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Santos CV, Correia VAG, Felizardo HMA, Esteves A, Rossi-Júnior WC, Pigossi SC, Gaêta-Araujo H. The effect of different spatial resolutions and enhancement filters on radiographic detection of simulated furcation defects with intraoral digital radiography. Oral Surg Oral Med Oral Pathol Oral Radiol 2023; 136:518-528. [PMID: 37407350 DOI: 10.1016/j.oooo.2023.05.014] [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: 02/16/2023] [Revised: 04/20/2023] [Accepted: 05/18/2023] [Indexed: 07/07/2023]
Abstract
OBJECTIVE The objective of this study was to evaluate the effects of spatial resolution and the application of enhancement filters in the diagnosis of simulated furcation defects and image quality with intraoral radiographs. STUDY DESIGN Periapical images were acquired with photostimulable phosphor plates of molars in dry skulls (n = 8) and mandibles (n = 10) with 4 stages of furcation defect simulation. The plates were scanned in fast scan and high resolution modes to produce different spatial resolutions. Four image filters were applied. Six observers scored the detection of furcation defects. Mean values of area under the curve in receiver operating characteristic evaluation, accuracy, sensitivity, and specificity were calculated. Mean gray value (brightness), noise, and contrast-to-noise ratio (CNR) were calculated for enamel, dentin, and alveolar bone to evaluate image quality. Analysis of variance compared the values between the different spatial resolutions and filters. The significance of difference was established at P < .05. RESULTS There were no significant differences in overall diagnostic values comparing image spatial resolutions and filters. Diagnostic outcomes were significantly better for the largest defects than the smallest lesions but were generally poor in detecting lesions. All structures showed greater brightness in high resolution. . Noise was greater in all structures with all enhancement filters except inversion. Dentin and alveolar bone exhibited more noise and lower CNR in high resolution. CONCLUSIONS Varying spatial resolution and applying enhancement filters did not significantly affect the diagnosis of furcation defects.
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Affiliation(s)
| | | | | | - Alessandra Esteves
- Department of Anatomy, Institute of Biomedical Sciences, Federal University of Alfenas, Alfenas, Minas Gerais, Brazil
| | - Wagner Costa Rossi-Júnior
- Department of Anatomy, Institute of Biomedical Sciences, Federal University of Alfenas, Alfenas, Minas Gerais, Brazil
| | - Suzane Cristina Pigossi
- Department of Periodontology and Implantodontology, School of Dentistry, Federal University of Uberlandia, Uberlandia, Minas Gerais, Brazil
| | - Hugo Gaêta-Araujo
- Department of Stomatology, Public Oral Health and Forensic Dentistry, School of Dentistry of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil.
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Miranda-Viana M, Fontenele RC, Nogueira-Reis F, Farias-Gomes A, Oliveira ML, Freitas DQ, Haiter-Neto F. DICOM file format has better radiographic image quality than other file formats: an objective study. Braz Dent J 2023; 34:150-157. [PMID: 37909638 PMCID: PMC10642272 DOI: 10.1590/0103-6440202305499] [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: 03/28/2023] [Accepted: 07/24/2023] [Indexed: 11/03/2023] Open
Abstract
This study aimed to assess the influence of the file format on the image quality parameters (image noise, brightness, and uniformity) of periapical radiographs acquired with different digital systems. Radiographic images of an acrylic phantom were acquired with two digital systems - Digora Toto and Express, and exported into five different file formats - TIFF, BMP, DICOM, PNG, and JPEG. Image noise, image brightness (mean of gray values), and image uniformity (standard deviation of gray values) were evaluated in all images. A two-way analysis of variance with Tukey's test as a post-hoc test was used to compare the results, considering the file formats and radiographic systems as the studied factors. A significance level of 5% was adopted for all analyses. The DICOM image file format presented lower image noise, higher brightness (higher mean gray values), and greater image uniformity (p<0.001) than the other file formats, which did not differ from each other for both digital radiography systems (p>0.05). The Express system revealed lower image noise and greater image uniformity than the Digora Toto system regardless of the image file format (p<0.001). Moreover, the Express showed higher brightness than the Digora Toto for all image file formats (p<0.001), except for the DICOM image file format, which did not significantly differ between the digital radiography systems tested (p>0.05). The DICOM image file format showed lower image noise, higher brightness, and greater image uniformity than the other file formats (TIFF, BMP, PNG, and JPEG) in both digital radiography systems tested.
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Affiliation(s)
- Murilo Miranda-Viana
- Department of Oral Diagnosis - Oral Radiology Area, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
| | - Rocharles Cavalcante Fontenele
- Department of Oral Diagnosis - Oral Radiology Area, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
| | - Fernanda Nogueira-Reis
- Department of Oral Diagnosis - Oral Radiology Area, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
| | - Amanda Farias-Gomes
- Oral Radiology Area, Dental School, Federal University of Mato Grosso do Sul, Campo Grande, MS, Brazil
| | - Matheus L Oliveira
- Department of Oral Diagnosis - Oral Radiology Area, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
| | - Deborah Queiroz Freitas
- Department of Oral Diagnosis - Oral Radiology Area, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
| | - Francisco Haiter-Neto
- Department of Oral Diagnosis - Oral Radiology Area, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
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Miranda-Viana M, Fontenele RC, Farias Gomes A, Nogueira-Reis F, Nejaim Y, Oliveira ML, Freitas DQ. Digital file format does not influence the radiographic diagnosis of vertical root fracture. Oral Radiol 2022; 38:452-458. [PMID: 34626307 PMCID: PMC8501329 DOI: 10.1007/s11282-021-00573-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 09/28/2021] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To evaluate the influence of the file format of digital periapical radiographs on the diagnosis of vertical root fracture (VRF). STUDY DESIGN Periapical radiographic images of 34 single-rooted teeth-19 with VRF, and 15 without VRF were acquired using two digital systems-Digora Toto, and Digora Optime, and exported into four different file formats-TIFF, BMP, PNG, and JPEG, totaling 272 radiographs. The radiographs were assessed by five examiners for the detection of VRF, using a 5-point scale (1-definitely absent; 2-probably absent; 3-uncertain; 4-probably present; 5-definitely present). Diagnostic values of area under the ROC curve, specificity, and sensitivity for the diagnosis of VRF were calculated. The results were compared by two-way Analysis of Variance with post hoc Tukey's test. The intra- and inter-examiner agreements were measured by the Kappa test. The significance level was set at 5% for all analyses. RESULTS The values of intra-examiner agreement varied from moderate (0.56) to almost perfect (0.81), while the values of inter-examiner agreement varied from fair (0.29) to moderate (0.60). The image file format did not influence the diagnostic values for VRF for any of the radiographic systems tested (p > 0.05). Digora Toto had significantly greater values of area under the ROC curve than Digora Optime for all file formats (p = 0.001). CONCLUSION The image file format of periapical radiographs does not influence the diagnosis of VRF, regardless of the digital radiography system.
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Affiliation(s)
- Murilo Miranda-Viana
- Oral Radiology Area, Piracicaba Dental School, University of Campinas, Avenida Limeira, 901, Piracicaba, São Paulo, 13414-903, Brazil
| | - Rocharles Cavalcante Fontenele
- Oral Radiology Area, Piracicaba Dental School, University of Campinas, Avenida Limeira, 901, Piracicaba, São Paulo, 13414-903, Brazil.
| | - Amanda Farias Gomes
- Oral Radiology Area, Piracicaba Dental School, University of Campinas, Avenida Limeira, 901, Piracicaba, São Paulo, 13414-903, Brazil
| | - Fernanda Nogueira-Reis
- Oral Radiology Area, Piracicaba Dental School, University of Campinas, Avenida Limeira, 901, Piracicaba, São Paulo, 13414-903, Brazil
| | - Yuri Nejaim
- Oral Radiology Area, Dental School, Federal University of Mato Grosso do Sul, Campo Grande, MS, Brazil
| | - Matheus L Oliveira
- Oral Radiology Area, Piracicaba Dental School, University of Campinas, Avenida Limeira, 901, Piracicaba, São Paulo, 13414-903, Brazil
| | - Deborah Queiroz Freitas
- Oral Radiology Area, Piracicaba Dental School, University of Campinas, Avenida Limeira, 901, Piracicaba, São Paulo, 13414-903, Brazil
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