Evaluation of the microstructure, chemical composition, and image quality of different PSP receptors

Pinto, Gustavo Nascimento de Souza; Nejaim, Yuri; Gomes, Amanda Farias; Canteras, Felippe Benavente; Freitas, Deborah Queiroz; Haiter-Neto, Francisco

doi:10.1590/1807-3107bor-2022.vol36.0130

Cited by 4 publications

(2 citation statements)

References 24 publications

(32 reference statements)

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“…A decrease in the mean of gray values calculated on a center ROI covering a wide area of the PSP represents an increase in the radiographic density 11 , 12 . Regarding the contrast variation, these values varied among the acquisitions groups without a pattern of increase or decrease.…”

Section: Discussionmentioning

confidence: 99%

“…Based on its location, another four ROIs of the same size were symmetrically distributed in the upper and lower corners of the radiograph ( Figure 1 -B). Subsequently, to analyze the overall noise of the image, the average of the standard deviation (SD) of gray values obtained for all ROIs was calculated 11 , 12 . Finally, the macro function available in the software was employed to standardize the position of the ROIs for all images evaluated.…”

Section: Methodsmentioning

confidence: 99%

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Could the radiographic image quality be affected by the excessive use of the photostimulable phosphor plate?

et al. 2023

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The study aimed to assess the influence of excessive use of a photostimulable phosphor plate (PSP) on the density, image noise, and contrast of radiographs. For that, radiographs of an acrylic block were acquired with a PSP of the Express intraoral system to assess the density and image noise. Initially, five images were obtained and exported (first group). After 400 exposures to X-rays and scannings of PSP, other five images were obtained and exported (second group). The same procedure was done after 800 (third group), 1200 (fourth group), 1600 (fifth group), and 2000 acquisitions (sixth group), resulting in 30 images to be evaluated. The mean and standard deviation of the gray values were calculated for the images using the ImageJ software. For contrast analysis, radiographs of an aluminum step-wedge were acquired with a new PSP following the same acquisition intervals. The percentage of contrast variation was calculated. Another two unused PSP receptors were employed to evaluate the method’s reproducibility. The comparison of the results among the acquisition groups was performed with one-way Analysis of Variance (α=0.05). Intraclass Correlation Coefficient (ICC) assessed the reproducibility of the receptors. Image noise did not differ among the groups (p>0.05). There was a slight increase in density after 400 acquisitions and a slight difference in contrast for all acquisition groups without a pattern of increase or decrease (p<0.05). ICC showed excellent reliability for the methods. Therefore, excessive PSP use slightly affected the radiograph’s density and contrast.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%