
CT血管造影（CTA）在检测钙化斑块方面具有很高的敏感性，但有时在狭窄程度的准确量化上会出现偏差，主要是由钙化斑块的高线性衰减系数导致的。本技术研究的目的是评估用于评估钙化斑块的最合适的CT窗参数，并指出其中哪些参数能提供最佳的观察者间一致性。散点图和回归结果分别显示了宽度和层面与管腔内亨氏单位（HU）值之间的相关性（宽度=管腔内HU×2.07；层面=管腔内HU×0.72）。获得的数据表明，不同狭窄程度的存在并未改变可视化参数。
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