Three-dimensional true FISP for high-resolution imaging of the whole brain
Three-dimensional true FISP for high-resolution imaging of the whole brain
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DOI：
10.1007/s00330-003-1846-3
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发表时间：
2003-07-01
影响因子：
5.9
通讯作者：
Reith, W
中科院分区：
文献类型：
--
作者：
Schmitz, B;Hagen, T;Reith, W
虽然高分辨率T1加权序列，如三维磁化准备的快速梯度回波成像，是广泛可用的，但缺乏一个等效的快速高分辨率序列提供T2对比。使用快速的高性能梯度系统，我们展示了三维真正的快速成像与稳态进动（FISP），以填补这一空白的可行性。我们在1.5 T Sonata（Siemens，埃尔兰根，德国）磁共振扫描仪上应用三维真FISP协议，体素尺寸降至0.5x0.5x0.5 mm，采集时间约为8 min。该序列被纳入常规脑成像协议的患者与脑脊液相关的颅内病理。来自20名患者和20名健康志愿者的图像由两名神经放射科医生评价诊断图像质量和伪影。所有真实FISP扫描均显示患者和志愿者的成像质量极佳，无伪影。它们对纳入患者的解剖和病理方面的评估是有价值的。高分辨率真FISP成像是颅内病变探查和神经导航的一种有价值的辅助手段，特别是在涉及脑脊液的情况下。
While high-resolution T1-weighted sequences, such as three-dimensional magnetization-prepared rapid gradient-echo imaging, are widely available, there is a lack of an equivalent fast high-resolution sequence providing T2 contrast. Using fast high-performance gradient systems we show the feasibility of three-dimensional true fast imaging with steady-state precession (FISP) to fill this gap. We applied a three-dimensional true-FISP protocol with voxel sizes down to 0.5x0.5x0.5 mm and acquisition times of approximately 8 min on a 1.5-T Sonata (Siemens, Erlangen, Germany) magnetic resonance scanner. The sequence was included into routine brain imaging protocols for patients with cerebrospinal-fluid-related intracranial pathology. Images from 20 patients and 20 healthy volunteers were evaluated by two neuroradiologists with respect to diagnostic image quality and artifacts. All true-FISP scans showed excellent imaging quality free of artifacts in patients and volunteers. They were valuable for the assessment of anatomical and pathologic aspects of the included patients. High-resolution true-FISP imaging is a valuable adjunct for the exploration and neuronavigation of intracranial pathologies especially if cerebrospinal fluid is involved.