術後性上顎嚢胞のMRI診断

概要

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Twelve patients with postoperative maxillary cysts were examined with magnetic resonance imaging (MRI), and the results were compared with the results from conventional tomography and CT.The exact location of these cysts could not be determined clearly via conventional tomography and CT, however, MRI showed the entire image of the cysts, even in the case of a small hidden cyst. With MRI multidirectional imaging, the extension of the cysts were easily identified without any image artifacts due to artificial teeth and MRI was valuable in deciding the surgical approaches. As well, in the case of these cysts, long spin echo (SE) showed a higher signal intensity than did short SE. Therefore, these cysts could be differentiated from any neoplastic mass which did not show a high signal intensity in long SE.MRI was superior to conventional tomography and CT in diagnosing postoperative maxillary cysts and will be widely used in the future.