Digitizing radiographic films: a simple way to evaluate indirect digital images
AUTOR(ES)
Rubia-Bullen, Izabel Regina Fischer, Escarpinati, Maurício Cunha, Schiabel, Homero, Vieira, Marcelo Andrade da Costa, Rubira, Cássia Maria Fischer, Lauris, José Roberto Pereira
FONTE
Journal of Applied Oral Science
DATA DE PUBLICAÇÃO
2007-02
RESUMO
OBJECTIVES: This study applied a simple method to evaluate the performance of three digital devices (two scanners and one digital camera) using the reproducibility of pixel values attributed to the same radiographic image. METHODS: Using the same capture parameters, a radiographic image was repeatedly digitized in order to determine the variability of pixel values given to the image throughout the digitization process. One coefficient value was obtained and was called pixel value reproducibility. RESULTS: A significant difference in pixel values was observed among the three devices for the digitized images (ANOVA, p<0.00001). There was significant pixel value variability at the same digitization conditions for one scanner and the digital camera. CONCLUSIONS: Digital devices may assign pixel values differently in consecutive digitization depending on the optical density of the radiographic image and the equipment. The pixel value reproducibility was not satisfactory as tested for two devices. It is maybe advisable knowing the digitization variations regarding pixel values whenever using digital radiography images in longitudinal clinical examinations.
Documentos Relacionados
- Chitosan and Agaricus brasiliensis Polysaccharides Films: A Preliminary Study
- Comparison of radiographic measurements obtained with conventional an indirect digital imaging during endontic treatment
- Hydrophobic plasma polymerized hexamethyldisilazane thin films: characterization and uses
- Condom Use and High-Risk Sexual Acts in Adult Films: A Comparison of Heterosexual and Homosexual Films
- Validation of a scale to evaluate Digital Dependence of Employees