Intraoral Radiography Training System in the Virtual Reality

口内x线摄影不仅对诊断有重要意义，而且对降低国家剂量也有重要意义。计算机技术的发展为我们提供了现代化的虚拟现实系统。在本研究中，我们开发了虚拟现实（VR）口腔内放射学培训系统，并对其有效性进行了评估。我们决定使用Omega Space （Solid ray，日本），因为它具有处理VR内容的能力，并且易于操作。VR内容采用干颅骨CT数据。几秒钟后，模拟x光显示出来。采用问卷调查法对牙科学校学生进行调查。VR系统对了解x射线源角度对成像的影响有较好的效果。对于图像的评价，我们使用了减法。该方法从图像中计算出的移动距离与实际图像差值具有较好的相关性。

Intraoral radiography is important for not only diagnosis but also national dose reduction. The development of computer technology gives us a modern virtual reality system. In this study, we develop intraoral radiography training system in virtual reality (VR) and its effectiveness was evaluated.We decided to use the Omega Space (Solid ray, Japan) because its handling capacity of VR contents and easy operability. CT data of a dry skull was used in VR content. The simulated x-ray displayed in a few seconds.The questionnaire survey was performed on the students of dental school. The VR system offered better effect on understanding of the effect of angulation of x-ray source on the radiography. For the evaluation of images, we used subtraction method. in this methods moved distance calculated from images were good correlated with actual difference of the images.