Siewert C, Hosten N, Felix R
Strahlenklinik und Poliklinik, Universitäts-Klinikum Rudolf Virchow, Standort Wedding, Freie Universität Berlin.
Rofo. 1994 Jul;161(1):44-50. doi: 10.1055/s-2008-1032490.
T2-weighted spin-echo imaging is the standard screening procedure in MR imaging of the neurocranium. We evaluated fast spin-echo T2-weighted imaging (TT2) of the neurocranium in comparison to conventional spin-echo T2-weighted imaging (T2). Signal-to-noise and contrast-to-noise ratio of normal brain tissues (basal ganglia, grey and white matter, CSF fluid) and different pathologies were calculated. Signal-to-noise ratio and contrast-to-noise ratio were significantly higher in TT2 than in T2 (with the exception of gray-to-white matter contrast). Tissues with increased content of water protons (mobile protons) showed the highest contrast to surrounding tissues. The increased signal intensity of fat must be given due attention in fatty lesions. Because the contrast-to-noise ratio between white matter and basal ganglia is less in TT2, Parkinson patients have to be examined by conventional T2. If these limitations are taken into account, fast spin-echo T2-weighted imaging is well appropriate for MR imaging of the neurocranium, resulting in heavy T2-weighting achieved in a short acquisition time.
T2加权自旋回波成像是颅神经磁共振成像的标准筛查程序。我们将颅神经的快速自旋回波T2加权成像（TT2）与传统自旋回波T2加权成像（T2）进行了比较评估。计算了正常脑组织（基底神经节、灰质和白质、脑脊液）和不同病变的信噪比及对比噪声比。TT2中的信噪比和对比噪声比显著高于T2（灰质与白质对比除外）。水质子（可移动质子）含量增加的组织与周围组织的对比度最高。在脂肪性病变中，必须充分注意脂肪增加的信号强度。由于TT2中白质与基底神经节之间的对比噪声比更低，帕金森病患者必须采用传统T2进行检查。如果考虑到这些局限性，快速自旋回波T2加权成像非常适合颅神经的磁共振成像，可在短采集时间内实现重度T2加权。
