Development of digital intraoral radiography using imeging plate

使用ST、HR、TEM型IP和改进的UR型，以50微米、100微米和150微米的孔径读取和记录体模的图像，并研究IP类型与体模外形、大小和图像质量的关系。结果表明：1.高分辨率IP并不一定能提供高质量的图像。2.激电仪的成像质量取决于分辨率和S/N比的平衡。3.对于IP的读取和记录，孔径尺寸的减小都会导致图像质量的提高。4.在三种孔径大小下，UR的图像质量最好。5.图像处理改善了HR和UR图像的质量，即使在100um^2和150um^2时也是如此。这些发现表明，在分辨率和S/N比率之间取得良好平衡的IP有助于在100um^2的孔径范围内进行口腔内计算机摄影。这种IP的使用提供了与传统口腔内摄影相当的图像。

With the use of IP of the ST,HR,TEM and modified UR types, images of a phantom were read and recorded at the aperture sizes of 50 mum^2,100 mum^2, and 150 mum^2, and the relationship of the type of IP to the apeture, size and image quality was investigated. The results were obtained that : 1.High-resolution IP does not necessarily provide images with high image quality. 2.The radiographic image quality of the IP depends on the equilibration of resolution and the S/N ratio. 3.For both reading and recording of IP,a decrease of the aperture size resulted in improvement of image quality. 4.UR showed the best image quality at the three type of aperture size. 5.Image processing improved the quality of HR and UR images, even at the aperture sizes of 100mum^2 and 150mum^2. These findings suggest that the use of IP with a good balance between resolution and the S/N ratio facilitates intraoral computed radiography at the aperture size of 100mum^2. Such use of IP provides an image that is comparable to that of conventional intraoral radiography.