THE DEVELOPMENT OF IMAGE DIAGNOSTIC DATABSE OF ORAL & MAXILLOFACIAL DISEASE AND INTEGRATION OF VALUE-AIDED EDUCATIONAL RESEARCH SUPPORTING FUNCTIONS

1)从患者中选择适合建立影像诊断数据库的影像根据口腔病变影像诊断的难易程度，得到6种影像诊断的水平分布模式。计算各疾病组的系数，按肿瘤、炎症、囊肿、畸形、创伤和其他疾病的顺序排列影像诊断的难度。通过研究影像诊断水平与患者影像特征之间的关系，得到如下结果：研究生牙医的特征表现是：(1)由于病变较小而没有特征，(2)与其他疾病非常相似，(3)非常罕见，(4)难以估计病因，(5)复发。在牙科学生的水平上，特征发现是(1)每种疾病的主要特征表现，(2)扩展…后的附加发现更多的疾病；(3)感染引起的改变。由于患者的图像结果应尽可能地从具有上述特征的患者中选择，包括与某些疾病相似的正常解剖变异。(1)1024×1024像素的图像可以在9.9秒内通过学校局域网系统从已有的图像数据库中传输到新的图像诊断工作站。(2)全景图像(940×1160像素)可在1秒内从Macintosh PC机上以DICOM3型图像格式传输。(3)从Macintosh PC检索影像诊断数据库中有关患者的多个字母数字信息中的合适项，然后在影像诊断工作站上显示我们所需要的口腔病变的图像。较少

1) Selection of images from patients suitable for an image diagnostic databaseSix patterns of level distribution for image diagnosis were obtained, according to the difficulty to diagnose the images of oral lesions. Calculating coefficients of each disease group, and the difficulty of image diagnosis was arranged in the decreasing order of Tumor, Inflammation, Cyst, Anomaly, Trauma and other diseases. From examining the relationships between the image diagnostic levels and characteristic findings of images from patients the following results were obtained : At the level of a postgraduate dentist characteristic findings were (1) no characteristics because of the small size of the lesion, (2) very similar findings to other diseases, (3) very rare findings, (4) difficulty to estimate the cause of disease, and (5) findings of recurrence. At the level of a dental student characteristic findings were (1) main characteristic findings of each disease, (2) additional findings following expansio … More n of disease, (3) findings modified by infection. As the results of images from patients suitable for image diagnostic database should be selected from patients which show the above mentioned characteristics, as far as possible, including normal anatomical variations which resemble some kinds of diseases. Finally images suitable for diagnostic databases and characteristic findings of each disease were selected.2) Technical sides of the image diagnostic database to accumulate digital images electronically(1) Images of 1024*1024 pixels could be transferred by FTP in 9.9 seconds through the university's LAN system from the image database, which already we had, to the new image diagnostic workstation. (2) Panoramic image (940*1160 pixels) could be transferred within one second from a Macintosh PC in DICOM3 type image format. (3) Suitable items from multiple alpha-numeric information concerning patients from the image diagnostic database were referred from the Macintosh PC.Then images of oral lesions, which we needed, could be displayd on the image diagnostic workstation. Less