显影液耗尽对 DFL Contrast FV-58 和柯达 Insight 牙科胶片的影响。
Effects of developer exhaustion on DFL Contrast FV-58 and Kodak Insight dental films.
机构信息
Department of Radiology, College of Dentistry, Federal University of Paraiba, João Pessoa, PB, Brazil.
出版信息
Dentomaxillofac Radiol. 2011 Sep;40(6):358-61. doi: 10.1259/dmfr/81585198.
OBJECTIVES
The aim of this study was to compare the properties of the DFL Contrast FV-58 F-speed film (DFL Co., Rio de Janerio, Brazil) with the Kodak Insight E/F speed film (Eastman Kodak, Rochester, NY) in fresh and exhausted processing solutions. The parameters studied were the speed, average gradient and latitude.
METHODS
Five samples of each type of film were exposed under standardized conditions over 5 weeks. The films were developed in fresh and progressively exhausted processing solutions. Characteristic curves were constructed from values of optical density and radiation dose and were used to calculate the parameters. An analysis of variance was performed separately for film type and time.
RESULTS
DFL Contrast FV-58 film has a speed and average gradient that is significantly higher than Insight film, whereas the values of latitude are lower. Exhausted processing solutions were not significant in the parameters studied.
CONCLUSION
DFL Contrast FV-58 film has stable properties when exhausted manual processing solutions are used and can be recommended for use in dental practice, contributing to dose reduction.
目的
本研究旨在比较 DFL Contrast FV-58 快速胶片（DFL Co.，里约热内卢，巴西）和柯达 Insight E/F 速度胶片（Eastman Kodak，罗切斯特，NY）在新鲜和用尽处理液中的性能。研究的参数为速度、平均梯度和纬度。
方法
在 5 周内，将每种类型的胶片各 5 个样本在标准化条件下曝光。将胶片在新鲜和逐渐用尽的处理液中显影。从光密度和辐射剂量值构建特性曲线，并用于计算参数。分别对胶片类型和时间进行方差分析。
结果
DFL Contrast FV-58 胶片的速度和平均梯度明显高于 Insight 胶片，而纬度值较低。在研究的参数中，用尽的处理液并不重要。
结论
当使用耗尽的手动处理液时，DFL Contrast FV-58 胶片具有稳定的性能，可推荐用于牙科实践，有助于减少剂量。
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