Yalcinkaya S, Künzel A, Willers R, Thoms M, Becker J
Department of Oral Surgery, Heinrich Heine University, Düsseldorf, Germany.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2006 May;101(5):643-51. doi: 10.1016/j.tripleo.2005.08.003. Epub 2006 Jan 19.
To compare the different digital filters implemented in the Dürr Vistascan system with conventional film and to analyze the filter specificity to anatomic structures.
Ten panoramic image pairs and 10 periapical image pairs (1 digital and 1 conventional) were obtained from 20 patients conventionally and digitally. The display quality of different anatomic image structures was rated subjectively on a 5-point scale. The responses were evaluated using ANOVA and Tukey-Kramer post hoc tests. The intraobserver reliability was evaluated by Cohen's kappa statistics.
The display quality of anatomic structures was rated higher by using Caries 1 or 2 filters for periapical and Periodontal 1 or 2 filters for panoramic images, whereas nonfiltered and Noise Reduction-filtered images received the lowest scorings compared to all other digital image modalities (P < or = .0097). The superiority of conventional radiographs to the digital ones was statistically significant (P < or = .0039 and P < or = .0152 respectively).
Depending on the diagnostic task, digital images of the Vistascan system should be filtered before examination. Perfect conventional radiographs still remain the gold standard for image quality.
比较Dürr Vistascan系统中实现的不同数字滤波器与传统胶片，并分析滤波器对解剖结构的特异性。
从20名患者中常规和数字化获取10对全景图像和10对根尖周图像（1张数字图像和1张传统图像）。不同解剖图像结构的显示质量采用5分制进行主观评分。使用方差分析和Tukey-Kramer事后检验对结果进行评估。观察者内信度通过Cohen's kappa统计量进行评估。
对于根尖周图像，使用龋齿1或2滤波器，对于全景图像，使用牙周1或2滤波器时，解剖结构的显示质量评分更高，而与所有其他数字图像模式相比，未滤波和降噪滤波的图像得分最低（P≤0.0097）。传统X线片相对于数字X线片的优越性具有统计学意义（分别为P≤0.0039和P≤0.0152）。
根据诊断任务，Vistascan系统的数字图像在检查前应进行滤波。完美的传统X线片仍然是图像质量的金标准。
