scholarly journals Effectiveness of Two Types of Photostimulable Phosphor Plate Plastic Barrier Envelopes for Prevention of Microbiological Contamination

2020 ◽  
Vol 20 ◽  
Author(s):  
Nafiseh Nikkerdar ◽  
Alisha Akya ◽  
Atefeh Khavid ◽  
Atena Karimi ◽  
Setareh Emadi
Keyword(s):  
Microbiological Contamination ◽  
Photostimulable Phosphor ◽  
Phosphor Plate ◽  
Photostimulable Phosphor Plate

Benefits of using a photostimulable phosphor plate protective device

2021 ◽  
pp. 20200339
Author(s):  
Graziela de Moura ◽  
Mariana Boessio Vizzotto ◽  
Priscila Fernanda da Silveira Tiecher ◽  
Nádia Assein Arús ◽  
Heraldo Luis Dias da Silveira
Keyword(s):  
Image Quality ◽  
Compressive Load ◽  
Control Group ◽  
Protective Device ◽  
Photostimulable Phosphor ◽  
Plate Size ◽  
Phosphor Plate ◽  
Photostimulable Phosphor Plate ◽  
Post Hoc ◽  
Gray Values

Objectives: To develop and test a protective device (PD) to increase the resistance of photostimulable storage phosphor (PSP) plate to compressive load, and assess the resulting image quality. Methods: Two prototypes, polyvinylchloride sheets of 0.3 mm and 0.7 mm each, were developed for PSP plate size 2. The resistance to compressive load was tested using eight new PSPs divided into four test groups: (1) PSP, (2) PSP and paperboard protector, (3) PSP and 0.3 mm PD, and (4) PSP and 0.7 mm PD. The resulting images were analyzed by three oral radiologists, based on the consensus for image artifacts. Additionally, the objective image quality test was performed with four new PSPs, using an 8-step wedge aluminum scale. The mean gray values and standard deviation were measured in a total of 240 images, and the data were analyzed using analysis of variance with Bonferroni post-hoc test. Results: Artifacts were seen in the PSP control group starting at 40 n, and at 150 n, 175 n and 300 n in 0.3 mm PD, paperboard protector and 0.7 mm PD, respectively. Although there was no statistical difference among groups, there were differences between exposure times (0.06–0.25 s, 0.06–0.40 s, and 0.10–0.40 s). Scanning resolution of 20 lp/mm showed higher mean gray value than 25 and 40 lp/mm (p < 0.05) Conclusion: The developed PDs improved the PSP resistance to compressive forces, with low interference on the pixel gray values, regardless of exposure time and spatial resolution. Nevertheless, the 0.7 mm PD could withstand the maximum compressive load.

scholarly journals Numerical Evaluation of Image Contrast for Thicker and Thinner Objects among Current Intraoral Digital Imaging Systems

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Oyunbat Dashpuntsag ◽  
Midori Yoshida ◽  
Ryosuke Kasai ◽  
Naoki Maeda ◽  
Hidehiko Hosoki ◽  
...  
Keyword(s):  
Digital Imaging ◽  
Imaging Systems ◽  
Diagnostic Purpose ◽  
Metallic Material ◽  
Low Contrast ◽  
Photostimulable Phosphor ◽  
Phosphor Plate ◽  
Digital Imaging Systems ◽  
Photostimulable Phosphor Plate ◽  
Small Bone

The purpose is to evaluate the performance of current intraoral digital detectors in detail using a precise phantom and new method. Two aluminum step wedges in 0.5 mm steps were exposed by two photostimulable phosphor plate (PSP) systems—one with automatic exposure compensation (AEC) and the other without AEC—and a CCD sensor. Images were obtained with 3 doses at 60 kV. The effect of metallic material also was evaluated. The contrast-to-noise ratio (CNR) for thinner steps and the low contrast value (LCV) for thicker steps were obtained. The CCD system was the best under all conditions (P<0.001), although the Gray value was sensitive to the dose, and the Gray value-dose relation varied greatly. The PSP system with AEC was superior to that without AEC for the LCV (P<0.001) but was inferior to it regarding the CNR (P<0.001). CNR and LCV in the PSP system without AEC were not affected by the metallic plate. Intraoral digital imaging systems should be chosen according to their diagnostic purpose. PSP system with AEC may be the best for detecting molar proximal caries, whereas the PSP system without AEC may be better for evaluating small bone regeneration in periodontal disease. The CCD system provided the best performance.

scholarly journals Evaluation of the effects of processing delays and protective plastic cases on image quality of a photostimulable phosphor plate system

2008 ◽  
Vol 16 (5) ◽  
pp. 350-354 ◽  
Author(s):  
Clóvis Monteiro Bramante ◽  
Alexandre Silva Bramante ◽  
Rogério Emílio de Souza ◽  
Ivaldo Gomes Moraes ◽  
Norberti Bernardineli ◽  
...  
Keyword(s):  
Image Quality ◽  
Photostimulable Phosphor ◽  
Phosphor Plate ◽  
Photostimulable Phosphor Plate ◽  
Plate System

scholarly journals In vitro comparison of two photostimulable phosphor plate systems for early detection of occlusal dentin caries with and without a sharpening filter

2020 ◽  
Vol 14 (4) ◽  
pp. 223-227
Author(s):  
Roghieh Bardal ◽  
Mahshid Mobini ◽  
Matin Mirzaee
Keyword(s):  
Statistical Significance ◽  
Occlusal Caries ◽  
Caries Diagnosis ◽  
Dentin Caries ◽  
Significant Difference ◽  
Photostimulable Phosphor ◽  
Phosphor Plate ◽  
Photostimulable Phosphor Plate ◽  
Sensitivity Specificity

Background. Dental caries is the most important reason for tooth loss. Clinical examination is the most commonly used technique for occlusal caries diagnosis. The diagnostic power of digital systems is a matter of controversy in this field. The present study aimed to determine the diagnostic accuracy of two photostimulable phosphor plate (PSP) systems for early occlusal dentin caries in vitro. Methods. Sixty-nine extracted molar and premolar teeth were used in this study. The teeth were mounted in triple blocks, and standard radiographs were taken by the Digora and Acteon digital radiographic systems. The original and filter 1-enhanced radiographs were evaluated by two experienced observers twice at an interval of two weeks, and dentin caries was recorded in Tables prepared for the study. The teeth were then sectioned in a buccolingual direction and evaluated under a stereomicroscope. The observers’ reports were compared with microscopic findings as the gold standard. SPSS 23 was used to calculate the kappa coefficient, sensitivity, specificity, and area under the ROC curve (AUC). Statistical significance was set at P<0.05. Results. The internal and the external agreements in both imaging systems were good to excellent. The means of sensitivity, specificity, and AUC in the Acteon system were 34.1, 92.9, and 0.674, with 30.8, 94.8, and 0.659, respectively, in the Digora system. Conclusion. The accuracy of early occlusal caries diagnosis was poor on both systems, and no significant difference was observed between the two systems at a 95% confidence interval. Although the AUC was slightly higher in the original images, there was no significant difference between them; however, due to their high specificity, they can prevent unnecessary treatments in the clinic.

scholarly journals Investigating the Effect of Different Metal Sheets on Reducing Radiation Behind Intraoral Digital Phosphor Plates During Intraoral Radiography using Gray Value

2020 ◽  
Vol 14 (1) ◽  
pp. 704-710
Author(s):  
Mojdeh Mehdizadeh ◽  
Mohammad Bagher Tavakoli ◽  
Farida Ghazanfari Moghaddam
Keyword(s):  
Stainless Steel ◽  
Test Procedure ◽  
Significant Difference ◽  
Metal Sheets ◽  
Photostimulable Phosphor ◽  
Phosphor Plate ◽  
The Mean ◽  
Photostimulable Phosphor Plate ◽  
Phosphor Plates ◽  
Gray Values

Purpose: To assess the efficacy of metal sheets with different thicknesses on reducing the radiation behind the photostimulable phosphor plate (PSP) during intraoral periapical examinations. Materials and Methods: In this study, a phantom head was used to investigate the effect of using metal sheets of aluminum, stainless steel, and copper with three thicknesses of 0.5, 0.75 and 1mm on reducing the radiation behind PSP. Images were acquired at 66 kVp 8 mA, and 0.16 s using the long-cone paralleling technique. The images were saved and exported to DICOM format without any post-processing. Then, they were transferred to an image processing software (Mimics, Materialize, Leuven, Belgium), and their mean gray values (MGV) were determined. The acquired data were statically analyzed for accessing the significant difference in groups means using ANOVA, and the means of groups were compared using Tukey’s test procedure. Results: The MGV of the second PSP differed significantly from those PSPs slotted with various metals (p<0.001). The MGV for lead and stainless steel at 0.5 mm thickness was insignificant (p = 0.852), but differed significantly from other metals. The MGV for PSPs with 0.75 mm stainless steel and 1 mm copper slots were varied significantly from those of all other PSP and metals. The 1 mm copper group was significantly different from all other groups (p<0.001). Conclusion: Using the mean gray value of the PSP, the use of various metal sheets of different thicknesses could effectively reduce the radiation behind the PSPs during periapical radiographs.

Comparison of Efficiency and Image Quality of Photostimulable Phosphor Plate and Charge-Coupled Device Receptors in Dental Radiography

2019 ◽  
Vol 83 (10) ◽  
pp. 1205-1212
Author(s):  
Wenjian Zhang ◽  
Carolyn Huynh ◽  
Aniket Jadhav ◽  
Jose Pinales ◽  
Liliana Arvizu ◽  
...  
Keyword(s):  
Image Quality ◽  
Dental Radiography ◽  
Charge Coupled Device ◽  
Photostimulable Phosphor ◽  
Phosphor Plate ◽  
Photostimulable Phosphor Plate
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