Study of qualitative diagnostic ability using dynamic contrast-enhanced MRI in oral and maxillofacial region

动态增强MRI（DCE-MRI）对某些肿瘤的鉴别诊断是有用的，它已被用于识别良恶性肿瘤之间的差异。我们还利用DCE-MRI显示了头颈部几种病变的特征，如下：1）在舌下肿瘤中，DCE-MRI可用于鉴别良恶性肿瘤，并可用于检测舌下癌中肿瘤的范围。2）在孤立性骨囊肿中，DCE-MRI可为孤立性骨囊肿与其他囊肿或肿瘤的鉴别提供有用的信息。3）在鳞状细胞癌中，增殖细胞核抗原标记指数与DCE-MRI参数（最大CI和最大CI增益）显著相关。DCE-MRI参数的评估可以为口腔癌患者的肿瘤细胞增殖提供有价值的信息。4）在考虑了多形性腺瘤的各种图像沿着可能的病变类型后，5）ICE-MRI对恶性淋巴瘤和鳞状细胞癌的鉴别诊断有一定价值。6）MRI和DCE-MRI对恶性淋巴瘤的鉴别诊断有一定的参考价值。MRI表现是牙源性腺瘤样瘤的特征性表现，可作为鉴别牙源性腺瘤样瘤与影像学检查中可能存在的病变的依据。

Dynamic contrast-enhanced MRI (DCE-MRI) is useful for differential diagnosis of some tumors and it has been used to identify the differences between benign and malignant tumors. We have also shown characteristic features of several lesions using DCE-MRI in head and neck regions as follows,1) In the sublingual tumors, the DCE-MRI may be useful in differentiating malignant from benign tumors, and in detecting the extent of the tumors in the sublingual carcinomas.2) In the solitary bone cyst, DCE-MRI can provide useful information for distinguishing solitary bone cysts from other cysts or tumors.3) In the squamous cell carcinomas, proliferating cell nuclear antigen labeling index shows a significant correlation with DCE-MRI parameters (maximum CI and maximum CI gain). The assessment of DCE-MRI parameters may provide valuable information for tumor cell proliferation of patients with oral cancer.4) After considering the various images of pleomorphic adenoma along with the possible types of lesions, pleomorphic adenoma might be diagnosed using the features visible with MRI and DCE-MRI.5) ICE-MRI might be useful for distinguishing malignant lymphoma from squamous cell carcinomas.6) The MRI and DCE-MRI features are characteristic features of adenomatoid odontogenic tumor and may be a basis for differentiating adenomatoid odontogenic tumor from the possible lesions in radiographic examinations.