Durability of imaging plates in clinical use

Langen, H. van; Castelijn, Tessa

doi:10.1016/j.ejmp.2009.01.001

Cited by 4 publications

(5 citation statements)

References 13 publications

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“…They concluded that image quality remained sufficiently high until an IP had been used 3000 times. Although in their study there was no relationship between exposure duration and MGV, there was a strong [16] also concluded that IPs did not deteriorate despite being subjected to repeated use and the passage of time; this is consistent with the results of our study.…”

Section: Discussionsupporting

confidence: 95%

“…Figure 7 shows a sample image of the readout from a scan of an IP that had been used 800 times. Van Langen and Castelijn [16] noted that IPs in frequent use may become scratched, and that the scratches that occur in the process of scanning may be the reason for the continual need for new IPs. With regard to intraoral IP systems, Bedard et al [14] reported that IPs that had been exposed 50 times had scratches, and that this increased the difficulty of interpretation.…”

Section: Discussionmentioning

confidence: 99%

“…The longevity of extraoral IPs has been examined previously by Van Langen and Castelijn [16], who assessed images of dry skull bones on extraoral IPs, each of which had been used from 191 to 3787 times over the course of 2 years. They concluded that image quality remained sufficiently high until an IP had been used 3000 times.…”

Section: Discussionmentioning

confidence: 99%

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Durability of Digora Optime® imaging plates

et al. 2011

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Objectives To assess the durability of the imaging plates (IP) supplied with the Digora Optime Ò digital imaging system in terms of their functionality after as many as 1000 exposures and the degree of signal fading that occurred after a delay of up to 144 h between exposure and scanning Methods The materials examined consisted of eight IPs. Three new and three used IPs were tested for signal fading, and the other two new IPs were exposed 1000 times and then tested for durability. The first exposure image data were used as baseline for comparison. The exposed IPs were then scanned 0, 5, 10, 30, and 60 min, and 3, 24, 72, and 144 h after exposure. Images without automatic gain control were used in both analyses. These images were exported as 24-bit tiff files with 8-bit gray value data, and mean gray values (MGVs) were measured and compared. Image gray value (IGV) in each image was calculated for statistical analysis. Immediately scanned pixel data were used as baseline for comparison. Statistical analysis was performed by ANOVA and use of Dunnett's multiple comparison test (P \ 0.05). Results There were no significant differences for up to 1000 exposures, and no significant difference was observed among images scanned with a delay of up to 3 h in new and used IPs. There was no significant difference between new and used IPs.

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Section: Discussionsupporting

confidence: 95%

Section: Discussionmentioning

confidence: 99%

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Durability of Digora Optime® imaging plates

et al. 2011

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“…Experimental errors in this field are thought to be caused by age-related degradation of the system, instability of the exposure dose, and the precision of the phantom. Although age-related degradation of the digital system affects sensitivity and contrast, it has been reported that the decrease is slight, with only a <1% decrease in signal intensity after 2 years of use [ 15 ]. According to the manufacturer's instructions, maintenance and inspection of FCR systems using PSP are recommended because the sensitivity decreases due to the age-related degradation of the laser tube used for reading.…”

Section: Discussionmentioning

confidence: 99%

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

Dashpuntsag

Yoshida

Kasai

et al. 2017

BioMed Research International

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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.

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“…The technological improvement of digital systems applied in digital imaging has led to the emergence of computed radiography (CR), which has replaced digital systems that produce analog videos. The CR technology employs photostimulable digitized phosphor plates, and the resulting clinical images can be displayed on any monitor (Alves et al, 2016;Hellén-Halme et al, 2016;Wrigley, 2004;van Langen & Castelijn, 2009).…”

Section: Introductionmentioning

confidence: 99%

Quality assessment of digital images produced using handheld X-ray equipment

Nóbrega

Daros

Policarpo

et al. 2022

RSD

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This study aimed at the assessment and monitoring of digital image quality parameters resulting from the use of portable X-ray equipment in clinical examinations. A multicentric study was conducted for quality assessment of images produced using the portable NOMAD® with the DIGORA® ™ Optime UV computed radiography (CR) system. The digital image quality was evaluated in terms of high- and low-contrast spatial resolution, contrast noise ratio (CNR), and signal-to-noise ratio (SNR). The samples comprised six biomaterials: zirconia (Zr), lyophilized bone (LB), photopolymerizable restorative resin (PRR), glass ionomer cement (GIC), GIC photopolymerizable (GICP), and double adhesive resin cement (DARC). The DICOM image (processed pixels) and raw data (without processing) were quantitatively analyzed. The qualitative visual analysis was performed in an adequately illuminated environment and then repeated in an environment equivalent to that of a clinical practice using conventional monitoring equipment. The relative biomaterial contrast was normalized by the high-contrast result of Zr. The Zr image demonstrated no noise because the standard deviation of the digital image biomaterial pixel mean was zero. In contrast, the relative SNR of the biomaterials was normalized by the DARC result. The relative CNR values according to different aluminum thicknesses were 0.11 for LB and 0.3–0.35 for PRR, GIC, and GICP. The spatial resolution was identical for both high-resolution and conventional monitors; however, for a 0.2-s clinical exposure, the resolution produced by the high-quality monitor increased. The quality control tests indicated the compatibility of the CR system-assisted portable X-ray equipment, verifying the status and image quality.

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Durability of imaging plates in clinical use

Cited by 4 publications

References 13 publications

Durability of Digora Optime® imaging plates

Durability of Digora Optime® imaging plates

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

Quality assessment of digital images produced using handheld X-ray equipment

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