Comparison of the accuracy of linear measurements in CBCT images with different field of views
DOI:
https://doi.org/10.11606/issn.2357-8041.clrd.2022.194059Keywords:
Cone beam computed tomography, Linear measurement, MandibleAbstract
This study sought to investigate the effect of the field of view (FOV) on linear measurements of cone beam computed tomography (CBCT) images. Methods: In this in vitro study, five dry human skulls were used. After using red wax to simulate soft tissue, the skulls were scanned using Galileos CBCT scanner (Sirona, Bensheim, Germany) with exposure parameters of 85 kVp and 21 mAs and voxel size of 0.280 mm; once with FOV of 15 cm × 8 cm and once again with 15 cm × 15 cm. The measured distances were the distance between the center of the bilateral mental foramen in the axial view (MM), the distance between the alveolar crest and the mandibular inferior border in the sagittal view on the midline (CB), and the depth of the socket of the left mandibular central incisor (L1). Descriptive statistics as well as Pearson’s correlation coefficient were used for statistical analysis (α = 0.05) using SPSS software (v. 25, IBM, NY, USA). Results: The measurements obtained with small and large FOV and with the dry skull were not significantly different (p > 0.05). The measurements obtained in small FOV had excellent correlation coefficient when compared with those obtained with the dry skull, with values of 0.890 for MM, 0.954 for CB, and 0.921 for L1 (p < 0.001). The measurements in large FOV also had excellent correlation coefficient when compared with those on the dry skull, with values of 0.894 for MM, 0.949 for CB, and 0.902 for L1 (p < 0.001). Conclusion: According to our findings, linear measurements obtained by CBCT scans in small and large FOVs were not significantly different than those on dry skulls. Since the linear measurements are accurate regardless of FOV size, selection of FOV must be based on patient factors, such as area of interest and radiation dose.
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Mehdizadeh M, Booshehri SG, Kazemzadeh F, Soltani P, Motamedi MRK. Level of knowledge of dental practitioners in Isfahan, Iran about cone-beam computed tomography and digital radiography. Imaging Sci Dent. 2015;45(2):133-5. Doi: https://doi.org/10.5624/isd.2015.45.2.133.
Gaêta-Araujo H, Alzoubi T, Vasconcelos KF, Orhan K, Pauwels R, Casselman JW, et al. Cone beam computed tomography in dentomaxillofacial radiology: a two-decade overview. Dentomaxillofac Radiol. 2020;49(8):20200145. Doi: https://doi.org/10.1259/dmfr.20200145.
de Oliveira Pinto MG, Melo SLS, Suassuna FCM, Marinho LE, Leite JBS, Batista AUD, et al. Influence of size of field of view (FOV), position within the FOV, and scanning mode on the detection of root fracture and observer’s perception of artifacts in CBCT images. Dentomaxillofac Radiol. 2021;50(6):20200563. Doi: https://doi.org/10.1259/dmfr.20200563.
Nascimento HAR, Andrade MEA, Frazão MAG, Nascimento EHL, Ramos-Perez FMM, Freitas DQ. Dosimetry in CBCT with different protocols: emphasis on small FOVs including exams for TMJ. Braz Dent J. 2017;28(4):511-6. Doi: https://doi.org/10.1590/0103-6440201701525.
Ganguly R, Ramesh A, Pagni S. The accuracy of linear measurements of maxillary and mandibular edentulous sites in cone-beam computed tomography images with different fields of view and voxel sizes under simulated clinical conditions. Imaging Sci Dent. 2016;46(2):93-101. Doi: https://doi.org/10.5624/isd.2016.46.2.93.
Fokas G, Vaughn VM, Scarfe WC, Bornstein MM. Accuracy of linear measurements on CBCT images related to presurgical implant treatment planning: a systematic review. Clin Oral Implants Res. 2018;29(Suppl 16):393-415. Doi: https://doi.org/10.1111/clr.13142.
Kamburoglu K, Murat S, Kiliç C, Yüksel S, Avsever H, Farman A, et al. Accuracy of CBCT images in the assessment of buccal marginal alveolar peri-implant defects: effect of field of view. Dentomaxillofac Radiol. 2014;43(4):20130332. Doi: https://doi.org/10.1259/dmfr.20130332.
Al-Ekrish AA, Ekram M. A comparative study of the accuracy and reliability of multidetector computed tomography and cone beam computed tomography in the assessment of dental implant site dimensions. Dentomaxillofac Radiol. 2011;40(2):67-75. Doi: https://doi.org/10.1259/dmfr/27546065.
Elshenawy H, Aly W, Salah N, Nasry S, Anter E, Ekram K. Influence of small, midi, medium and large fields of view on accuracy of linear measurements in CBCT imaging: diagnostic accuracy study. Open Access Maced J Med Sci. 2019;7(6):1037-41. Doi: https://dx.doi.org/10.3889%2Foamjms.2019.232.
Kiarudi AH, Eghbal MJ, Safi Y, Aghdasi MM, Fazlyab M. The applications of cone-beam computed tomography in endodontics: a review of literature. Iran Endod J. 2015;10(1):16-25.
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Copyright (c) 2022 Mojdeh Mehdizadeh, Ali Erfani, Parisa Soltani
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