【摘要】 目的　研究计算机图像数字减影技术对常规牙齿 X线片的诊断作用。方法　应用研制开发的计算机图像数字减影系统对正常牙、牙周病及根尖周病的 X线片进行数字减影技术的检查与诊断。结果　本系统对普通牙齿、牙周病及根尖周病等 X线片进行各种图像处理 ,有助于了解病变的范围、大小及预后。结论　数字减影技术对牙齿 X线处理及诊断具有重要的临床应用价值更多还原

【Abstract】 Objective To investigate a digital substraction technique with computer image processing for diagnosis on dental X ray films.Methods The system of digital substraction technique developed by the authors was used to process the dental films of normal teeth, periodontal and periapical lesions in clinical diagnosis.Results The conventional dental films processed with the system could clearly show the location,size and prognosis of the lesions.Conclusion A digital substraction technique for diagnosis on conventional dental films is of great value in the clinical application.更多还原