rvg

Then digital X-ray film ( RVG) was radiographed in buccolingual and mesiodistal directions and was recorded.

然后拍摄颊舌向和近远中向数字化X线片（RVG），记录RVG影像图片。

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Methods To compare RVG image with conventional periapical radiography ( CPR).

方法对RVG和传统根尖周片（CPR）进行比较，由四名医师进行评判。

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Analysis on the causes of failing to take RVG images by dental nurses

牙科护士投照数字化牙片系统图像失败原因分析和放射防护

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Anterior prosthesis color were automatically designed in terms of artificial neural network and three stimulative value ( RVG) relative methods.

运用基于三刺激值的相对比色法原理，应用人工神经网络技术自动匹配，从而进行修复体的颜色设计。

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This is a relatively compared corporate valuation method; its object is computing and analyzing the RVG of the enterprises, and comparing the industry.

这是一种企业价值管理的相对比较方法，其研究目的是计算和分析企业的RVG值，并在整个行业内进行比较分析。

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Conclusion The distort rate of RVG image should be considered in clinical application.

结论本研究获得了有关RVG数字成像系统根尖片失真率的信息，为临床应用提供参考依据。

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METHODS: Compare RVG with conventional E-speed film for diagnosis the same tooth with oral diseases.

方法：对同一患牙用两法进行诊断比较。

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Results: For the RVG X-ray system the projecting angle was increased, especially for mandibular former teeth, comparing with conventional dental film.

统计确定每个牙位数字化牙片正确的投照角度和投照剂量。结果：与传统牙片比较，数字化牙片投照角度增加，其中以上颌后牙和下颌前牙角度增加较为明显。

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