Diffusion neurography of facial nerve

在显微镜线圈上尝试了几种序列对面神经的描绘。通过t1加权快速场回波（T1FFE）和平衡涡轮场回波（B-TFE）序列和多平面重构图像，我们能够描绘出腮腺内面神经。在T1FFE和Balanced TFE序列中，当腮腺肿瘤从面神经最外侧向内或与神经的距离小于0.5 mm或肿瘤与颞骨接触时（直接识别法），我们诊断为深层。直接鉴别法的灵敏度、特异度、准确度分别为71.4%、88.0%、80.0%。本研究认为，利用T1FFE和Balanced TFE直接鉴别腮腺肿瘤是否存在于深层是有益的。

As a result of having tried the depiction of the facial nerve by several kinds of sequences with microscopy coil. By T1-weighted Fast Field Echo(T1FFE) and Balanced Turbo Field Echo (B-TFE) sequence and multi planar reformation image, we were able to depict intraparotid facial nerve.We diagnosed the case with deep layer, when there was a parotid gland tumor inward from the most outside of the facial nerve, or the distance with the nerve was under minimum period of 0.5-mm or a tumor contacted with temporal bone in T1FFE and Balanced TFE sequence (Direct identification method). With Direct identification method, Sencitivity, Specificity, Accuracy showed 71.4%, 88.0%, 80.0%. In this study, it was suggested that Direct identification method using T1FFE and Balanced TFE is useful to determine parotid gland tumor exists in deep layer or not.