MRI is more sensitive than ct in detecting the skull base encroachment. MRI could reveal the early infiltration of the bone marrow and tumor infiltration along the mandibular nerve.

MRI较CT对颅底骨质破坏的检出更敏感，MRI可以发现肿瘤沿三叉神经向颅内侵犯，而卵圆孔没有骨质破坏。

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CONCLUSIONS: MRI is more sensitive than ct in detecting skull base bone destruction and retropharyngeal lymph node involvement of NPC.

结论：MRI对鼻咽癌颅底骨质破坏和咽后淋巴结的检出率高于CT。

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MRI was superior to CT in finding small lesion, early focus and lesions near the base of the skull and the top of the brain.

MRI对微小的病变，早期的病变及颅底、颅顶部的病变的显示均较CT优越。

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