The Influence of Slice Thickness, Sharpness, and Contrast Adjustments on Inferior Alveolar Canal Segmentation on Cone-Beam Computed Tomography Scans: A Retrospective Study
This retrospective study aims to investigate the impact of cone-beam computed tomography (CBCT) viewing parameters such as contrast, slice thickness, and sharpness on the identification of the inferior alveolar nerve (IAC). A total of 25 CBCT scans, resulting in 50 IACs, were assessed by two investi...
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| Format: | Article |
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MDPI AG
2023-10-01
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| Series: | Journal of Personalized Medicine |
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| Online Access: | https://www.mdpi.com/2075-4426/13/10/1518 |
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| author | Julien Issa Abanoub Riad Raphael Olszewski Marta Dyszkiewicz-Konwińska |
| author_facet | Julien Issa Abanoub Riad Raphael Olszewski Marta Dyszkiewicz-Konwińska |
| author_sort | Julien Issa |
| collection | DOAJ |
| description | This retrospective study aims to investigate the impact of cone-beam computed tomography (CBCT) viewing parameters such as contrast, slice thickness, and sharpness on the identification of the inferior alveolar nerve (IAC). A total of 25 CBCT scans, resulting in 50 IACs, were assessed by two investigators using a three-score system (good, average, and poor) on cross-sectional images. Slice thicknesses of 0.25 mm, 0.5 mm, and 1 mm were tested, along with varying sharpness (0, 6, 8, and 10) and contrast (0, 400, 800, and 1200) settings. The results were statistically analyzed to determine the optimal slice thickness for improved visibility of IAC, followed by evaluating the influence of sharpness and contrast using the optimal thickness. The identified parameters were then validated by performing semi-automated segmentation of the IACs and structure overlapping to evaluate the mean distance. Inter-rater and intra-rater reliability were assessed using Kappa statistics, and inferential statistics used Pearson’s Chi-square test. Inter-rater and intra-rater reliability for all parameters were significant, ranging from 69% to 83%. A slice thickness of 0.25 mm showed consistently “good” visibility (80%). Sharpness values of zero and contrast values of 1200 also demonstrated high frequencies of “good” visibility. Overlap analysis resulted in an average mean distance of 0.295 mm and a standard deviation of 0.307 mm across all patients’ sides. The study revealed that a slice thickness of 0.25 mm, zero sharpness value, and higher contrast value of 1200 improved the visibility and accuracy of IAC segmentation in CBCT scans. The individual patient’s characteristics, such as anatomical variations, decreased bone density, and absence of canal walls cortication, should be considered when using these parameters. |
| first_indexed | 2024-03-10T21:07:38Z |
| format | Article |
| id | doaj.art-2867a4192793474f954b183d4b535e1b |
| institution | Directory Open Access Journal |
| issn | 2075-4426 |
| language | English |
| last_indexed | 2024-03-10T21:07:38Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Personalized Medicine |
| spelling | doaj.art-2867a4192793474f954b183d4b535e1b2023-11-19T17:02:46ZengMDPI AGJournal of Personalized Medicine2075-44262023-10-011310151810.3390/jpm13101518The Influence of Slice Thickness, Sharpness, and Contrast Adjustments on Inferior Alveolar Canal Segmentation on Cone-Beam Computed Tomography Scans: A Retrospective StudyJulien Issa0Abanoub Riad1Raphael Olszewski2Marta Dyszkiewicz-Konwińska3Department of Diagnostics, Poznań University of Medical Sciences, Bukowska 70, 60-812 Poznan, PolandDepartment of Public Health, Faculty of Medicine, Masaryk University, 625 00 Brno, Czech RepublicDepartment of Oral and Maxilofacial Surgery, Cliniques Universitaires Saint Luc, UCLouvain, Av. Hippocrate 10, 1200 Brussels, BelgiumDepartment of Diagnostics, Poznań University of Medical Sciences, Bukowska 70, 60-812 Poznan, PolandThis retrospective study aims to investigate the impact of cone-beam computed tomography (CBCT) viewing parameters such as contrast, slice thickness, and sharpness on the identification of the inferior alveolar nerve (IAC). A total of 25 CBCT scans, resulting in 50 IACs, were assessed by two investigators using a three-score system (good, average, and poor) on cross-sectional images. Slice thicknesses of 0.25 mm, 0.5 mm, and 1 mm were tested, along with varying sharpness (0, 6, 8, and 10) and contrast (0, 400, 800, and 1200) settings. The results were statistically analyzed to determine the optimal slice thickness for improved visibility of IAC, followed by evaluating the influence of sharpness and contrast using the optimal thickness. The identified parameters were then validated by performing semi-automated segmentation of the IACs and structure overlapping to evaluate the mean distance. Inter-rater and intra-rater reliability were assessed using Kappa statistics, and inferential statistics used Pearson’s Chi-square test. Inter-rater and intra-rater reliability for all parameters were significant, ranging from 69% to 83%. A slice thickness of 0.25 mm showed consistently “good” visibility (80%). Sharpness values of zero and contrast values of 1200 also demonstrated high frequencies of “good” visibility. Overlap analysis resulted in an average mean distance of 0.295 mm and a standard deviation of 0.307 mm across all patients’ sides. The study revealed that a slice thickness of 0.25 mm, zero sharpness value, and higher contrast value of 1200 improved the visibility and accuracy of IAC segmentation in CBCT scans. The individual patient’s characteristics, such as anatomical variations, decreased bone density, and absence of canal walls cortication, should be considered when using these parameters.https://www.mdpi.com/2075-4426/13/10/1518diagnostic imagingX-rayscone-beam computed tomographymandibular canaltomography |
| spellingShingle | Julien Issa Abanoub Riad Raphael Olszewski Marta Dyszkiewicz-Konwińska The Influence of Slice Thickness, Sharpness, and Contrast Adjustments on Inferior Alveolar Canal Segmentation on Cone-Beam Computed Tomography Scans: A Retrospective Study Journal of Personalized Medicine diagnostic imaging X-rays cone-beam computed tomography mandibular canal tomography |
| title | The Influence of Slice Thickness, Sharpness, and Contrast Adjustments on Inferior Alveolar Canal Segmentation on Cone-Beam Computed Tomography Scans: A Retrospective Study |
| title_full | The Influence of Slice Thickness, Sharpness, and Contrast Adjustments on Inferior Alveolar Canal Segmentation on Cone-Beam Computed Tomography Scans: A Retrospective Study |
| title_fullStr | The Influence of Slice Thickness, Sharpness, and Contrast Adjustments on Inferior Alveolar Canal Segmentation on Cone-Beam Computed Tomography Scans: A Retrospective Study |
| title_full_unstemmed | The Influence of Slice Thickness, Sharpness, and Contrast Adjustments on Inferior Alveolar Canal Segmentation on Cone-Beam Computed Tomography Scans: A Retrospective Study |
| title_short | The Influence of Slice Thickness, Sharpness, and Contrast Adjustments on Inferior Alveolar Canal Segmentation on Cone-Beam Computed Tomography Scans: A Retrospective Study |
| title_sort | influence of slice thickness sharpness and contrast adjustments on inferior alveolar canal segmentation on cone beam computed tomography scans a retrospective study |
| topic | diagnostic imaging X-rays cone-beam computed tomography mandibular canal tomography |
| url | https://www.mdpi.com/2075-4426/13/10/1518 |
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