Diffusion neurography of facial nerve

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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.