Perfusion-weighted Map and Perfused Blood Volume in Comparison with CT Angiography Source Imaging in Acute Ischemic Stroke: Different Sides of the Same Coin?

被引：6
作者：
Buerke, Boris [1 ]
Wittkamp, Gunnar [1 ]
Med, Cand
Dziewas, Rainer [2 ]
Seidensticker, Peter [3 ]
Heindel, Walter
Kloska, Stephan P. [1 ,4 ]
机构：
[1] Univ Munster, Dept Clin Radiol, D-48149 Munster, Germany
[2] Univ Munster, Dept Neurol, D-48149 Munster, Germany
[3] Bayer Schering Pharma AG, BU Diagnost Imaging, D-13342 Berlin, Germany
[4] Univ Erlangen Nurnberg, Dept Neuroradiol, D-91054 Erlangen, Germany
来源：
ACADEMIC RADIOLOGY | 2011年 / 18卷 / 03期
关键词：
Computed tomography; source imaging; perfusion-weighted; cerebral infarction; CEREBRAL-ARTERY STROKE; SOURCE IMAGES; COMPUTED-TOMOGRAPHY; HYPERACUTE STROKE; INFARCT VOLUME; THERAPY; HYPOATTENUATION; THROMBOLYSIS; GUIDELINES; DISEASE;
D O I：
10.1016/j.acra.2010.10.013
中图分类号：
R8 [特种医学]; R445 [影像诊断学];
学科分类号：
1002 ; 100207 ; 1009 ;
摘要：
Rationale and Objectives: Computed tomography angiography source imaging (CTA-SI) in acute ischemic stroke improves detection rate and estimation of extent of cerebral infarction. This study compared the new components color-coded perfusion weighted map (PWM) and color-coded perfused blood volume (PBV) derived from CTA data with CTA-SI for the visualization of cerebral infarction. Materials and Methods: Fifty patients (women = 30; mean age = 74.9 +/- 13.3 years) underwent nonenhanced computed tomography and CTA for suspected acute ischemic stroke. PWM, PBV, and CTA-SI were reconstructed with identical slice thickness of 1.0 mm with commercial software. Extent of infarction was measured using the Alberta Stroke Program Early Computed Tomography Score (ASPECTS). For statistical analysis, Spearman's R correlation and paired-samples t-test was used. P < .05 was considered significant. Results: PBV had superior sensitivity for detection of cerebral infarction with 0.88 compared to PWM and CTA-SI with 0.79 and 0.76, respectively. The accuracy of correct diagnosis was superior for PBV with 0.82 compared to PWM and CTA-SI with 0.76, respectively. ASPECTS of PWM and PBV showed strong correlation with CTA-SI with r = 0.903 (P < .001) and r = 0.866 (P < .001), respectively. Mean ASPECTS of CTA-SI (6.24 +/- 3.62) revealed no significant difference with PWM (6.26 +/- 3.45), but a significant difference with PBV (5.62 +/- 3.41; P < .02). Conclusions: PWM was equal to CTA-SI in detection of cerebral infarction and estimation of extent of cerebral ischemia. Although PBV was superior to CTA-SI in detection of cerebral infarction, PBV seems to overestimate the extent of critical cerebral ischemia. Therefore, CTA-SI information is not identical to PBV and further clinical evaluation is mandatory.
引用
收藏
页码：347 / 352
页数：6
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