爱克发速显Plus牙科X线胶片的实验室评估

A laboratory evaluation of Ektaspeed Plus dental X-ray film.

作者信息

Horner K, Rushton V E, Shearer A C

机构信息

Turner Dental School, Manchester University, UK.

出版信息

J Dent. 1995 Dec;23(6):359-63. doi: 10.1016/0300-5712(94)00018-b.

DOI:10.1016/0300-5712(94)00018-b

PMID:8530727

Abstract

OBJECTIVES

The aim of this study was to make a laboratory evaluation of the image quality of a new dental X-ray film, Ektaspeed Plus, compared with Ektaspeed and Ultraspeed films.

METHODS

Films of each emulsion type underwent a range of exposures at both 50 kVp and 70 kVp, and characteristic curves were constructed to give a comparison of fog, speed and contrast. Line pair and contrast detail test objects were used to assess the resolution of radiographs and the ability of the two film types to reproduce minor differences in subject contrast. The sensitivity of the emulsions to safelighting for a range of times was also tested.

RESULTS

Ektaspeed Plus had the same speed, a slightly higher base plus fog density but a higher contrast (50 and 70 kVp) than Ektaspeed. The speed of Ektaspeed Plus was higher and the contrast similar to that of Ultraspeed film. Limiting resolutions of the three films were the same. There was a slightly better imaging of one contrast detail phantom with Ektaspeed Plus compared to Ektaspeed at 70 kVp only. All three emulsions were insensitive to recommended safelighting conditions.

CONCLUSION

The improved image contrast of Ektaspeed Plus may be more acceptable to dentists than Ektaspeed and lead to a greater acceptance of E-speed film, contributing to dose reduction.

摘要

目的

本研究旨在对一种新型牙科X线胶片Ektaspeed Plus的图像质量进行实验室评估，并与Ektaspeed和Ultraspeed胶片进行比较。

方法

每种乳剂类型的胶片在50 kVp和70 kVp下进行一系列曝光，并绘制特性曲线以比较灰雾度、感光度和对比度。使用线对和对比度细节测试物体来评估射线照片的分辨率以及两种胶片类型再现物体对比度微小差异的能力。还测试了乳剂在一系列时间内对安全灯的敏感性。

结果

Ektaspeed Plus与Ektaspeed具有相同的感光度，基础加灰雾密度略高，但对比度更高（50和70 kVp）。Ektaspeed Plus的感光度更高，对比度与Ultraspeed胶片相似。三种胶片的极限分辨率相同。仅在70 kVp时，与Ektaspeed相比，Ektaspeed Plus对一个对比度细节模型的成像略好。所有三种乳剂对推荐的安全灯条件均不敏感。