Grey value contrast sensitivity of dental practitioners in function of luminance and age

Jacquet, Wolfgang; Cleymaet, Roberto; Bottenberg, Peter

doi:10.1259/dmfr.20180398

Cited by 3 publications

(1 citation statement)

References 24 publications

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“…Minimal statistical differences were indicated as significant because there was a consistency in the values obtained in the acquisition groups, and, consequently, low SD values. Therefore, by analyzing the data in the tables, it can be seen that the values are very close, and those differences would probably not be noticed by a human’s eye 16 .…”

Section: Discussionmentioning

confidence: 99%

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%

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

et al. 2023

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Influence of extensive use of a photostimulable phosphor receptor on the diagnosis of proximal carious lesions: An in vitro study

Ruiz

Gomes

Fontenele

et al. 2023

Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology

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Peracetic acid efficacy on disinfection of photostimulable phosphor plates

Ruiz,

Ocampo,

Franco

et al. 2024

Dentomaxillofacial Radiology

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Objectives To evaluate the antimicrobial efficacy of white vinegar, acetic acid, and peracetic acid on photostimulable phosphor (PSP) plates disinfection, and to assess the disinfectant influence on the radiographic quality. Methods Eight PSP plates (Express system) were contaminated with Streptococcus mutans and Candida albicans. These plates were wiped with tissues without any substance, with white vinegar, acetic acid, and peracetic acid, followed by an agar imprint. Number of microbial colonies formed was recorded. Afterwards, the quality of radiographs was tested using the more efficient disinfectant. Before disinfection and after every five disinfections, two radiographs of an acrylic-block and two radiographs of an aluminium step-wedge were acquired for each plate. Density, noise, uniformity, and contrast were analysed. Three oral radiologists evaluated the images for the presence of artefacts. One-way analysis of variance compared changes on grey values among the disinfections (α = .05). Intra- and inter-examiner agreement for the presence of artefacts was calculated by weighted Kappa. Results Peracetic acid was the only one that eliminated both microorganisms. Density and uniformity decreased after 100 disinfections, and contrast changed without a pattern in the course of disinfections (P ≤ .05). Small artefacts were observed after 30 disinfections. Intra- and inter-examiner agreements were almost perfect. Conclusions Disinfection with peracetic acid eliminated both microorganisms. However, it also affected density, uniformity, and contrast of radiographs, and led to the formation of small artefacts.

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Grey value contrast sensitivity of dental practitioners in function of luminance and age

Cited by 3 publications

References 24 publications

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

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

Influence of extensive use of a photostimulable phosphor receptor on the diagnosis of proximal carious lesions: An in vitro study

Peracetic acid efficacy on disinfection of photostimulable phosphor plates

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