Magnetic resonance imaging protocols for examination of the neurocranium at 3 T
Magnetic resonance imaging protocols for examination of the neurocranium at 3 T
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DOI：
10.1007/s00330-003-1984-7
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发表时间：
2003-09-01
影响因子：
5.9
通讯作者：
Heindel, W
中科院分区：
文献类型：
--
作者：
Schwindt, W;Kugel, H;Heindel, W
随着高场(3T)磁共振扫描仪可用性的提高，需要调整和优化临床成像方案，以利用理论上较高场强的高信噪比(SNR)。我们的目的是建立可靠和稳定的方案，以满足临床对3T脑颅成像的需求。200名具有广泛适应症的患者接受了3T脑颅成像技术的检查，并对几个成像参数进行了优化。使扫描时间与1.5T的扫描时间相当，我们提高了空间分辨率。对比度增强和平扫T1加权成像最好分别应用梯度回波和反转恢复(而不是自旋回波)技术。对于液体衰减反转恢复(FLAIR)成像，120ms的TE产生最佳对比噪声比(CNR)。在合理的扫描时间内获得了高分辨率的各向同性3D数据集。一些伪影明显，但总体上成像受益于较高的SNR。我们提出了一套优化的3T神经成像检查方案，在临床常规环境下被证明是可靠的。
The increasing availability of high-field (3 T) MR scanners requires adapting and optimizing clinical imaging protocols to exploit the theoretically higher signal-to-noise ratio (SNR) of the higher field strength. Our aim was to establish reliable and stable protocols meeting the clinical demands for imaging the neurocranium at 3 T. Two hundred patients with a broad range of indications received an examination of the neurocranium with an appropriate assortment of imaging techniques at 3 T. Several imaging parameters were optimized. Keeping scan times comparable to those at 1.5 T we increased spatial resolution. Contrast-enhanced and non-enhanced T1-weighted imaging was best applying gradient-echo and inversion recovery (rather than spin-echo) techniques, respectively. For fluid-attenuated inversion recovery (FLAIR) imaging a TE of 120 ms yielded optimum contrast-to-noise ratio (CNR). High-resolution isotropic 3D data sets were acquired within reasonable scan times. Some artifacts were pronounced, but generally imaging profited from the higher SNR. We present a set of optimized examination protocols for neuroimaging at 3 T, which proved to be reliable in a clinical routine setting.