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Barrineau AB, Mah P, Mallya SM. Improvements in image quality after optimization in digital intraoral radiographs. J Am Dent Assoc 2023; 154:24-31. [PMID: 36402578 DOI: 10.1016/j.adaj.2022.09.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/26/2022] [Accepted: 09/17/2022] [Indexed: 11/17/2022]
Abstract
BACKGROUND Digital intraoral radiographic exposures are optimized largely on the basis of subjective assessment of diagnostic image quality. This study presents an objective approach to optimize radiographic exposure settings for digital intraoral radiographic systems. METHODS Seven size 2 digital intraoral systems were assessed for image quality and determination of optimal exposure following the protocol specified in American National Standard Institute/American Dental Association Standard No. 1094: Quality Assurance for Digital Intra-Oral Radiographic Systems. A ProX radiograph unit (Planmeca) at 63 kVp and 6 mA was used to obtain radiographs of the Dental Digital Quality Assurance phantom. ImageJ software (National Institutes of Health) was used to quantify dynamic range and spatial resolution, and contrast perceptibility was evaluated visually. Optimal exposure is the setting with the maximal contrast perceptibility and spatial resolution while displaying the full dynamic range. After image optimization, a custom phantom consisting of an endodontically prepared tooth was imaged to evaluate the file position relative to the apex for each system. Differences in distances between file position relative to the root apex at the optimal exposure as well as 1 increment above and below were measured. RESULTS Radiographic images obtained at the optimal exposure yielded better visualization and more accurate measurements of the file tip relative to the apex. CONCLUSIONS Optimizing radiographic exposures improves image quality and accuracy in clinical decisions. PRACTICAL IMPLICATIONS Improvement in image quality and better accuracy in actual distance of the endodontic file to the radiographic apex coupled with complete cleaning, shaping, and obturation of the canal should lead to better endodontic treatment outcomes.
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Mah P, Buchanan A, Reeves TE. The Importance of the ANSI/ADA Standard for Digital Intraoral Radiographic Systems: A Pragmatic Approach to Quality Assurance. Oral Surg Oral Med Oral Pathol Oral Radiol 2022; 135:117-128. [PMID: 36117096 DOI: 10.1016/j.oooo.2022.07.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 06/06/2022] [Accepted: 07/08/2022] [Indexed: 10/16/2022]
Abstract
The need for quality assurance (QA) for digital dental radiography has existed since the introduction of digital imaging; however, the methods and phantoms required to achieve it were not available. This resulted in a chaotic approach to address QA based largely upon subjective analysis of image quality. The American National Standards Institute (ANSI)/American Dental Association (ADA) Quality Assurance Standard 1094 for Digital Intraoral Radiographic Systems (DIRS) presents a paradigm shift to a scientific and objective method of QA rather than one based on subjective assessments. This standard takes into account the contributions of all components of the digital imaging chain that affect final image quality rather than assessing the various components in isolation. The optimal image is determined for each DIRS through objective analysis of the image quality properties of dynamic range, spatial resolution, and contrast perceptibility. Image optimization, a critical component of a quality assurance program, is the proper balance between diagnostic image quality and radiation dose to the patient. This publication counters disseminated myths and misconceptions with scientific evidence and will help dental practitioners appreciate and understand the benefits of the new ANSI/ADA Standard on QA for DIRS.
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SOUZA-PINTO GND, NEJAIM Y, GOMES AF, CANTERAS FB, FREITAS DQ, HAITER-NETO F. Evaluation of the microstructure, chemical composition, and image quality of different PSP receptors. Braz Oral Res 2022; 36:e130. [DOI: 10.1590/1807-3107bor-2022.vol36.0130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 05/02/2022] [Indexed: 12/23/2022] Open
Affiliation(s)
| | - Yuri NEJAIM
- Universidade Federal do Mato Grosso do Sul, Brazil
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Marinho-Vieira LE, Martins LAC, Freitas DQ, Haiter-Neto F, Oliveira ML. Revisiting dynamic range and image enhancement ability of contemporary digital radiographic systems. Dentomaxillofac Radiol 2021; 51:20210404. [PMID: 34860568 PMCID: PMC9499203 DOI: 10.1259/dmfr.20210404] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES To assess the dynamic range and enhancement ability of radiographs acquired with contemporary digital systems. METHODS Five repeated periapical radiographs of human mandibles with an aluminium step-wedge were acquired using two sensor-based and three photostimulable phosphor plate-based systems and an X-ray unit at ten exposure times 0.020, 0.032, 0.063, 0.080, 0.100, 0.200, 0.320, 0.400, 0.500, and 0.630 s. All images had their brightness and contrast enhanced by two experienced oral and maxillofacial radiologists in consensus and were exported as both the original and enhanced file formats. Mean grey values were obtained from the aluminium steps and tabulated with their corresponding thicknesses for each exposure time, digital radiographic system, and file format. Images with saturated steps were excluded and the mean grey values from the remaining images were averaged to assess image brightness and the angular coefficient of the linear trendlines was generated from the relationship between mean grey values and their corresponding aluminium thicknesses to assess image contrast. Brightness and contrast values were compared using two-way ANOVA with post-hoc Tukey (α = 0.05). RESULTS Photostimulable phosphor plate-based digital radiographic systems had a broader dynamic range. Longer exposure times produced original images with lower brightness and variable contrast (p < 0.05). Subjective enhancement significantly increased or reduced brightness and/or contrast in some systems (p < 0.05). CONCLUSIONS Contemporary digital radiographic systems present different dynamic ranges and exposure-related brightness and contrast. Image enhancement may be a valuable tool at slightly suboptimal exposure times.
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Affiliation(s)
- Luiz Eduardo Marinho-Vieira
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba-SP, Brazil
| | - Luciano Augusto Cano Martins
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba-SP, Brazil
| | - Deborah Queiroz Freitas
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba-SP, Brazil
| | - Francisco Haiter-Neto
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba-SP, Brazil
| | - Matheus L Oliveira
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba-SP, Brazil
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Campbell RE, Anderson D, Strauss K, Brown C, Fenchel M, Wilson S, Scarfe W. Comparison of technical errors in pediatric bitewing radiographs acquired with round vs rectangular collimation. Oral Surg Oral Med Oral Pathol Oral Radiol 2021; 133:333-342. [PMID: 34627711 DOI: 10.1016/j.oooo.2021.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 08/30/2021] [Accepted: 09/04/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVE To compare technical errors in bitewing radiographs acquired with round vs rectangular collimation in a hospital-based pediatric dentistry training program. STUDY DESIGN A retrospective chart review was conducted of 176 digital bitewing radiographs exposed with round collimation and 106 exposed with rectangular collimation. The number of re-exposures was calculated, and errors in central ray entry (CRE; "cone cuts"), horizontal and vertical positioning, and angulation were measured. RESULTS There were no greater re-exposures but significantly more CRE errors with rectangular collimation (21.7%; n = 23; 95% confidence interval [CI], 13.9%-30.0%) than with round collimation (3.4%; n = 6; 95% CI, 0.7%-6.1%). CRE error location, horizontal positioning errors, and size of horizontal overlapped contacts were statistically different but not clinically important. CONCLUSIONS Use of rectangular collimation resulted in increased CRE errors but no other clinically significant problems. This technique should be used to reduce radiation exposure to patients.
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Affiliation(s)
- Richard E Campbell
- University of Cincinnati College of Medicine, Cincinnati, OH, USA; Division of Pediatric Dentistry and Orthodontics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
| | - Dave Anderson
- University of Cincinnati College of Medicine, Cincinnati, OH, USA; Division of Pediatric Dentistry and Orthodontics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Keith Strauss
- Department of Radiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Carolyn Brown
- Division of Pediatric Dentistry and Orthodontics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Matthew Fenchel
- Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Stephen Wilson
- University of Cincinnati College of Medicine, Cincinnati, OH, USA; Division of Pediatric Dentistry and Orthodontics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - William Scarfe
- Division of Radiology and Imaging Science, Department of Surgical and Hospital Dentistry, University of Louisville School of Dentistry, Louisville, KY, USA
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The Chairside Periodontal Diagnostic Toolkit: Past, Present, and Future. Diagnostics (Basel) 2021; 11:diagnostics11060932. [PMID: 34067332 PMCID: PMC8224643 DOI: 10.3390/diagnostics11060932] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 05/07/2021] [Accepted: 05/19/2021] [Indexed: 12/22/2022] Open
Abstract
Periodontal diseases comprise a group of globally prevalent, chronic oral inflammatory conditions caused by microbial dysbiosis and the host immune response. These diseases specifically affect the tooth-supporting tissues (i.e., the periodontium) but are also known to contribute to systemic inflammation. If left untreated, periodontal diseases can ultimately progress to tooth loss, lead to compromised oral function, and negatively impact the overall quality of life. Therefore, it is important for the clinician to accurately diagnose these diseases both early and accurately chairside. Currently, the staging and grading of periodontal diseases are based on recording medical and dental histories, thorough oral examination, and multiple clinical and radiographic analyses of the periodontium. There have been numerous attempts to improve, automate, and digitize the collection of this information with varied success. Recent studies focused on the subgingival microbiome and the host immune response suggest there is an untapped potential for non-invasive oral sampling to assist clinicians in the chairside diagnosis and, potentially, prognosis. Here, we review the available toolkit available for diagnosing periodontal diseases, discuss commercially available options, and highlight the need for collaborative research initiatives and state-of-the-art technology development across disciplines to overcome the challenges of rapid periodontal disease diagnosis.
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Acri G, Gurgone S, Iovane C, B Romeo M, Borzelli D, Testagrossa B. A Novel Phantom and a Dedicated Developed Software for Image Quality Controls in X-Ray Intraoral Devices. J Biomed Phys Eng 2021; 11:151-162. [PMID: 33937123 PMCID: PMC8064129 DOI: 10.31661/jbpe.v0i0.2001-1061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 03/09/2020] [Indexed: 11/22/2022]
Abstract
Background: Periodic quality control (QC) procedures are important in order to guarantee the image quality of radiological equipment and are also conducted using phantoms simulating human body. Objective: To perform (QC) measurements in intraoral imaging devices, a new and simple phantom was manufactured. Besides, to simplify QC procedures, computerized LabView-based software has been devised, enabling determination of image quantitative parameters in real time or during post processing. Material and Methods: In this experimental study, the novel developed phantom consists of a Polymethyl methacrylate (PMMA) circular insert. It is able to perform a complete QC image program of X-ray intraoral equipment and also causes the evaluation of image uniformity, high and low contrast spatial resolution, image linearity and artefacts, with only two exposures. Results: Three raters analyzed the images using the LabView dedicated software and determined the quantitative and qualitative parameters in an innovative and accurate way. Statistical analysis evaluated the reliability of this study. Good accuracy of the quantitative and qualitative measurements for the different intraoral systems was obtained and no statistical differences were found using the inter-rater analysis. Conclusion: The achieved results and the related statistical analysis showed the validity of this methodology, which could be proposed as an alternative to the commonly adopted procedures, and suggested that the novel phantom, coupled with the LabView based software, could be considered as an effective tool to carry out a QC image program in a reproducible manner.
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Affiliation(s)
- Giuseppe Acri
- PhD, Department of Biomedical and Dental Sciences and Morphofunctional Imaging (BIOMORF), University of Messina, Italy
| | - Sergio Gurgone
- MSc, Department of Mathematical and Computational Sciences, Physics Sciences and Earth Sciences, (MIFT) University of Messina, Italy
| | | | - Marco B Romeo
- MSc, Forensic Science Investigation, Carabinieri Section Messina, Italy
| | - Daniele Borzelli
- PhD, Department of Biomedical and Dental Sciences and Morphofunctional Imaging (BIOMORF), University of Messina, Italy
| | - Barbara Testagrossa
- PhD, Department of Biomedical and Dental Sciences and Morphofunctional Imaging (BIOMORF), University of Messina, Italy
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Alérico MS, Panzarella FK, França FMG, Lima CADS, Junqueira JLC, Raitz R. Effect of image acquisition parameters on the radiopacity of bulk-fill and nanocomposite resins. Oral Surg Oral Med Oral Pathol Oral Radiol 2020; 132:217-224. [PMID: 33184008 DOI: 10.1016/j.oooo.2020.10.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 10/07/2020] [Accepted: 10/11/2020] [Indexed: 11/20/2022]
Abstract
OBJECTIVE This study evaluated the radiopacity of 2 bulk-fill resins (SonicFill and Filtek Bulk Fill) and a nanocomposite (Filtek Z350 XT) resin compared with enamel, dentin, and aluminum as measured with different exposure parameters. STUDY DESIGN Resin disks were radiographed together with a 1-mm human tooth section and an aluminum stepwedge, at exposure times of 0.2 and 0.32 s, and source-image (S-I) distances of 30 and 40 cm, using complementary metal oxide semiconductor (CMOS) and photostimulable phosphor systems. Grayscale values were measured using ImageJ software. Paired Student t tests were used to compare the effect of the receptor on grayscale values for each material. Analysis of variance was used to evaluate the effects of receptor, exposure parameters, and the resins on radiopacity. RESULTS All resins exhibited greater radiopacity scores than enamel and were significantly different from each other. Filtek Z350 produced the lowest radiopacity values, whereas SonicFill produced the highest. The radiopacity values were higher on images acquired with CMOS receptors. Receptor type, exposure time, S-I distance, and material, as well as many interactions of these parameters, affected the radiopacity of the resins. CONCLUSION The tested resins complied with ISO 4049. Exposure parameters and digital receptors affected their radiopacity.
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Affiliation(s)
- Mariah Scotti Alérico
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas, Division of Oral Radiology, Campinas, Brazil
| | - Francine Kühl Panzarella
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas, Division of Oral Radiology, Campinas, Brazil.
| | | | | | | | - Ricardo Raitz
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas, Division of Oral Radiology, Campinas, Brazil
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Souza-Pinto GND, Santaella GM, Coli AA, Oenning AC, Haiter-Neto F. Analysis of the deterioration of photostimulable phosphor plates. Dentomaxillofac Radiol 2020; 49:20190500. [DOI: 10.1259/dmfr.20190500] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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.
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Affiliation(s)
- Gustavo Nascimento de Souza-Pinto
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - Gustavo Machado Santaella
- Radiology and Imaging Sciences, Department of Diagnosis and Oral Health, University of Louisville, Louisville, KY, USA
| | - Amanda Achkar Coli
- Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, SP, Brazil
| | - Anne Caroline Oenning
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - Francisco Haiter-Neto
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
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10
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Buchanan A, Hancock R, Kalathingal S. The role of software in quality assurance for indirect digital intraoral imaging. Oral Surg Oral Med Oral Pathol Oral Radiol 2020; 130:313-321. [DOI: 10.1016/j.oooo.2020.03.043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 03/05/2020] [Accepted: 03/14/2020] [Indexed: 11/24/2022]
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Aydin KC, Demirel O, Özcan M. Comparison of two digital intraoral radiography imaging systems as a function of contrast resolution and exposure time. ACTA ACUST UNITED AC 2020; 69:148-152. [PMID: 32610723 DOI: 10.23736/s0026-4970.19.04286-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND To compare the image quality of two different digital imaging systems; one photostimulable phosphor plate system (PSP) and a direct digital radiography system with CMOS imaging sensor; via evaluating contrast resolution among four different exposure times. METHODS Endodontically treated incisor teeth embedded in paraffin blocks are aligned next to a 99.5% Al wedge and exposed for 0.8, 0.1,0.125 and 0.16 seconds using both the CMOS and PSP systems. Using ImageJ software, 5 isometric and isogridded ROI from each root filling area and isometric ROI from the Al stepwedge were calculated. RESULTS Evaluation of the total of 120 images displayed that PSP system produced significantly higher contrast resolution (P<0.05) in regard to pixel values than the CMOS. The CMOS system was non- responsive to increasing dose (P=0.000). Regarding the EqAl values, no significant difference was determined between groups (P>0.05). CONCLUSIONS The contrast resolution was higher using the PSP system. It can be estimated that, filling material will be more obvious under lower doses using PSP.
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Affiliation(s)
- Kader C Aydin
- Department of Dentomaxillofacial Radiology, School of Dentistry, Istanbul Medipol University, Istanbul, Turkey -
| | - Oğuzhan Demirel
- Department of Dentomaxillofacial Radiology, School of Dentistry, Istanbul, Turkey
| | - Mutlu Özcan
- Unit of Dental Materials Unit, Center for Dental and Oral Medicine, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, Zürich, Switzerland
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Reeves TE, Lien W, Mah P. Quality assurance: acceptance testing for digital dental intraoral sensors. Oral Surg Oral Med Oral Pathol Oral Radiol 2020; 129:388-400. [DOI: 10.1016/j.oooo.2019.11.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 11/01/2019] [Accepted: 11/08/2019] [Indexed: 11/29/2022]
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Farias Gomes A, Nejaim Y, Fontenele RC, Haiter-Neto F, Freitas DQ. Influence of the incorporation of a lead foil to intraoral digital receptors on the image quality and root fracture diagnosis. Dentomaxillofac Radiol 2019; 48:20180369. [PMID: 30982341 DOI: 10.1259/dmfr.20180369] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To evaluate the quality of images obtained with the addition of a lead foil to intraoral digital receptors. METHODS Radiographic images of 34 single-rooted human teeth - 19 with vertical root fracture (VRF) and 15 of the control group - were obtained with and without the addition of a lead foil, using the VistaScan, Express, Digora Optime and Digora Toto systems. Images were evaluated by five observers regarding the diagnosis of VRF, using a 5-point scale. In a second moment, an observer preference analysis related to the presence of the lead foil was performed. Images of an acrylic phantom were also obtained with and without the addition of a lead foil, and the quantities of uniformity, grey value and standard deviation of grey values were obtained. RESULTS There were no significant differences in the VRF diagnostic values, considering the presence of the lead foil. Regarding the image quality preference, the observers preferred images acquired with the lead foil for all systems tested, but with greater values for Digora Optime (61.33%) and Express (61.33%). The presence of the lead foil did influence the image uniformity in all systems tested ( p < 0.05). Moreover, the lead foil increased the mean of grey values for Digora Optime and Express images ( p < 0.05), however it did not influence the SD in any of the digital systems ( p > 0.05). CONCLUSION The addition of a lead foil to intraoral digital receptors produces a positive effect in the image quality objectively detected by means of uniformity and subjective visual preference.
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Affiliation(s)
- Amanda Farias Gomes
- Department of Oral Diagnosis - Dental Radiology, Piracicaba Dental School, State University of Campinas, São Paulo, Brazil
| | - Yuri Nejaim
- Department of Oral Diagnosis - Dental Radiology, Piracicaba Dental School, State University of Campinas, São Paulo, Brazil
| | - Rocharles Cavalcante Fontenele
- Department of Oral Diagnosis - Dental Radiology, Piracicaba Dental School, State University of Campinas, São Paulo, Brazil
| | - Francisco Haiter-Neto
- Department of Oral Diagnosis - Dental Radiology, Piracicaba Dental School, State University of Campinas, São Paulo, Brazil
| | - Deborah Queiroz Freitas
- Department of Oral Diagnosis - Dental Radiology, Piracicaba Dental School, State University of Campinas, São Paulo, Brazil
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Clark JL, Wadhwani CP, Abramovitch K, Rice DD, Kattadiyil MT. Effect of image sharpening on radiographic image quality. J Prosthet Dent 2018; 120:927-933. [PMID: 30166247 DOI: 10.1016/j.prosdent.2018.03.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 03/12/2018] [Accepted: 03/13/2018] [Indexed: 12/01/2022]
Affiliation(s)
| | - Chandur P Wadhwani
- Adjunct Assistant Professor, Advanced Specialty Education Program in Prosthodontics, School of Dentistry, Loma Linda University, Loma Linda, Calif
| | - Kenneth Abramovitch
- Professor of Radiology and Imaging Sciences, School of Dentistry, Loma Linda University, Loma Linda, Calif; Professor of Radiology, School of Medicine, Loma Linda University, Loma Linda, Calif
| | - Dwight D Rice
- Associate Professor of Radiology and Imaging Sciences, School of Dentistry, Loma Linda University, Loma Linda, Calif
| | - Mathew T Kattadiyil
- Professor and Director, Advanced Specialty Education Program in Prosthodontics, School of Dentistry, Loma Linda University, Loma Linda, Calif
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15
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Francio LA, Silva FE, Valerio CS, Cardoso CAEA, Jansen WC, Manzi FR. Accuracy of various imaging methods for detecting misfit at the tooth-restoration interface in posterior teeth. Imaging Sci Dent 2018; 48:87-96. [PMID: 29963479 PMCID: PMC6015931 DOI: 10.5624/isd.2018.48.2.87] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 02/26/2018] [Accepted: 03/14/2018] [Indexed: 12/31/2022] Open
Abstract
Purpose The present study aimed to evaluate which of the following imaging methods best assessed misfit at the tooth-restoration interface: (1) bitewing radiographs, both conventional and digital, performed using a photostimulable phosphor plate (PSP) and a charge-coupled device (CCD) system; (2) panoramic radiographs, both conventional and digital; and (3) cone-beam computed tomography (CBCT). Materials and Methods Forty healthy human molars with class I cavities were selected and divided into 4 groups according to the restoration that was applied: composite resin, composite resin with liner material to simulate misfit, dental amalgam, and dental amalgam with liner material to simulate misfit. Radiography and tomography were performed using the various imaging methods, and the resulting images were analyzed by 2 calibrated radiologists. The true presence or absence of misfit corresponding to an area of radiolucency in regions subjacent to the esthetic and metal restorations was validated with microscopy. The data were analyzed using a receiver operating characteristic (ROC) curve, and the scores were compared using the Cohen kappa coefficient. Results For bitewing images, the digital systems (CCD and PSP) showed a higher area under the ROC curve (AUROC) for the evaluation of resin restorations, while the conventional images exhibited a larger AUROC for the evaluation of amalgam restorations. Conventional and digital panoramic radiographs did not yield good results for the evaluation of resin and amalgam restorations (P<.05). CBCT images exhibited good results for resin restorations (P>.05), but showed no discriminatory ability for amalgam restorations (P<.05). Conclusion Bitewing radiographs (conventional or digital) should be the method of choice when assessing dental restoration misfit.
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Affiliation(s)
| | | | - Claudia Scigliano Valerio
- Department of Oral Radiology, Pontifical Catholic University of Minas Gerais, Belo Horizonte, Brazil
| | | | | | - Flávio Ricardo Manzi
- Department of Oral Radiology, Pontifical Catholic University of Minas Gerais, Belo Horizonte, Brazil
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Buchanan A, Morales C, Looney S, Kalathingal S. Fish scale artefact on an intraoral imaging receptor. Dentomaxillofac Radiol 2017; 46:20170224. [PMID: 28749701 DOI: 10.1259/dmfr.20170224] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES To describe an artefact, termed the fish scale artefact, present on an intraoral imaging receptor. METHODS Thirty brand new DIGORA Optime photostimulable phosphor (PSP) plates (Soredex/Orion Corp., Helsinki, Finland) were imaged using the dental digital quality assurance radiographic phantom (Dental Imaging Consultants LLC, San Antonio, TX). All PSP plates were scanned at the same spatial resolution (dpi) using the high resolution mode. Two evaluators assessed all 30 plates. Each evaluator assessed the 30 PSP plates separately for purposes of establishing interrater reliability, and then together in order to obtain the gold standard result. RESULTS The fish scale artefact was detected on 46.7% of the PSP plates. The kappa coefficient for interrater reliability was 0.86 [95% CI (0.69-1.00)], indicating excellent interrater reliability. For Evaluator 1, sensitivity was 0.85 [95% CI (0.55-0.98)]; specificity was 0.94 [CI (0.71-1.00)] and overall accuracy was 0.90 [95% CI (0.73-0.98)]. For Evaluator 2, sensitivity was 1.00 [95% CI (0.75-1.00)]; specificity was 0.94 [CI (0.71-1.00)] and overall accuracy was 0.97 [95% CI (0.83-1.00)]. These results indicate excellent agreement with the gold standard for both evaluators. CONCLUSIONS Utilizing a comprehensive quality assurance protocol, we identified a fish scale artefact inherent to the image receptor. Additional research is needed to determine if the artefact remains static over time or if it increases over time. Likewise, research to determine the potential sources contributing to an increase in the artefact is needed.
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Affiliation(s)
- Allison Buchanan
- 1 Department of Oral Health and Diagnostic Sciences, Dental College of Georgia at Augusta University, Augusta, GA, USA
| | - Carla Morales
- 2 Dental College of Georgia at Augusta University, Augusta, GA, USA
| | - Stephen Looney
- 3 Department of Biostatistics and Epidemiology, Medical College of Georgia, Augusta, GA, USA
| | - Sajitha Kalathingal
- 1 Department of Oral Health and Diagnostic Sciences, Dental College of Georgia at Augusta University, Augusta, GA, USA
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Buchanan A, Benton B, Carraway A, Looney S, Kalathingal S. Perception versus reality—findings from a phosphor plate quality assurance study. Oral Surg Oral Med Oral Pathol Oral Radiol 2017; 123:496-501. [DOI: 10.1016/j.oooo.2016.12.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 11/11/2016] [Accepted: 12/12/2016] [Indexed: 10/20/2022]
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Mah P, Udupa H. Response to the article “Comparison of the performance of intraoral X-ray sensors using objective image quality assessment”. Oral Surg Oral Med Oral Pathol Oral Radiol 2016; 122:785-786. [DOI: 10.1016/j.oooo.2016.07.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 07/22/2016] [Indexed: 11/30/2022]
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Hellén-Halme K, Johansson C, Nilsson M. Comparison of the performance of intraoral X-ray sensors using objective image quality assessment. Oral Surg Oral Med Oral Pathol Oral Radiol 2016; 121:e129-37. [PMID: 27068317 DOI: 10.1016/j.oooo.2016.01.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 12/15/2015] [Accepted: 01/23/2016] [Indexed: 11/26/2022]
Abstract
OBJECTIVES The main aim of this study was to evaluate the performance of 10 individual sensors of the same make, using objective measures of key image quality parameters. A further aim was to compare 8 brands of sensors. STUDY DESIGN Ten new sensors of 8 different models from 6 manufacturers (i.e., 80 sensors) were included in the study. All sensors were exposed in a standardized way using an X-ray tube voltage of 60 kVp and different exposure times. Sensor response, noise, low-contrast resolution, spatial resolution and uniformity were measured. RESULTS Individual differences between sensors of the same brand were surprisingly large in some cases. There were clear differences in the characteristics of the different brands of sensors. The largest variations were found for individual sensor response for some of the brands studied. Also, noise level and low contrast resolution showed large variations between brands. CONCLUSIONS Sensors, even of the same brand, vary significantly in their quality. It is thus valuable to establish action levels for the acceptance of newly delivered sensors and to use objective image quality control for commissioning purposes and periodic checks to ensure high performance of individual digital sensors.
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Affiliation(s)
- Kristina Hellén-Halme
- Department of Oral and Maxillofacial Radiology, Faculty of Odontology, Malmö University, Malmö, Sweden.
| | - Curt Johansson
- Department of Oral and Maxillofacial Radiology, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Mats Nilsson
- Department of Oral and Maxillofacial Radiology, Faculty of Odontology, Malmö University, Malmö, Sweden; Department of Radiation Physics, Skåne University Hospital, Malmö, Sweden
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Abstract
This article provides the reader with the knowledge and skills of identification and diagnostic interpretative skills using planar images, tomographic images, CBCT, MDCT, pertinent MR images, as well as bone scans and PET images. The goal is to provide sufficient in-depth knowledge of the technique, anatomy, and radiographic identifiers for the diagnosis of local and systemic pathoses. The information will train the reader to be an advocate of selection criteria as well as a follower of the "Image Gently" campaign and philosophy supported by the organized dentistry in the United States, especially in Diagnostic Radiology.
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Affiliation(s)
- Mel Mupparapu
- Department of Oral Medicine, Robert Schattner Center, University of Pennsylvania School of Dental Medicine, 240 South 40th Street, Suite 214, Philadelphia, PA 19104, USA.
| | - Christine Nadeau
- Faculty of Dental Medicine, Université Laval, 2420, rue de la Terrasse, Québec, Québec G1V 0A6, Canada
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Nascimento HAR, Visconti MAPG, Ferreira LM, Suarez MA, Haiter Neto F, Freitas DQ. Effect of delayed scanning on imaging and on the diagnostic accuracy of vertical root fractures in two photostimulable phosphor plates digital systems. Int Endod J 2015; 49:973-9. [PMID: 26354080 DOI: 10.1111/iej.12547] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 09/05/2015] [Indexed: 11/29/2022]
Abstract
AIM To evaluate the influence of delayed scanning on images obtained with two PSPs digital systems and on the diagnostic accuracy of vertical root fracture (VRF) by means of objective and subjective analyses. METHODOLOGY Forty single-rooted human teeth were divided into two groups, one without VRFs and another with VRFs induced by a universal testing machine. Two digital systems (VistaScan(®) and Express(®) ) were used to radiograph all teeth, and the resulting plates were scanned at four time-points: T0-immediately, T1-30 min, T2-2 h and T3-4 h after exposure. An aluminium (Al) wedge was used to evaluate the change in mean grey values as each scan was delayed. Three observers screened all images for VRFs, and one-fourth of the sample was revaluated after thirty days. Areas under the receiver operating characteristic (ROC) curve, sensitivity, specificity and accuracy values were compared by anova. RESULTS Intra- and interobserver agreement ranged from moderate to substantial and fair to moderate, respectively. There was no significant difference amongst scan delays with regard to sensitivity, specificity and accuracy; however, there were significant differences in the area under the ROC curve, with the 4-h delayed scan being associated with lower values compared to the others (P = 0.019). As for objective analysis, there was a significant difference amongst all different scanning time-points for the two systems (P = 0.001), except between the 30-min and 2-h delayed scans in the VistaScan(®) system. CONCLUSION Whilst delayed scanning caused changes to the density of images acquired with the systems studied, it did not seem to interfere with VRF diagnosis except when scanning was delayed for 4 h, which should therefore be avoided.
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Affiliation(s)
- H A R Nascimento
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, São Paulo, Brazil.
| | - M A P G Visconti
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, São Paulo, Brazil
| | - L M Ferreira
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, São Paulo, Brazil
| | - M A Suarez
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, São Paulo, Brazil
| | - F Haiter Neto
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, São Paulo, Brazil
| | - D Q Freitas
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, São Paulo, Brazil
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Liedke GS, Spin-Neto R, Vizzotto MB, da Silveira PF, Wenzel A, da Silveira HED. Diagnostic accuracy of cone beam computed tomography sections with various thicknesses for detecting misfit between the tooth and restoration in metal-restored teeth. Oral Surg Oral Med Oral Pathol Oral Radiol 2015; 120:e131-7. [DOI: 10.1016/j.oooo.2015.05.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 03/11/2015] [Accepted: 05/06/2015] [Indexed: 12/11/2022]
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Shokri A, Eskandarloo A, Noruzi-Gangachin M, Khajeh S. Detection of root perforations using conventional and digital intraoral radiography, multidetector computed tomography and cone beam computed tomography. Restor Dent Endod 2015; 40:58-67. [PMID: 25671214 PMCID: PMC4320278 DOI: 10.5395/rde.2015.40.1.58] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 09/26/2014] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVES This study aimed to compare the accuracy of conventional intraoral (CI) radiography, photostimulable phosphor (PSP) radiography, cone beam computed tomography (CBCT) and multidetector computed tomography (MDCT) for detection of strip and root perforations in endodontically treated teeth. MATERIALS AND METHODS Mesial and distal roots of 72 recently extracted molar were endodontically prepared. Perforations were created in 0.2, 0.3, or 0.4 mm diameter around the furcation of 48 roots (strip perforation) and at the external surface of 48 roots (root perforation); 48 roots were not perforated (control group). After root obturation, intraoral radiography, CBCT and MDCT were taken. Discontinuity in the root structure was interpreted as perforation. Two observers examined the images. Data were analyzed using Stata software and Chi-square test. RESULTS The sensitivity and specificity of CI, PSP, CBCT and MDCT in detection of strip perforations were 81.25% and 93.75%, 85.42% and 91.67%, 97.92% and 85.42%, and 72.92% and 87.50%, respectively. For diagnosis of root perforation, the sensitivity and specificity were 87.50% and 93.75%, 89.58% and 91.67%, 97.92% and 85.42%, and 81.25% and 87.50%, respectively. For detection of strip perforation, the difference between CBCT and all other methods including CI, PSP and MDCT was significant (p < 0.05). For detection of root perforation, only the difference between CBCT and MDCT was significant, and for all the other methods no statistically significant difference was observed. CONCLUSIONS If it is not possible to diagnose the root perforations by periapical radiographs, CBCT is the best radiographic technique while MDCT is not recommended.
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Affiliation(s)
- Abbas Shokri
- Department of Oral and Maxillofacial Radiology, Hamadan University of Medical Sciences Dental School, Hamadan, Iran
| | - Amir Eskandarloo
- Department of Oral and Maxillofacial Radiology, Hamadan University of Medical Sciences Dental School, Hamadan, Iran
| | - Maruf Noruzi-Gangachin
- Department of Oral and Maxillofacial Radiology, Hamadan University of Medical Sciences Dental School, Hamadan, Iran
| | - Samira Khajeh
- Department of Oral and Maxillofacial Radiology, Kurdistan University of Medical Sciences Dental School, Sanandaj, Iran
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Cruz AD, Lobo IC, Lemos ALB, Aguiar MF. Evaluation of low-contrast perceptibility in dental restorative materials under the influence of ambient light conditions. Dentomaxillofac Radiol 2015; 44:20140360. [PMID: 25629721 DOI: 10.1259/dmfr.20140360] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
OBJECTIVES This study aimed to assess how details on dental restorative composites with different radio-opacities are perceived under the influence of ambient light. METHODS Resin composite step wedges (six steps, each 1-mm thick) were custom manufactured from three materials, respectively: (M1) Filtek™ Z350 (3M/ESPE, Saint Paul, MN); (M2) Prisma AP.H™ (Dentsply International Inc., Brazil) and (M3) Glacier(®) (SDI Limited, Victoria, Australia). Each step of the manufactured wedge received three standardized drillings of different diameters and depths. An aluminium (Al) step wedge with 12 steps (1-mm thick) was used as an internal standard to calculate the radio-opacity as pixel intensity values. Standardized digital images of the set were obtained, and 11 observers independently recorded the images, noting the number of noticeable details (drillings) under 2 dissimilar conditions: in a light environment (light was turned on in the room) and in low-light conditions (light in the room was turned off). The differences between images in terms of the number of details that were observed were statistically compared using ANOVA, Cronbach's alpha coefficient and Wilcoxon and Kruskal-Wallis tests, with a significance level setting of 5% (α = 0.05). RESULTS The M2 showed higher radio-opacity, the M1 displayed intermediate radio-opacity and the M3 showed lower radio-opacity, respectively; however, all three were without significance (p > 0.05) compared with each other. The differences in radio-opacity resulted in a significant variation (p < 0.05) in the number of noticeable details in the image, which were influenced by characteristics of details, in addition to the ambient-light level. CONCLUSIONS The radio-opacity of materials and ambient light can affect the perception of details in digital radiographic images.
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Affiliation(s)
- A D Cruz
- 1 Department of Specific Formation, Area of Dental Radiology, Dental School of the Fluminense Federal University, Rio de Janeiro, Brazil
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