Gustavo Nascimento de Souza-Pinto1, Gustavo Machado Santaella2, Amanda Achkar Coli3, Anne Caroline Oenning1, Francisco Haiter-Neto1. 1. Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil. 2. Radiology and Imaging Sciences, Department of Diagnosis and Oral Health, University of Louisville, Louisville, KY, USA. 3. Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, SP, Brazil.
Abstract
OBJECTIVES: To assess, objectively to determine the deterioration of the photostimulable phosphor plates (PSPs) after several acquisitions. METHODS: Two new PSPs without preliminary use were exposed with an intraoral X-ray unit, and the EXPRESS® (Instrumentarium Imaging, Tuusula, Finland) unit was used for scanning of the PSPs. A 12-stepwedge aluminum scale were used superimposed with the PSPs during the X-rays exposures to perform the objective analyses. Objective analysis was carried out by mean gray values using the Image J software through a region of interest (ROI) of 0.1 × 0.1 mm, and the data were analyzed statistically using ANOVA. RESULTS: For each, the Express® PSP a total of 1800 images were acquired during 60 days. The objective analysis showed loss of the mean gray values between the initial and final images. Besides, the percentage of mean gray values' loss was between 0.7%, for the thickest step, and 8.4%, for the lowest thickness step. CONCLUSION: After many X-ray exposures of the Express® PSP a singular deterioration in the mean gray values could be observed.
OBJECTIVES: To assess, objectively to determine the deterioration of the photostimulable phosphor plates (PSPs) after several acquisitions. METHODS: Two new PSPs without preliminary use were exposed with an intraoral X-ray unit, and the EXPRESS® (Instrumentarium Imaging, Tuusula, Finland) unit was used for scanning of the PSPs. A 12-stepwedge aluminum scale were used superimposed with the PSPs during the X-rays exposures to perform the objective analyses. Objective analysis was carried out by mean gray values using the Image J software through a region of interest (ROI) of 0.1 × 0.1 mm, and the data were analyzed statistically using ANOVA. RESULTS: For each, the Express® PSP a total of 1800 images were acquired during 60 days. The objective analysis showed loss of the mean gray values between the initial and final images. Besides, the percentage of mean gray values' loss was between 0.7%, for the thickest step, and 8.4%, for the lowest thickness step. CONCLUSION: After many X-ray exposures of the Express® PSP a singular deterioration in the mean gray values could be observed.
Entities:
Keywords:
digital images; durability; photostimulable phosphor plates; radiography