Accelerated territorial arterial spin labeling based on shared rotating control acquisition: an observer study for validation
Accelerated territorial arterial spin labeling based on shared rotating control acquisition: an observer study for validation
复制标题
基于共享旋转控制采集的加速区域动脉旋转标记：用于验证的观察者研究
DOI：
10.1007/s00234-011-0919-2
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发表时间：
2011
期刊：
影响因子：
2.8
通讯作者：
H. Honda
中科院分区：
文献类型：
--
作者：
H. Kamano;T. Yoshiura;A. Hiwatashi;K. Yamashita;Y. Takayama;E. Nagao;Koji Sagiyama;I. Zimine;H. Honda
引言与常规控制采集方案相比，共享旋转控制采集可将区域动脉自旋标记（tASL）的成像时间缩短33%，但由于磁化传递补偿不完善，可能导致血管区域估计不准确。我们的目的是验证的准确性的共享旋转控制采集方法在评估vasculardizations.MethodsTwenty-four患者进行了tASL在3.0-T MRI与传统的正常控制采集方法。复合血管领域地图，其中的血流从右，左颈内动脉和后循环编码的红色，绿色，蓝色，作为一个正常的平均控制标签计划和模拟共享旋转控制计划。两名观察员独立报告了在三个标记后时间点对应于动脉节段的26个脑区中最主要的区域血流。使用κ statistics.ResultsOverall inter-reader agreements进行分析的读者间和方法间的协议是优秀的正常对照和共享旋转控制方法（κ = 0.98，分别）。总体方法间一致性也很好（κ = 0.98），虽然在双侧大脑后动脉区域（κ = 0.79至0.93）中注意到相对较低的一致性。结论我们的结果表明，使用共享旋转控制采集的tASL可以提供与使用正常控制采集获得的血管区域相当的信息，同时大大缩短成像时间。
IntroductionShared rotating control acquisition can shorten the imaging time of territorial arterial spin labeling (tASL) by 33% compared with the normal control acquisition scheme but potentially results in an inaccurate estimate of vascular territories due to imperfect magnetization transfer compensation. Our purpose was to validate the accuracy of the shared rotating control acquisition method in evaluation of vascular territories.MethodsTwenty-four patients underwent tASL at a 3.0-T MRI with the conventional normal control acquisition method. Composite vascular territory maps, in which the blood flows from the right and left internal carotid arteries and the posterior circulation were encoded in red–green–blue, were generated as a normal averaged control-label scheme and as a simulated shared rotating control scheme. Two observers independently reported the most dominant territorial flow in 26 brain regions corresponding to the arterial segments at three post-labeling time points. Inter-reader and inter-method agreements were analyzed using κ statistics.ResultsOverall inter-reader agreements were excellent for both the normal control and the shared rotating control methods (κ = 0.98, respectively). Overall inter-method agreement was also excellent (κ = 0.98), although relatively low agreement was noted in the bilateral posterior cerebral artery territories (κ = 0.79 to 0.93).ConclusionOur results suggested that tASL using shared rotating control acquisition can provide information on the vascular territories comparable to that obtained using the normal control acquisition while substantially shortening the imaging time.