Examination of digital radiography system for dental radiography at home

口腔内x线摄影有时是必要的卧床病人在家里。我们检查了一个传统的x射线胶片系统和一个数字x射线摄影系统，用于病人在家的x射线摄影。利用胶片系统，对60例患者拍摄了291张x线片。其中228张（87.3%）片质量可用于临床。63张影像质量不佳的原因分别为胶片位置不到位37张（12.7%）、运动模糊10张（3.4%）、投影角度不合适9张（3.1%）、切玉米7张（2.4%）。所使用的数字系统是一个便携式数字x射线CCD传感器（Visualix）系统，它由一个辅助工具（指示器）和一台笔记本电脑组成。使用数字系统，16例患者共拍摄了55张x线片。其中43张（78.2%）的x线片质量可用于临床。失败的原因分别是胶片在7张（12.7%）和5张（9.1%）x光片上模糊和位置不到位。没有x线片显示投影角度不足或锥形切割。与传统胶片系统相比，由胶片位置引起的x线片质量不足率从12%下降到9%。这个数字系统使我们能够在短时间内做出诊断，因为它不需要一个处理过程。从而缩短治疗时间。然而，也有一些问题需要解决。其中一个主要问题是由于CCD传感器的尺寸。要给两颗或多颗牙齿拍一张射线照片是很困难的。当传感器水平放置时，根尖未被充分地覆盖。该数字系统对卧床病人的口腔内x线摄影具有显著的优势。本研究结果于2004年12月16日在泰国举行的第五届亚洲口腔颌面放射学大会上发表。

Intraoral radiography is sometimes necessary for bedridden patients at home. We examined a conventional X-ray film system and a digital X-ray radiography system, for patient-at-home radiography. With the film system, 291 radiographs were taken in 60 patients. Of them, 228 (87.3%)radiographs showed sufficient quality for clinical use.The causes of 63radiographs showing insufficient quality were inadequate film position, blur by movement, unsuitable projection angle and corn cutting in 37 (12.7%), 10 (3.4%), 9 (3.1%) and 7 (2.4%) radiographs, respectively.The digital system used was a portable digital X-rays CCD sensor (Visualix) system that consisted of a supplementary tool (indicator) and a notebook computer. With the digital system, 55 radiographs were taken in 16 patients. Of them, 43 (78.2%) radiographs showed sufficient quality for clinical use. The failures were due to blurs and inadequate position of the film in 7 (12.7%) and 5 (9.1%) radiographs, respectively.There were no radiographs showing inadequate projection angle or cone cutting. The rate of insufficient quality radiographs caused by film position decreased from 12% to 9% in comparison with the conventional film system. This digital system enabled us to make diagnosis in a short time, because it did not need a processing course.Consequently, the treatment time would be shortened. However, there were some problems to be solved. One of major problems was due to the size of CCD sensor. It is difficult to take a radiographic image of two or more teeth. The root apex was not sufficiently included when the sensor was used in horizontal position.The digital system has significant advantages in intraoral radiography for bedridden patients.Were presented these research results at The 5th Asian Congress of Oral and Maxillo-Facial Radiology, and December 16, 2004 (Thailand).