颧颌骨病变的平片和CT比较

回顾性分析经手术，病理证实的颧、颌骨病变的Ｘ线平片、断层摄影，ＣＴ扫描表现，讨论了合理选择不同检查方法，以提高诊断水平。方法４例颧骨、３例上颌骨行瓦氏位投照，２例硬腭行侧位投照，１１例下颌骨行正，侧位投照。２０例ＣＴ横轴位及冠状位扫描，其中４例静脉内注射造影剂后轴位检查。

Plain film and CT diagnosis for zygomaxillo- mandibular bone lesions

AIM To analyze retrospectively the results of plain film, X ray tomography and CT scannings of zygomaxillo mandibular bone disease confirmed by operation and pathology and to discuss how to choose the appropriate method in enhancing the rate of correct diagnosis. METHODS Of the 20 patients, 4 zygomae and 3 maxillae were on water projections, 2 hard plate on lateral projection and 11 mandibulae on posterioanterior and lateral pojections and panoramic tomography. All patients were given CT axial, coronal scannings, 4 of whom were given injection of contrast medium. RESULTS X ray plain( n =3) showed negative (15%), 2 panoramic tomography showed negative (10%). CT scannings were good in displaying the position, sign, size and the neighboring structures of the disease. The rate of qualitative diagnosis was 85%. CONCLUSION X ray films are simple, economical and effective in diagnosing the bone disease. CT is good in displaying the early lesions but not good enough in qualitative diagnosis combination of the X ray films and CT scannings can enhance the rate of correct diagnosis.