使用宝石光谱成像评估颈动脉斑块：与磁共振血管造影的比较。
Carotid Plaque Evaluation Using Gemstone Spectral Imaging: Comparison with Magnetic Resonance Angiography.
作者信息
Shinohara Yuki, Sakamoto Makoto, Kuya Keita, Kishimoto Junichi, Yamashita Eijiro, Fujii Shinya, Kurosaki Masamichi, Ogawa Toshihide
机构信息
Division of Radiology, Department of Pathophysiological and Therapeutic Science, Faculty of Medicine, Tottori University, Yonago, Japan.
Division of Neurosurgery, Department of Neurological Sciences, Faculty of Medicine, Tottori University, Yonago, Japan.
出版信息
J Stroke Cerebrovasc Dis. 2017 Jul;26(7):1535-1540. doi: 10.1016/j.jstrokecerebrovasdis.2017.02.036. Epub 2017 Apr 11.
BACKGROUND
The present study compared the applicability of computed tomography carotid plaque imaging using effective Z maps with gemstone spectral imaging (GSI) to that of magnetic resonance plaque imaging using 3-dimensional time-of-flight magnetic resonance angiography.
METHODS
Stenosis was assessed in 18 carotid arteries of 14 patients, and the effective Z values of noncalcified carotid plaques were compared with the signal intensities of magnetic resonance angiography.
RESULTS
It was found that the effective Z value of noncalcified carotid plaques was significantly lower for a group with high signal intensity than for a group with low signal intensity on magnetic resonance angiography (P <.001). The area under the receiver operating characteristic curve of effective Z values was .975, and the presumed cutoff effective Z value required to discriminate low and high intensity plaques on magnetic resonance angiography was 7.83.
CONCLUSIONS
The effective Z value generated by GSI is a useful parameter to detect vulnerable carotid plaque materials.
背景
本研究比较了使用有效Z图的计算机断层扫描颈动脉斑块成像与宝石光谱成像（GSI）的适用性，以及使用三维时间飞跃磁共振血管造影的磁共振斑块成像的适用性。
方法
对14例患者的18条颈动脉进行狭窄评估，并将非钙化颈动脉斑块的有效Z值与磁共振血管造影的信号强度进行比较。
结果
发现在磁共振血管造影中，高信号强度组的非钙化颈动脉斑块有效Z值显著低于低信号强度组（P <.001）。有效Z值的受试者工作特征曲线下面积为0.975，在磁共振血管造影上区分低强度和高强度斑块所需的假定有效Z值截止值为7.83。
结论
GSI生成的有效Z值是检测易损颈动脉斑块物质的有用参数。
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