Ponce A Z, McDavid W D, Langland O E
Department of Oral Diagnosis, Fairleigh Dickinson University, Hackensack, New Jersey.
Oral Surg Oral Med Oral Pathol. 1988 Oct;66(4):513-7. doi: 10.1016/0030-4220(88)90280-0.
Using D and E speed film, intraoral exposures were made of a phantom at 70 and 90 kVp, with and without erbium filtration. Measurement of surface exposures indicates substantial reduction when erbium filtration was used. However, there was a visible loss of contrast. The raters agreed that radiographs made with E speed and D speed film, both with and without erbium filtration, were all of adequate diagnostic quality. The radiographs with the highest contrast were consistently preferred by all of the raters.
使用D速和E速胶片，在有和没有铒过滤的情况下，于70和90千伏峰值电压下对一个体模进行口腔内曝光。表面曝光量的测量表明，使用铒过滤时曝光量大幅降低。然而，对比度出现了明显损失。评估者一致认为，使用E速和D速胶片拍摄的、有和没有铒过滤的X光片，诊断质量均足够。所有评估者始终更喜欢对比度最高的X光片。
