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Barros-Costa M, Nascimento EHL, Correia-Dantas IF, Oliveira ML, Freitas DQ. Potential impact of metal crowns at varying distances from a carious lesion on its detection on cone-beam computed tomography scans with several protocols. Imaging Sci Dent 2024; 54:49-56. [PMID: 38571773 PMCID: PMC10985521 DOI: 10.5624/isd.20230202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 12/07/2023] [Accepted: 12/09/2023] [Indexed: 04/05/2024] Open
Abstract
Purpose This study evaluated the impact of artifacts generated by metal crowns on the detection of proximal caries lesions in teeth at various distances using cone-beam computed tomography (CBCT). Additionally, the diagnostic impacts of tube current and metal artifact reduction (MAR) were investigated. Materials and Methods Thirty teeth were arranged within 10 phantoms, each containing 1 first premolar, 1 second premolar, and 1 second molar. A sound first molar (for the control group) or a tooth with a metal crown was placed. Of the 60 proximal surfaces evaluated, 15 were sound and 45 exhibited enamel caries. CBCT scans were acquired using an OP300 Maxio unit (Instrumentarium, Tuusula, Finland), while varying the tube current (4, 8, or 12.5 mA) and enabling or disabling MAR. Five observers assessed mesial and distal surfaces using a 5-point scale. Multi-way analysis of variance was employed for data comparison, with P<0.05 indicating statistical significance. Results The area under the curve (AUC) varied from 0.40 to 0.60 (sensitivity: 0.28-0.45, specificity: 0.44-0.80). The diagnostic accuracy was not significantly affected by the presence of a metal crown, milliamperage, or MAR (P>0.05). However, the overall AUC and specificity were significantly lower for surfaces near a crown (P<0.05). Conclusion CBCT-based caries detection was not influenced by the presence of a metal crown, variations in milliamperage, or MAR activation. However, the diagnostic accuracy was low and was further diminished for surfaces near a crown. Consequently, CBCT is not recommended for the detection of incipient caries lesions.
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Affiliation(s)
- Matheus Barros-Costa
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | | | - Iago Filipe Correia-Dantas
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Matheus L. Oliveira
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Deborah Queiroz Freitas
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
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Sampaio-Oliveira M, Marinho-Vieira LE, Barros-Costa M, Oliveira ML. Can Digital Enhancement Restore the Image Quality of Phosphor Plate-Based Radiographs Partially Damaged by Ambient Light? JOURNAL OF IMAGING INFORMATICS IN MEDICINE 2024; 37:145-150. [PMID: 38343236 DOI: 10.1007/s10278-023-00922-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 09/05/2023] [Accepted: 09/06/2023] [Indexed: 03/02/2024]
Abstract
To assess the effect of digital enhancement on the image quality of radiographs obtained with photostimulable phosphor (PSP) plates partially damaged by ambient light. Radiographs of an aluminum step wedge were obtained using the VistaScan and Express systems. Half of the PSP plates was exposed to ambient light for 0, 10, 30, 60, or 90 s before being scanned. The resulting radiographs were exported with and without digital enhancement. Metrics for brightness, contrast, and contrast-to-noise ratio (CNR) were derived, and the ratio of each metric between the exposed-to-light and non-exposed-to-light halves of the radiographs was calculated. The resulting ratios of the radiographs with digital enhancement were subtracted from those without digital enhancement and compared among each other. For the VistaScan system, digital enhancement partially restored brightness, contrast, and CNR. For the Express system, digital enhancement only restored CNR and not the impact of ambient light on brightness and contrast. Specifically, digital enhancement restored 23.48% of brightness for the VistaScan, while percentages below 1% were observed for the Express. Digital enhancement restored 53.25% of image contrast for the VistaScan and 5.79% for the Express; 40.71% of CNR was restored for the VistaScan, and 35% for the Express. Digital enhancement can partially restore the damage caused by ambient light on the brightness and contrast of PSP-based radiographs obtained with the VistaScan, as well as on CNR for the VistaScan and Express systems. The exposure of PSP plates to light can lead to unnecessary retakes and increased patient exposure to X-rays.
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Affiliation(s)
- Matheus Sampaio-Oliveira
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Av. Limeira, 901, Piracicaba-SP, 13414-903, Brazil.
| | - Luiz Eduardo Marinho-Vieira
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Av. Limeira, 901, Piracicaba-SP, 13414-903, Brazil
| | - Matheus Barros-Costa
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Av. Limeira, 901, Piracicaba-SP, 13414-903, Brazil
| | - Matheus L Oliveira
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Av. Limeira, 901, Piracicaba-SP, 13414-903, Brazil
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Ribeiro PFA, Hashizume LN, Arriola-Guillén LE, Madeira K, Vizzotto MB, da Silveira HLD. The interference of digital radiographic image acquisition and processing protocols in the diagnosis of incipient enamel carious lesions. J Clin Exp Dent 2024; 16:e96-e103. [PMID: 38496805 PMCID: PMC10943686 DOI: 10.4317/jced.60990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 12/18/2023] [Indexed: 03/19/2024] Open
Abstract
Background This study aims to evaluate the diagnosis of proximal carious lesions through different parameters of execution and visualization of the images. Material and Methods Proximal carious lesions were artificially induced in human teeth three different times (10, 20, and 30 hours) by in vitro demineralization. The teeth were radiographed with the Dürr digital system using three exposure times (0.10, 0.16, and 0.20s) and three different resolutions in the scanning of the phosphor plates (20-, 25- and 40-line pairs). After acquiring the images, they were submitted to VistaScan Fine, Caries 1, and Caries 2 software filters. Three radiologists analyzed the images in JPEG format. Results The Pearson's chi-square test showed an association between longer demineralization time and the presence of injury according to the professional's classification. There was no statistically significant association among the other parameters, exposure time, resolution, and use of filters and the presence of a lesion. All parameters showed a greater sensitivity than specificity. The exposure time of 0.2s showed better accuracy, the resolutions 25 and 40lp showed equal results and better than 20lp and the Fine filter obtained better values than the Caries 1 and 2 filters. Conclusions Despite the variation of parameters, exposure time, resolution, and use of filters, there were no statistically significant differences. For better diagnostic accuracy, it is recommended to use 0.2s of exposure time and a Fine filter, and scan the phosphor plates with 25lp. Key words:Orbital fracture, Etiology, Orbital trauma, Road traffic accidents, Trauma.
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Affiliation(s)
| | - Lina-Naomi Hashizume
- DDS, MS, PhD. Associate Professor of the Division of Caries and Microbiology, Dental School, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Luis-Ernesto Arriola-Guillén
- Ph.D. and Associate Professor of the Division of Orthodontics and Division of Oral and Maxillofacial Radiology, School of Dentistry, Universidad Científica del Sur, Lima, Perú
| | - Kristian Madeira
- Ph.D. and Professor of the Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Criciúma, Santa Catarina, Brazil
| | - Mariana-Boessio Vizzotto
- DDS, MS, PhD. Associate Professor of the Department of Oral Surgery and Orthopedics, Division of Dental Radiology, Dental School, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Heraldo-Luís-Dias da Silveira
- DDS, MS, PhD. Associate Professor of the Department of Oral Surgery and Orthopedics, Division of Dental Radiology, Dental School, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande 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-part 2: a subjective assessment. Dentomaxillofac Radiol 2023; 52:20220370. [PMID: 36988093 PMCID: PMC10170171 DOI: 10.1259/dmfr.20220370] [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: 11/07/2022] [Revised: 02/17/2023] [Accepted: 02/19/2023] [Indexed: 03/30/2023] Open
Abstract
OBJECTIVE To assess the subjective image quality of original and manually enhanced radiographs acquired at different X-ray exposure times and using different digital systems. METHODS A total of 500 radiographs obtained under 10 exposure times, 5 digital systems, and 2 enhancement conditions were assessed by 5 observers, who were asked to categorize each radiograph into acceptable or unacceptable. A radiograph was considered to be acceptable when at least four out of five observers found it acceptable. Descriptive analysis was used to summarize the outcomes and compare the subjective image quality of original and manually enhanced digital radiographs among different X-ray exposure times and digital systems. RESULTS Express had six exposure times producing acceptable original images within a range from 0.063 to 0.4 s, followed by Digora Toto, which had five within a range from 0.063 to 0.32 s, Digora Optime, which had four within a range from 0.063 to 0.2 s,and SnapShot and VistaScan, which had 2 (0.2 and 0.32 s) and 1 (0.63 s), respectively. Image enhancement turned unacceptable images into acceptable ones in four digital systems: SnapShot at three exposure times, Digora Toto at two exposure times, Express at one exposure time, and VistaScan at four exposure times. CONCLUSION Image enhancement based on brightness and/or contrast adjustments may be necessary to reveal the useful dynamic range of some digital radiographic systems and PSP-based systems may not necessarily have a wider range than sensor-based systems.
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Affiliation(s)
- Luiz Eduardo Marinho-Vieira
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba-SP, Brazil
| | - Luciano Augusto Cano Martins
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba-SP, Brazil
| | - Deborah Queiroz Freitas
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba-SP, Brazil
| | - Francisco Haiter-Neto
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba-SP, Brazil
| | - Matheus L. Oliveira
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba-SP, Brazil
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Gaêta-Araujo H, Oliveira-Santos N, de Oliveira Reis L, Nascimento EHL, Oliveira-Santos C. Automatic exposure compensation of digital radiographic technologies does not affect alveolar bone-level measurement. Oral Radiol 2023; 39:53-58. [PMID: 35218461 DOI: 10.1007/s11282-022-00599-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 02/17/2022] [Indexed: 01/07/2023]
Abstract
OBJECTIVE To evaluate whether the automatic exposure compensation in the presence of high-density materials can affect the measurement of alveolar bone level. METHODS Thirty regions of seven dry skulls and six mandibles were radiographed with and without a high-density material, using two digital radiographic technologies: photostimulable phosphor plate (PSP, Digora Optime) and sensor (CMOS, Digora Toto), totaling 120 images. The distances from the cement-enamel junction to the alveolar bone crest were measured using cone-beam computed tomography (CBCT) images to represent the reference standard. The same measurements of alveolar bone level and the average of the pixel values of the image were evaluated on the radiographs. Paired t test compared the average pixel values and alveolar bone-level measurements between images with and without high-density material. One-way analysis of variance compared the difference between radiographic and CBCT measurements (α = 0.05). RESULTS The high-density material reduced the pixel values in PSP (p = 0.002) and CMOS (p < 0.001) technologies, demonstrating the AEC functioning in both technologies. There was no difference in bone-level measurements between the images without and with the high-density material for both technologies (p ≥ 0.091), or between the tomographic and radiographic measurements (p ≥ 0.319). CONCLUSION In the presence of high-density material, the automatic exposure compensation reduces the average pixel values of the images (i.e., images get darker), but does not influence the radiographic measurements of alveolar bone level.
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Affiliation(s)
- Hugo Gaêta-Araujo
- Oral Radiology Section, School of Dentistry, Federal University of Alfenas (UNIFAL-MG), Rua Gabriel Monteiro da Silva, 700, Alfenas, MG, 37130-000, Brazil.
| | - Nicolly Oliveira-Santos
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, SP, Brazil
| | - Larissa de Oliveira Reis
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, SP, Brazil.,Department of Dentistry, Federal University of Juiz de Fora (UFJF-GV), Governador Valadares, MG, Brazil
| | | | - Christiano Oliveira-Santos
- Department of Diagnosis and Oral Health, University of Louisville School of Dentistry, Louisville, KY, USA
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Yavuz Y, Akleyin E, Akdağ MZ, Çolak M, Doğan MS, Kotanlı S. Clinical and radiological findings, SEM analysis and evaluation of caries risk in ectodermal dysplasia cases. BIOTECHNOL BIOTEC EQ 2022. [DOI: 10.1080/13102818.2022.2061374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
- Yasemin Yavuz
- Department of Restorative Dentistry, Faculty of Dentistry, Harran University, Sanlıurfa, Turkey
| | - Ebru Akleyin
- Department of Pediatric Dentistry, Faculty of Dentistry, Dicle University, Diyarbakır, Turkey
| | - Mehmet Zülküf Akdağ
- Department of Biophysics, Faculty of Medicine, Dicle University, Diyarbakır, Turkey
| | - Mehmet Çolak
- Department of Chemistry, Faculty of Science, Dicle University, Diyarbakır, Turkey
| | - Mehmet Sinan Doğan
- Department of Pediatric Dentistry, Faculty of Dentistry, Harran University, Sanlıurfa, Turkey
| | - Sedef Kotanlı
- Department of Maxillo Facial Radiology, Faculty of Dentistry, Harran University, Sanlıurfa, Turkey
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Maciel ERC, Nascimento EHL, Gaêta-Araujo H, Pontual MLDA, Pontual ADA, Ramos-Perez FMM. Automatic exposure compensation in intraoral digital radiography: effect on the gray values of dental tissues. BMC Med Imaging 2022; 22:4. [PMID: 34983424 PMCID: PMC8728919 DOI: 10.1186/s12880-021-00733-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 12/28/2021] [Indexed: 01/29/2023] Open
Abstract
Background This study aimed to investigate the effect of automatic exposure compensation (AEC)
of intraoral radiographic systems on the gray values of dental tissues in images acquired with or without high-density material in the exposed region using different exposure times and kilovoltages. The influence of the distance of the high-density material was also investigated. Methods Radiographs from the molar region of two mandibles were obtained using the RVG 6100 and the Express systems, operating at 60 and 70 kV and 0.06, 0.10, and 0.16 s. Subsequently, a titanium implant was inserted in the premolar’s socket and other images were acquired. Using the ImageJ software, two regions of interest were determined on the enamel, coronary dentine, root dentine, and pulp of the first and second molars to obtain their gray values. Results In the RVG 6100, the implant did not affect the gray values (p > 0.05); the increase in kV decreased it in all tissues (p < 0.05), and the exposure time affected only the root dentine and pulp. In the Express, only enamel and coronary dentine values changed (p < 0.05), decreasing with the implant presence and/or with the increase in exposure factors. The distance of the implant did not affect the results (p > 0.05). Conclusions AEC’s performance varies between the radiographic systems. Its effect on the gray values depends not only on the presence or absence of high-density material but also on the kV and exposure time used.
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Affiliation(s)
- Evelyn Rute Carneiro Maciel
- Department of Clinical and Preventive Dentistry, Federal University of Pernambuco (UFPE), Av. Prof. Artur de Sá, 329-481, Recife, Pernambuco, 52171-011, Brazil
| | - Eduarda Helena Leandro Nascimento
- Division of Oral Radiology, Department of Dentistry, Odontomed Imagem - Medical and Dental Services, Av. Dois Rios, 632, Ibura, Recife, Pernambuco, 51.230-000, Brazil.
| | - Hugo Gaêta-Araujo
- Oral Radiology Area, School of Dentistry, Federal University of Alfenas (UNIFAL-MG), R. Gabriel Monteiro da Silva, 700, Alfenas, Minas Gerais, 37130-001, Brazil
| | - Maria Luiza Dos Anjos Pontual
- Department of Clinical and Preventive Dentistry, Federal University of Pernambuco (UFPE), Av. Prof. Artur de Sá, 329-481, Recife, Pernambuco, 52171-011, Brazil
| | - Andrea Dos Anjos Pontual
- Department of Clinical and Preventive Dentistry, Federal University of Pernambuco (UFPE), Av. Prof. Artur de Sá, 329-481, Recife, Pernambuco, 52171-011, Brazil
| | - Flávia Maria Moraes Ramos-Perez
- Department of Clinical and Preventive Dentistry, Federal University of Pernambuco (UFPE), Av. Prof. Artur de Sá, 329-481, Recife, Pernambuco, 52171-011, 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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Radiographic diagnosis of proximal caries is not affected by exposure protocols and presence of high-density material on systems with automatic exposure compensation. Oral Radiol 2021; 38:356-362. [PMID: 34529235 DOI: 10.1007/s11282-021-00565-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Accepted: 09/06/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVES To investigate the performance of radiographic systems with automatic exposure compensation (AEC) on the caries diagnosis in images acquired with different exposure parameters and in the presence of high-density material. Also, the image quality was assessed. METHODS Forty posterior teeth (80 proximal surfaces) were radiographed using a phosphor plate and a CMOS system. Images were acquired with different exposure times (0.06, 0.10 and 0.16 s) and kilovoltages (60 and 70kVp), in the absence and presence of high-density material in the X-rayed region (control and high-density groups). Five radiologists assessed the caries using a 5-point scale. Diagnostic values were compared using two-way ANOVA. RESULTS For both radiographic systems, there were no significant differences in the area under the ROC curve (0.60-0.73), sensitivity (0.79-0.87) and specificity (0.29-0.48) between the control and high-density groups, exposure times or kilovoltages (p > 0.05). For image quality, scores assigned to the control and high-density groups were similar in each exposure protocol in both systems. CONCLUSIONS The presence of high-density material, exposure time and kilovoltage did not affect the caries diagnosis in any of the systems tested. It is recommended to use protocols with lower doses to reduce the patient's exposure.
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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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Does dose optimisation in digital panoramic radiography affect diagnostic performance? Clin Oral Investig 2020; 25:637-643. [PMID: 32845471 DOI: 10.1007/s00784-020-03535-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 08/17/2020] [Indexed: 10/23/2022]
Abstract
OBJECTIVES To compare the overall diagnostic performance of digital panoramic radiographs obtained with low-dose protocols and to estimate the absorbed dose in the head and neck. MATERIALS AND METHODS Forty-eight panoramic radiographs were obtained from eight imaging phantoms using six exposure protocols of progressively lower tube voltages (kVp) and currents (mA), as follows: (1) 70 kVp and 12.5 mA, (2) 66 kVp and 10 mA, (3) 66 kVp and 8 mA, (4) 66 kVp and 5 mA, (5) 66 kVp and 4 mA and (6) 66 kVp and 3.2 mA. Five oral radiologists independently evaluated the images and reported all detectable radiographic findings. Intra-examiner reproducibility was assessed by re-evaluation of 25% of the images. The data were analysed using the McNemar and weighted Kappa tests. Absorbed doses of the six protocols were obtained from thermoluminescent dosimeters placed inside a Rando phantom and compared using one-way ANOVA with post hoc Tukey (α = 0.05). RESULTS The overall diagnostic performance of panoramic radiographs obtained with low-dose protocols did not differ from that of panoramic radiographs obtained with the highest dose (p > 0.05). Moreover, substantial agreement was observed between all protocols. Protocol 1 resulted in the highest absorbed dose and protocols 4, 5 and 6 in the lowest absorbed doses, with the difference being significant (p ≤ 0.05). CONCLUSION Although digital panoramic radiography is considered a relatively low-dose examination, the radiation dose can be further reduced without negatively affecting its overall diagnostic performance. CLINICAL RELEVANCE Considering the risks associated with X-rays, digital panoramic radiographs can be obtained at even lower exposure levels.
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GalvÃo NS, Nascimento EHL, GaÊta-Araujo H, Freitas DQ, Haiter-Neto F, Oliveira ML. Automatic exposure compensation and subjective image enhancement in the radiographic diagnosis of caries. Braz Oral Res 2020; 34:e082. [PMID: 32785477 DOI: 10.1590/1807-3107bor-2020.vol34.0082] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 04/23/2020] [Indexed: 11/22/2022] Open
Abstract
This study aims to assess the influence of high-density material on the radiographic diagnosis of proximal caries in digital systems with automatic exposure compensation, and to evaluate the effect of subjective adjustment of brightness and contrast to undertake this diagnostic task. Twenty bitewing radiographs of forty posterior human teeth with non-cavitated carious lesions, confirmed by micro-CT, were obtained with two digital systems. A porcelain-fused-to-metal crown attached to a titanium implant was inserted into the exposed area, and all the radiographs were repeated. Five radiologists assessed the radiographs and diagnosed proximal carious lesions. Afterwards, the observers were asked to adjust image brightness and contrast, based on their subjective perception, and to reassess the images. Thirty percent of each experimental group was reassessed to test intraobserver reproducibility, totaling 208 images per observer. Intraobserver and interobserver agreements ranged from fair to substantial. Sensitivity, specificity, predictive values, and area under the ROC curve were calculated and compared for each radiographic system, using ANOVA (α = 0.05). Overall, presence of high-density material and adjustment of brightness and contrast did not significantly influence the radiographic diagnosis of proximal caries (p ≥ 0.05). Regarding Digora Optime, adjustment of brightness and contrast significantly increased (p < 0.05) the diagnostic accuracy of proximal carious lesions in the presence of high-density material. In conclusion, the presence of high-density material in the X-rayed region does not influence radiographic diagnosis of proximal caries. However, when it is present in the X-rayed area, subjective adjustment of brightness and contrast is recommended for use with the Digora Optime digital system.
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Affiliation(s)
- Neiandro Santos GalvÃo
- Department of Oral Diagnosis, Piracicaba Dental School, Universidade Estadual de Campinas, Piracicaba, SP, Brazil
| | | | - Hugo GaÊta-Araujo
- Department of Oral Diagnosis, Piracicaba Dental School, Universidade Estadual de Campinas, Piracicaba, SP, Brazil
| | - Deborah Queiroz Freitas
- Department of Oral Diagnosis, Piracicaba Dental School, Universidade Estadual de Campinas, Piracicaba, SP, Brazil
| | - Francisco Haiter-Neto
- Department of Oral Diagnosis, Piracicaba Dental School, Universidade Estadual de Campinas, Piracicaba, SP, Brazil
| | - Matheus Lima Oliveira
- Department of Oral Diagnosis, Piracicaba Dental School, Universidade Estadual de Campinas, Piracicaba, SP, Brazil
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