Contrast-enhanced 3D MR DSA of the carotid artery bifurcation: preliminary study of comparison with unenhanced 2D and 3D time-of-flight MR angiography.
Contrast-enhanced 3D MR DSA of the carotid artery bifurcation: preliminary study of comparison with unenhanced 2D and 3D time-of-flight MR angiography.
复制标题
颈动脉分叉处的对比增强 3D MR DSA：与非增强 2D 和 3D 飞行时间 MR 血管造影比较的初步研究。
DOI：
10.1148/radiology.208.2.9680574
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
Grist,TM
中科院分区：
文献类型：
--
作者：
Willig,DS;Turski,PA;Frayne,R;Graves,VB;Korosec,FR;Swan,JS;Mistretta,CA;Grist,TM
目的比较三维（3D）磁共振（MR）数字减影血管造影（DSA）图像与二维（2D）和三维飞行时间（TOF） MR血管造影图像对颈动脉分叉处狭窄的描绘。材料与方法对26例颈动脉有29处分叉并有脑缺血症状的患者行3D MR DSA检查。注射加多二胺后3D MR DSA生成时间分辨序列。颈动脉检查分辨率为0.4 x 0.4 x 1.0 mm，每隔4.5秒重建一次体积。将3D MR DSA图像与同时获取的未增强2D和3D TOF图像进行比较。两名观察员根据以下内容对2D和3D TOF MR血管造影和3D MR DSA图像进行排序：(a)狭窄描绘，(b)颈内动脉描绘，(c)血管内信号强度，(d)诊断置信度。结果3D MR DSA的诊断置信度平均排名为1.10（1 =最佳技术，3 =最差技术）。与2D TOF和3D TOF合并评分相比，3D MR DSA评分明显优于2D TOF评分（P < 0.01）。在其他标准中也发现了类似水平的统计学显著性。结论三维MR DSA通过消除饱和效应和减少体内减相来改善颈动脉狭窄的描绘。表面形态和几乎闭塞的血管（“字符串符号”）很容易识别。该技术在识别颈动脉闭塞方面的信心也非常高。
PURPOSETo compare the delineation of stenosis at the carotid artery bifurcation on three-dimensional (3D) magnetic resonance (MR) digital subtraction angiographic (DSA) images with that on two-dimensional (2D) and 3D time-of-flight (TOF) MR angiographic images.MATERIALS AND METHODSTwenty-six patients with 29 carotid artery bifurcations and symptoms of cerebral ischemia underwent 3D MR DSA. A time-resolved series was generated with 3D MR DSA after the bolus injection of gadodiamide. The resolution for a carotid artery examination was 0.4 x 0.4 x 1.0 mm, with volumes reconstructed at 4.5-second intervals. The 3D MR DSA images were compared with contemporaneously acquired unenhanced 2D and 3D TOF images. Two observers ranked the 2D and 3D TOF MR angiographic and 3D MR DSA images according to the following: (a) stenosis delineation, (b) internal carotid artery delineation, (c) intravascular signal intensity, and (d) diagnostic confidence.RESULTSThe mean ranking for diagnostic confidence was 1.10 (1 = best technique, 3 = worst technique) for 3D MR DSA. Compared with the pooled 2D TOF and 3D TOF ranks, the 3D MR DSA rank was significantly better (P < .01). Similar levels of statistical significance were found for the other criteria.CONCLUSIONThree-dimensional MR DSA improves the delineation of carotid arterial stenosis by virtually eliminating saturation effects and reducing intravoxel dephasing. Surface morphology and nearly occluded vessels ("string sign") were easily identified. Confidence in identifying carotid arterial occlusions was also very high with this technique.