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Rajalingam R, Brage K, Nielsen LK, Eriksen FB, Jørgensen HH, Mikkelsen AS, Schøler G, Mekiš N, Bruvo M, Precht H. Radiation dose and image quality in pediatric bitewing imaging. RADIATION PROTECTION DOSIMETRY 2025; 201:113-121. [PMID: 39679813 DOI: 10.1093/rpd/ncae227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2024] [Revised: 09/23/2024] [Accepted: 12/03/2024] [Indexed: 12/17/2024]
Abstract
INTRODUCTION Bitewing examinations are used to examine the pediatric dental status. The aim of this study was to compare the image quality and radiation dose between two different X-ray systems used for pediatric bitewing imaging. MATERIALS AND METHODS Data were obtained from both pediatric in vivo bitewing studies and phantom studies. Two X-ray systems were used: Trophy CCX digital (TCCX) (Trophy Irix 70, Marne-la-Vallee, France) and Planmeca Pro X (PPX) (Planmeca, Helsinki, Finland). An Unfors dosimeter (Unfors EDD-30, Billdal, Sweden) was used to measure the skin dose. Image quality was evaluated blindly by three experienced dentists using a Likert scale of 1-5 based on the visual representation of the anatomical structures with emphasis on caries. RESULTS The highest scoring in vivo bitewing images were obtained with TCCX, but the skin dose was 36% higher (mean 3029 ± 613 μGy) and 113% higher (mean 1364 ± 276 μGy) with standard settings than with compared to PPX. The evaluation of image quality revealed a higher median value for all ratings of TCCX compared to PPX for both the patient and phantom studies, meaning that the images of TCCX were rated as higher quality than the images from PPX. No correlation was found between the median score and the skin dose or between the median score and the exposure times. CONCLUSION A significant difference in radiation dose and image quality was found between TCCX and PPX in bitewing imaging. TCCX generally produced higher doses and better graded images, although all images were suitable for diagnosis.
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Affiliation(s)
- Raheis Rajalingam
- UCL University College, Education of Radiography, Niels Bohrs Allé 1, Odense M 5230, Denmark
| | - Karen Brage
- UCL University College, Education of Radiography, Niels Bohrs Allé 1, Odense M 5230, Denmark
- UCL University College, Health Sciences Research Centre, Niels Bohrs Allé 1, Odense M 5230, Denmark
| | - Louise Kjærby Nielsen
- UCL University College, Education of Radiography, Niels Bohrs Allé 1, Odense M 5230, Denmark
| | - Freja Bøgh Eriksen
- UCL University College, Education of Radiography, Niels Bohrs Allé 1, Odense M 5230, Denmark
| | - Helene Hviid Jørgensen
- UCL University College, Education of Radiography, Niels Bohrs Allé 1, Odense M 5230, Denmark
| | - Anne Sofie Mikkelsen
- Varde municipality, Department of Pediatric Dentistry, Lerpoetvej 50b, Varde 6800, Denmark
| | - Gitte Schøler
- Varde municipality, Department of Pediatric Dentistry, Lerpoetvej 50b, Varde 6800, Denmark
| | - Nejc Mekiš
- University of Ljubljana, Medical imaging and radiotherapy department, Zdravstvena pot 5, Ljubljana 100, Slovenia
| | - Maja Bruvo
- University College Absalon, Centre for Engineering and Science, Department of Radiography, Parkvej 190, Naestved 4700, Denmark
| | - Helle Precht
- UCL University College, Education of Radiography, Niels Bohrs Allé 1, Odense M 5230, Denmark
- UCL University College, Health Sciences Research Centre, Niels Bohrs Allé 1, Odense M 5230, Denmark
- Lillebelt Hospital, University Hospitals of Southern Denmark, Kolding, Radiology Department, Sygehusvej 1, Kolding 6000, Denmark
- University of Southern Denmark, Institute of Regional Health Research, Campusvej 55, Odense M 5230, Denmark
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Sampaio-Oliveira M, Marinho-Vieira LE, Haiter-Neto F, Freitas DQ, Oliveira ML. Ambient light exposure of photostimulable phosphor plates: is there a safe limit for acceptable image quality? Dentomaxillofac Radiol 2023; 52:20230174. [PMID: 37493608 PMCID: PMC10552132 DOI: 10.1259/dmfr.20230174] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 06/16/2023] [Accepted: 06/26/2023] [Indexed: 07/27/2023] Open
Abstract
OBJECTIVES To subjectively assess radiographs obtained with photostimulable phosphor (PSP) plates exposed to clinical levels of ambient light prior to read-out to potentially set a safe limit for acceptable image quality. METHODS AND MATERIALS Six dental regions of a dry human skull were X-rayed using PSP plates from VistaScan and Express under four exposure times: 0.1, 0.2, 0.32, and 0.4 s. Before read-out, the PSP plates were exposed to ambient light for 0, 5, 10, 30, 60, and 90 s. Six observers were asked to classify the 288 resulting radiographs as acceptable or unacceptable based on the identification of anatomical structures and global image quality. The number of answers classifying radiographs as unacceptable was used to calculate a rejection rate; a pairwise comparison for better image quality was further conducted among radiographs considered acceptable. Reproducibility was tested by having 25% of all experimental groups reassessed. RESULTS Intra- and interobserver agreement ranged from 0.87 to 1.00 and from 0.81 to 0.92, respectively. Exposure of PSP plates to ambient light increased rejection rates mostly as of 10 s. In the pairwise comparison, subtle differences were observed between radiographs obtained with PSP plates not exposed and those exposed to ambient light for 5 s. CONCLUSIONS Ambient light exposure of PSP plates impairs the image quality of radiographs. A safe limit of ambient light exposure of 5 s for VistaScan and Express should be considered. Ambient light exposure of PSP plates within safe limits can avoid retakes and reduce unnecessary 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), Piracicaba, São Paulo, Brazil
| | - Luiz Eduardo Marinho-Vieira
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - Francisco Haiter-Neto
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - Deborah Q. Freitas
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - Matheus L. Oliveira
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
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Imanishi Y, Sekiguchi T, Kato M, Kimoto H, Amemiya T, Dezawa K, Matsumoto K, Arai Y. Reduction of scratch or dirt artifacts on intraoral radiographs using dual imaging plates in image processing. Oral Radiol 2023; 39:386-393. [PMID: 36044160 DOI: 10.1007/s11282-022-00648-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 08/10/2022] [Indexed: 10/14/2022]
Abstract
OBJECTIVES Artifacts including scratches and dirt artifacts on the digital intraoral radiographs finally contribute to making inaccurate diagnoses. The aim of this study was to reduce the incidence of artifacts using dual imaging plates (DIPs) in imaging processing. METHODS Conventional X-rays were taken of a porcine mandible embedded in acrylic resin using a DIP which consists of a front IP (FIP) and a back IP (BIP) with some scratches and dirt. The two images of the FIP and BIP were then synthesized and averaged to obtain a conventional DIP image. The following image processing method was used to make a DIP with artifact reduction (DIP+AR) image. A subtraction image of the FIP and BIP was constructed and the standard deviation (SD) was calculated. If the pixel value was over 3SD on the subtraction images, the pixel value of the DIP was swapped with the value on the opposite side of the non-artifact pixel. The conventional and DIP+AR images were also subjectively evaluated. RESULTS Image processing to create a DIP+AR image was able to reduce the number of artifacts. Medians of number of artifacts evaluated were 2.00 [interquartile range (IQR), 2.50] in DIP images and 0.67 (IQR, 1.29) in DIP+AR images, indicating a significant reduction of number of artifacts in DIP+AR images. CONCLUSIONS DIP+AR image processing can reduce the incidence of artifacts caused by scratches and dirt, and could extend the lifespan of the IP and contribute accurate diagnosis in oral radiology.
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Affiliation(s)
- Yusuke Imanishi
- Department of Oral and Maxillofacial Radiology, Nihon University School of Dentistry, 1-8-13, surugadai kanda Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Takahito Sekiguchi
- Department of Oral and Maxillofacial Radiology, Nihon University School of Dentistry, 1-8-13, surugadai kanda Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Masao Kato
- Department of Oral and Maxillofacial Radiology, Nihon University School of Dentistry, 1-8-13, surugadai kanda Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Hideaki Kimoto
- Department of Oral and Maxillofacial Radiology, Nihon University School of Dentistry, 1-8-13, surugadai kanda Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Toshihiko Amemiya
- Department of Oral and Maxillofacial Radiology, Nihon University School of Dentistry, 1-8-13, surugadai kanda Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Ko Dezawa
- Department of Oral and Maxillofacial Radiology, Nihon University School of Dentistry, 1-8-13, surugadai kanda Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Kunihito Matsumoto
- Department of Oral and Maxillofacial Radiology, Nihon University School of Dentistry, 1-8-13, surugadai kanda Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Yoshinori Arai
- Department of Oral and Maxillofacial Radiology, Nihon University School of Dentistry, 1-8-13, surugadai kanda Chiyoda-ku, Tokyo, 101-8310, Japan.
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Tashiro M, Nakatani A, Sugiura K, Nakayama E. Analysis of image defects in digital intraoral radiography based on photostimulable phosphor plates. Oral Radiol 2023; 39:355-363. [PMID: 35948784 DOI: 10.1007/s11282-022-00645-8] [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: 05/24/2022] [Accepted: 07/17/2022] [Indexed: 11/24/2022]
Abstract
OBJECTIVES In digital intraoral radiography (DIR), images with defects caused by the digital process are sometimes produced. Hence, we analyzed DIR images with defects taken using the photostimulable phosphor (PSP) plate method and then classified these images based on the causes of the defect. The aim of this study was to classify defects in DIR using the PSP plate system, and to discuss the causes of each type of defect and the methods that can prevent their occurrence. METHODS Images with defects due to the two PSP plate systems (Arcana and Arcana Mira) were selected and classified according to the defect. Image defects caused by geometrical techniques that occur in both the film and PSP plate methods were excluded from this study. Moreover, changes in the rate of occurrence of images with defects over time were analyzed in this study. RESULTS The defects in images obtained by the PSP plate system were classified into six types, which were further divided into those caused by machine error or human error. Both types of error could influence the diagnostic performance. Machine error accidentally and rarely occurred; thus, the prevention of such errors is difficult. However, human error, especially errors caused by photo-induced discharge, could be prevented using appropriate measures. CONCLUSIONS In DIR systems using the PSP plate method, human error should be prevented by education and training to improve operation.
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Affiliation(s)
- Masayasu Tashiro
- Division of Oral and Maxillofacial Radiology, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, 1757, Ishikari-Tobetsu, Kanazawa, Hokkaido, 061-0293, Japan
| | - Atsutoshi Nakatani
- Division of Oral and Maxillofacial Radiology, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, 1757, Ishikari-Tobetsu, Kanazawa, Hokkaido, 061-0293, Japan
| | - Kazutaka Sugiura
- Division of Oral and Maxillofacial Radiology, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, 1757, Ishikari-Tobetsu, Kanazawa, Hokkaido, 061-0293, Japan
| | - Eiji Nakayama
- Division of Oral and Maxillofacial Radiology, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, 1757, Ishikari-Tobetsu, Kanazawa, Hokkaido, 061-0293, Japan.
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Sampaio-Oliveira M, Marinho-Vieira LE, Wanderley VA, Ambrosano GMB, Pauwels R, Oliveira ML. How Does Ambient Light Affect the Image Quality of Phosphor Plate Digital Radiography? A Quantitative Analysis Using Contemporary Digital Radiographic Systems. SENSORS (BASEL, SWITZERLAND) 2022; 22:8627. [PMID: 36433224 PMCID: PMC9695569 DOI: 10.3390/s22228627] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/24/2022] [Accepted: 11/07/2022] [Indexed: 06/16/2023]
Abstract
The aim of this study is to quantitatively evaluate the influence of the duration of ambient light exposure on the image quality of digital radiographs obtained with contemporary phosphor plate (PSP)-based systems. Radiographs of an aluminum step-wedge were obtained using VistaScan and Express systems at five X-ray exposure times: 0.10, 0.20, 0.32, 0.40, and 0.50 s; the resulting dose-area products were, respectively, 21.93, 43.87, 70.19, 87.75, and 109.6 mGycm2. Before PSP read-out, half of the sensitive surface of the PSP plates was exposed to ambient light for 5, 10, 30, 60, and 90 s. The effect of light exposure on brightness, contrast, contrast-to-noise ratio (CNR), signal-to-noise ratio (SNR), and image saturation was compared using ANOVA with the Tukey test (α = 0.05). Ambient light exposure increased brightness and contrast and reduced CNR and SNR in PSP-based radiographs of contemporary digital systems. At the longest X-ray exposure times, ambient light exposure reduced the dark saturation (mean gray values ≤ 1) observed in Express. In conclusion, the negative effects of ambient light observed on the image quality of PSP-based radiographs are directly proportional to the duration of exposure. Clinicians should be aware of such harmful effects when handling and scanning PSP plates in bright environments.
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Affiliation(s)
- Matheus Sampaio-Oliveira
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba 13414-903, Brazil
| | - Luiz Eduardo Marinho-Vieira
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba 13414-903, Brazil
| | - Victor Aquino Wanderley
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba 13414-903, Brazil
| | - Gláucia Maria Bovi Ambrosano
- Department of Community Dentistry, Division of Biostatistics, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba 13414-903, Brazil
| | - Ruben Pauwels
- Aarhus Institute of Advanced Studies, Aarhus University, 8000 Aarhus, Denmark
- Department of Radiology, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand
| | - Matheus L. Oliveira
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba 13414-903, Brazil
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Pamukcu U, Tetik H, Peker I, Karadag Atas O, Zafersoy Akarslan Z. Effect of enveloping and disinfection methods on artefact formation on enveloped PSP plate images. Oral Radiol 2022; 38:558-564. [PMID: 35064886 PMCID: PMC8783187 DOI: 10.1007/s11282-022-00587-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Accepted: 01/09/2022] [Indexed: 12/23/2022]
Abstract
Objectives To investigate the artefacts caused by different disinfection and protection methods that can be used for infection control of photostimulable phosphor (PSP) plates. Methods The plates that were enveloped with single or double envelopes were sprayed with an alcohol-containing solution or wiped with an alcohol-containing tissue. Four PSP groups with two plates in each group were formed (A = wiping single envelope, B = wiping double envelopes, C = spraying onto single envelope, and D = spraying onto double envelopes). Any artefacts (1 = no artefact, 2 = presence of artefact less than 0.5 cm wide, and 3 = presence of artefact larger than 0.5 cm wide) on the 12 acquired images were evaluated. Results Artefacts (score-3) occurred on the images of Group C-2 PSP plate after the 3rd exposure. According to the Kruskal–Wallis test the difference between the artefact score of the four methods was found significant. Post-hoc comparisons showed the Group C artefact scores were higher than the others and the difference was significant. The total time of enveloping and disinfection processes for groups was; A = 6.30 min, B = 7.58 min, C = 5.48 min, and D = 7.14 min. Conclusions Regardless of the number of envelopes, wiping with a tissue was less likely to cause artefacts, while spraying was reliable only when double envelopes were used. However, using a tissue and double envelopes, which are less risky in terms of artefact, causes time loss, difficulty in manipulation, environmental pollution and high cost.
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Affiliation(s)
- Umut Pamukcu
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Gazi University, 2. Sokak No: 4 Emek, Ankara, Turkey.
| | - Hatice Tetik
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Gazi University, 2. Sokak No: 4 Emek, Ankara, Turkey
| | - Ilkay Peker
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Gazi University, 2. Sokak No: 4 Emek, Ankara, Turkey
| | - Ozge Karadag Atas
- Department of Statistics, Faculty of Sciences, Hacettepe University, Ankara, Turkey
| | - Zuhre Zafersoy Akarslan
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Gazi University, 2. Sokak No: 4 Emek, Ankara, Turkey
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Elkhateeb SM, Aloyouny AY, Omer MMS, Mansour SM. Analysis of photostimulable phosphor image plate artifacts and their prevalence. World J Clin Cases 2022; 10:437-447. [PMID: 35097068 PMCID: PMC8771371 DOI: 10.12998/wjcc.v10.i2.437] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 10/25/2021] [Accepted: 12/10/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Digital radiography has recently been used in dentistry as a substitute for conventional film radiography worldwide. Digital imaging has many advantages and provides new possibilities for recording and interpreting radiographic data. This system uses different types of digital receptors.
AIM To detect the frequency, type, and reasons behind the appearance of intraoral image artifacts acquired by photostimulable phosphor plates (PSP).
METHODS This retrospective descriptive study was conducted in the oral and maxillofacial radiology unit of the dental clinics of the College of Dentistry, Princess Nourah University (PNU). All intraoral digital radiographs were acquired using (Gendex Expert DC., United States) an intraoral X-ray machine with 7 -mA, 65-kVP using a PSP system (Soredex DIGORA Optime imaging plate) and laser scanners (Soredex DIGORA Optime), which can house all sizes of reusable intraoral PSP sensor plates with image acquisition software (MIPACS Dental Enterprise viewer 3.2.2). A total of 50000 intraoral radiographs were retrieved from the clinical database from April 2018 to April 2020 to evaluate the reason, type, and solutions to these image artifacts.
RESULTS Overall, 50000 intraoral digital radiographs were acquired in a two-year-period; that is, from April 2018 to April 2020. Of these, 3550 (7.1%) retakes were performed due to the presence of image artifacts. Periapical radiographs were the most common image type of intraoral retakes (80.8%). Imaging artifacts were divided into three categories: operator, plate and scanning errors. Out of 3550 retakes, 5%, 1.37%, and 0.73% were related to operator, plate, and scanning errors, respectively. The cone cut was the most common operator error (988 images), Bite marks were the most common plate error (276 images), and delayed scanning artifacts were the most common scanning errors (145 images). The calculated kappa value for interobserver reliability was 0.99, indicating almost perfect interobserver agreement.
CONCLUSION Our study discussed intraoral image artifacts that were characteristic of PSP, where the most common artifacts were bitemarks, image size reduction, scratches, and delayed scanning.
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Affiliation(s)
- Sara Mohamed Elkhateeb
- Department of Basic Dental Science, College of Dentistry, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia
| | - Ashwag Yagoub Aloyouny
- Department of Basic Dental Science, College of Dentistry, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia
| | | | - Soad Mahmoud Mansour
- Department of Basic Dental Science, College of Dentistry, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia
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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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de Moura G, Vizzotto MB, Tiecher PFDS, Arús NA, da Silveira HLD. Benefits of using a photostimulable phosphor plate protective device. Dentomaxillofac Radiol 2021; 50:20200339. [PMID: 33411592 PMCID: PMC8404516 DOI: 10.1259/dmfr.20200339] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 12/02/2020] [Accepted: 12/18/2020] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES To develop and test a protective device (PD) to increase the resistance of photostimulable storage phosphor (PSP) plate to compressive load, and assess the resulting image quality. METHODS Two prototypes, polyvinylchloride sheets of 0.3 mm and 0.7 mm each, were developed for PSP plate size 2. The resistance to compressive load was tested using eight new PSPs divided into four test groups: (1) PSP, (2) PSP and paperboard protector, (3) PSP and 0.3 mm PD, and (4) PSP and 0.7 mm PD. The resulting images were analyzed by three oral radiologists, based on the consensus for image artifacts. Additionally, the objective image quality test was performed with four new PSPs, using an 8-step wedge aluminum scale. The mean gray values and standard deviation were measured in a total of 240 images, and the data were analyzed using analysis of variance with Bonferroni post-hoc test. RESULTS Artifacts were seen in the PSP control group starting at 40 n, and at 150 n, 175 n and 300 n in 0.3 mm PD, paperboard protector and 0.7 mm PD, respectively. Although there was no statistical difference among groups, there were differences between exposure times (0.06-0.25 s, 0.06-0.40 s, and 0.10-0.40 s). Scanning resolution of 20 lp/mm showed higher mean gray value than 25 and 40 lp/mm (p < 0.05). CONCLUSION The developed PDs improved the PSP resistance to compressive forces, with low interference on the pixel gray values, regardless of exposure time and spatial resolution. Nevertheless, the 0.7 mm PD could withstand the maximum compressive load.
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Affiliation(s)
- Graziela de Moura
- Department of Oral Surgery and Orthopedics, Division of Oral Radiology, Dental School, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Mariana Boessio Vizzotto
- Department of Oral Surgery and Orthopedics, Division of Oral Radiology, Dental School, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Priscila Fernanda da Silveira Tiecher
- Department of Oral Surgery and Orthopedics, Division of Oral Radiology, Dental School, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Nádia Assein Arús
- Department of Oral Surgery and Orthopedics, Division of Oral Radiology, Dental School, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Heraldo Luis Dias da Silveira
- Department of Oral Surgery and Orthopedics, Division of Oral Radiology, Dental School, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, 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: 0.2] [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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Deniz Y, Kaya S. Determination and classification of intraoral phosphor storage plate artifacts and errors. Imaging Sci Dent 2019; 49:219-228. [PMID: 31583205 PMCID: PMC6761057 DOI: 10.5624/isd.2019.49.3.219] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 05/06/2019] [Accepted: 05/22/2019] [Indexed: 01/28/2023] Open
Abstract
Purpose The aim of this study was to determine the reasons and solutions for intraoral phosphor storage plate (PSP) image artifacts and errors, and to develop an appropriate classification of the artifacts. Materials and Methods This study involved the retrospective examination of 5,000 intraoral images that had been obtained using a phosphor plate system. Image artifacts were examined on the radiographs and classified according to possible causative factors. Results Artifacts were observed in 1,822 of the 5,000 images. After examination of the images, the errors were divided into 6 groups based on their causes, as follows: images with operator errors, superposition of undesirable structures, ambient light errors, plate artifacts (physical deformations and contamination), scanner artifacts, and software artifacts. The groups were then re-examined and divided into 45 subheadings. Conclusion Identification of image artifacts can help to improve the quality of the radiographic image and control the radiation dose. Knowledge of the basic physics and technology of PSP systems could aid to reduce the need for repeated radiography.
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Affiliation(s)
- Yeşim Deniz
- Department of Dental and Maxillofacial Radiology, Faculty of Dentistry, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
| | - Seher Kaya
- Department of Restorative Dentistry, Faculty of Dentistry, Alanya Alaaddin Keykubat University, Antalya, Turkey
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Çalışkan A, Sumer AP. Definition, classification and retrospective analysis of photostimulable phosphor image artefacts and errors in intraoral dental radiography. Dentomaxillofac Radiol 2017; 46:20160188. [PMID: 27883287 DOI: 10.1259/dmfr.20160188] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
OBJECTIVES To detect and determine image error and artefact types in intraoral radiographs obtained with photostimulable phosphor (PSP) technology, place them in an appropriate classification and retrospectively analyze the PSP-specific image errors and artefacts. The causes and solutions of PSP-specific errors and artefacts have also been discussed. METHODS The radiographic database of Ondokuz Mayis University, Faculty of Dentistry, Department of Dentomaxillofacial Radiology, was used for this study. Different types of image errors and artefacts observed on intraoral radiographs during 2014-15 were detected and defined. A total of 2100 intraoral radiographs were individually evaluated for the distribution of PSP-specific image artefacts. RESULTS There were 34 image error and artefact types detected and classified into 4 groups according to the causative factors. The most common PSP-specific image artefacts were found in fading with a ratio of 44.1% for the ambient light-related group, peeling of the plate borders with a ratio of 53.4% for the PSP plate-related group and straight line with a ratio of 42.2% for the scanner-related group. CONCLUSIONS The determination and definition of the image errors and artefacts with clarification of their causes and solutions are important for the improvement of radiographic quality and the reduction of the retake ratio.
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Affiliation(s)
- Armağan Çalışkan
- 1 Department of Dentomaxillofacial Radiology, Oral and Dental Health Hospital, Samsun, Turkey
| | - A Pinar Sumer
- 2 Department of Dentomaxillofacial Radiology, Faculty of Dentistry; Ondokuz Mayis University, Samsun, Turkey
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