MRI Quantitative T2*Mapping to Predict Dominant Composition of In Vitro Thrombus

被引:17
作者
Bourcier, R. [1 ]
Pautre, R. [1 ]
Mirza, M. [3 ]
Castets, C. [4 ]
Darcourt, J. [5 ]
Labreuche, J. [6 ]
Detraz, L. [1 ]
Desal, H. [1 ]
Serfaty, J. -M. [2 ]
Toquet, C. [7 ]
机构
[1] CHU Nantes, Hop Rene & Guillaume Laennec, Dept Neuroradiol, Nantes, France
[2] CHU Nantes, Hop Rene & Guillaume Laennec, Dept Cardiac & Vasc Imaging, Nantes, France
[3] Neuravi Thromboembol Initiat, Galway, Ireland
[4] Siemens Healthineers France, St Denis, Reunion, France
[5] CHU Toulouse, Hop Purpan, Dept Neuroradiol, Toulouse, France
[6] Univ Lille, CHU Lille, Dept Biostat, Lille, France
[7] CHU Nantes, Hotel Dieu, Dept Pathol, Nantes, France
关键词
SUSCEPTIBILITY VESSEL SIGN; ISCHEMIC-STROKE; ENDOVASCULAR TREATMENT; STENT RETRIEVERS; RECANALIZATION; THROMBECTOMY;
D O I
10.3174/ajnr.A5938
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
BACKGROUND AND PURPOSE: MR imaging quantitative T2* mapping, which provides information about thrombus composition and specifically the red blood cell content, may be obtained in the setting of acute ischemic stroke before treatment. This could be useful to adapt the endovascular strategy. We aimed to analyze the red blood cell content of in vitro thrombi in relation to the thrombus-T2* relaxation time. MATERIALS AND METHODS: Thirty-five thrombus analogs of different compositions were scanned with an MR imaging quantitative T2* mapping sequence. Two radiologists, blinded to thrombus composition, measured the thrombus-T2* relaxation time twice at an interval of 2 weeks. Quantitative histologic evaluations of red blood cell content were performed. Inter-and intraobserver reproducibility of the thrombus-T2* relaxation time was assessed by calculating intraclass correlation coefficients. Finally, a Spearman product moment correlation between the thrombus-T2* relaxation time and red blood cell content was performed. RESULTS: The median thrombus-T2* relaxation time was 78.5 ms (range, 16-268 ms; interquartile range, 60.5 ms). The median red blood cell content was 55% (range, 0%-100%; interquartile range, 75%). Inter- and intraobserver reproducibility of the thrombus-T2* relaxation time was excellent (>0.9). The Spearman rank correlation test found a significant inverse correlation between thrombus-T2* relaxation time and red blood cell content (rho = -0.834, P < .001). CONCLUSIONS: MR imaging quantitative T2* mapping can reliably identify the thrombus red blood cell content in vitro. This fast, easy-to-use sequence could be implemented in routine practice to predict stroke etiology and adapt devices or techniques for endovascular treatment of acute ischemic stroke.
引用
收藏
页码:59 / 64
页数:6
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