Effect of Spatial Position in the Field of View on Dimensional Changes in Cone Beam Computed Tomography
Objectives: This study aimed to assess the relation between dimensional changes and object location in the field of view (FOV) using cone beam computed tomography (CBCT). Materials and Methods: A custom-made phantom was fabricated from base plate wax. To analyze the accuracy of measurements in hori...
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| Format: | Article |
| Language: | English |
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Tehran University of Medical Sciences
2017-12-01
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| Series: | Frontiers in Dentistry |
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| Online Access: | https://jdt.tums.ac.ir/index.php/jdt/article/view/1965 |
| _version_ | 1818144985279627264 |
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| author | Mehrdad Panjnoush Yasaman Kheirandish Negar Zeini |
| author_facet | Mehrdad Panjnoush Yasaman Kheirandish Negar Zeini |
| author_sort | Mehrdad Panjnoush |
| collection | DOAJ |
| description | Objectives: This study aimed to assess the relation between dimensional changes and object location in the field of view (FOV) using cone beam computed tomography (CBCT).
Materials and Methods: A custom-made phantom was fabricated from base plate wax. To analyze the accuracy of measurements in horizontal and longitudinal dimensions, aluminum squares (0.5 mm thickness, 10×10 mm dimensions) were constructed and placed in three levels (upper, middle, and lower) and five positions (central, right, left, anterior and posterior). This phantom was scanned using Asahi, Planmeca and NewTom CBCT systems. CBCT scans were measured three times by use of their corresponding software. Statistical analysis was performed using one-way ANOVA, post-hoc test and two-way ANOVA (P<0.05).
Results: The differences between the mean horizontal dimensions of different systems were not significant (P=0.296). However, the differences between the mean longitudinal dimensions of different systems were significant (P=0.039). The differences between the different positions and the mean horizontal and longitudinal dimensions were significant (P<0.001, and P<0.001, respectively). The differences between the mean horizontal dimensions and different levels were not significant (P=0.51), but the differences between the mean longitudinal dimensions and different levels were significant (P<0.001). The interaction effect of level and position on the accuracy of horizontal and longitudinal measurements was significant (P<0.0001).
Conclusions: We found statistically significant differences in most of our comparisons; however, these differences were not clinically significant. Therefore, CBCT could be an accurate device for measurement of dimensions of objects placed in different positions in the FOV. |
| first_indexed | 2024-12-11T11:56:15Z |
| format | Article |
| id | doaj.art-4e01086723b44281b8f367d5da12171f |
| institution | Directory Open Access Journal |
| issn | 2676-296X |
| language | English |
| last_indexed | 2024-12-11T11:56:15Z |
| publishDate | 2017-12-01 |
| publisher | Tehran University of Medical Sciences |
| record_format | Article |
| series | Frontiers in Dentistry |
| spelling | doaj.art-4e01086723b44281b8f367d5da12171f2022-12-22T01:08:11ZengTehran University of Medical SciencesFrontiers in Dentistry2676-296X2017-12-01145937Effect of Spatial Position in the Field of View on Dimensional Changes in Cone Beam Computed TomographyMehrdad Panjnoush0Yasaman Kheirandish1Negar Zeini2Associate Professor, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Department of Oral and Maxillofacial Radiology, School of Dentistry, Tehran University of Medical Sciences, Tehran, IranAssistant Professor, Department of Oral and Maxillofacial Radiology, School of Dentistry, Tehran University of Medical Sciences, Tehran, IranPostgraduate Student, Department of Oral and Maxillofacial Radiology, School of Dentistry, Tehran University of Medical Sciences, Tehran, IranObjectives: This study aimed to assess the relation between dimensional changes and object location in the field of view (FOV) using cone beam computed tomography (CBCT). Materials and Methods: A custom-made phantom was fabricated from base plate wax. To analyze the accuracy of measurements in horizontal and longitudinal dimensions, aluminum squares (0.5 mm thickness, 10×10 mm dimensions) were constructed and placed in three levels (upper, middle, and lower) and five positions (central, right, left, anterior and posterior). This phantom was scanned using Asahi, Planmeca and NewTom CBCT systems. CBCT scans were measured three times by use of their corresponding software. Statistical analysis was performed using one-way ANOVA, post-hoc test and two-way ANOVA (P<0.05). Results: The differences between the mean horizontal dimensions of different systems were not significant (P=0.296). However, the differences between the mean longitudinal dimensions of different systems were significant (P=0.039). The differences between the different positions and the mean horizontal and longitudinal dimensions were significant (P<0.001, and P<0.001, respectively). The differences between the mean horizontal dimensions and different levels were not significant (P=0.51), but the differences between the mean longitudinal dimensions and different levels were significant (P<0.001). The interaction effect of level and position on the accuracy of horizontal and longitudinal measurements was significant (P<0.0001). Conclusions: We found statistically significant differences in most of our comparisons; however, these differences were not clinically significant. Therefore, CBCT could be an accurate device for measurement of dimensions of objects placed in different positions in the FOV.https://jdt.tums.ac.ir/index.php/jdt/article/view/1965Cone-Beam Computed TomographyDimensional Measurement AccuracyOrientationSpatial |
| spellingShingle | Mehrdad Panjnoush Yasaman Kheirandish Negar Zeini Effect of Spatial Position in the Field of View on Dimensional Changes in Cone Beam Computed Tomography Frontiers in Dentistry Cone-Beam Computed Tomography Dimensional Measurement Accuracy Orientation Spatial |
| title | Effect of Spatial Position in the Field of View on Dimensional Changes in Cone Beam Computed Tomography |
| title_full | Effect of Spatial Position in the Field of View on Dimensional Changes in Cone Beam Computed Tomography |
| title_fullStr | Effect of Spatial Position in the Field of View on Dimensional Changes in Cone Beam Computed Tomography |
| title_full_unstemmed | Effect of Spatial Position in the Field of View on Dimensional Changes in Cone Beam Computed Tomography |
| title_short | Effect of Spatial Position in the Field of View on Dimensional Changes in Cone Beam Computed Tomography |
| title_sort | effect of spatial position in the field of view on dimensional changes in cone beam computed tomography |
| topic | Cone-Beam Computed Tomography Dimensional Measurement Accuracy Orientation Spatial |
| url | https://jdt.tums.ac.ir/index.php/jdt/article/view/1965 |
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