柯达Ektavision与富士Super HR-S全景放射摄影胶片的感光测定比较。
A sensitometric comparison of Kodak Ektavision and Fuji Super HR-S panoramic radiographic films.
作者信息
Wakoh M, Farman A G, Kitagawa H, Nishikawa K, Kuroyanagi K
机构信息
Department of Oral and Maxillofacial Radiology, Tokyo Dental College, Chiba, Japan.
出版信息
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1998 Aug;86(2):249-53. doi: 10.1016/s1079-2104(98)90133-0.
OBJECTIVES
The purpose of this study was to compare the combination of Ektavision film and Ektavision intensifying screen with the combination Super HR-S panoramic radiographic film and HR-4 intensifying screen with respect to sensitometric properties and the visualization of anatomic structures.
METHODS
The density response and resolution of both panoramic radiographic film/intensifying screen combinations were evaluated through use of the generated characteristic curves and the modulation transfer function. The diagnostic clarity was evaluated by five oral and maxillofacial radiologists who used a rating scale to evaluate the image clarity of selected anatomic structures.
RESULTS
The film speed and radiographic contrast, respectively, were 1.3 and 1.2 times higher for Ektavision than for Super HR-S. The image resolution with Ektavision was similar to that with Super HR-S. Ektavision was perceived to provide clearer images of the selected anatomic details than did Super HR-S.
CONCLUSION
With respect to the clarity of anatomic structures, Ektavision film, with its higher speed and higher contrast, proved superior to Super HR-S film.
目的
本研究旨在比较爱克发影像胶片与爱克发增感屏的组合，以及超级HR - S全景放射胶片与HR - 4增感屏的组合在感光特性和解剖结构可视化方面的差异。
方法
通过生成特性曲线和调制传递函数，评估两种全景放射胶片/增感屏组合的密度响应和分辨率。由五位口腔颌面放射科医生使用评分量表评估选定解剖结构的图像清晰度，以此来评价诊断清晰度。
结果
爱克发的胶片速度和射线对比度分别比超级HR - S高1.3倍和1.2倍。爱克发的图像分辨率与超级HR - S相似。与超级HR - S相比，爱克发被认为能提供更清晰的选定解剖细节图像。
结论
在解剖结构清晰度方面，爱克发胶片凭借其更高的速度和更高的对比度，被证明优于超级HR - S胶片。
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