Comparison of precision and accuracy of linear measurements performed by two different imaging software programs and obtained from 3D-CBCT images for Le Fort I osteotomy

Abstract

Objective: The purpose of this study was to compare the precision and accuracy of linear measurements for Le Fort I osteotomy performed by two different imaging software programs and obtained from three-dimensional cone beam CT (3D-CBCT) images. Methods: The study population consisted of 11 dried skulls submitted to CBCT, which generated 3D images. Linear measurements were based on craniometric anatomical landmarks pre-defined by the authors as specifically used for Le Fort I osteotomy and were identified by two radiologists twice each, independently, using Vitrea 3.8.1 (Vital Images Inc., Plymouth, MN) and open-source digital imaging communication in medicine viewer OsiriX 1.2 64-bit (Pixmeo, Geneva, Switzerland). Subsequently, a third examiner made physical measurements using a digital caliper (167 series; Mitutoyo Sul Americana Ltd, Suzano, SP, Brazil). Results: The results demonstrated a statistically significant difference between OsiriX and the gold standard, especially in the pterygoid process (TPtg L 5 0.019, LLpPtg R 5 0.016 and LLpPtg L 5 0.012). Vitrea showed no statistical difference in comparison with the gold standard, and showed a high level of accuracy in all the measurements performed. The major difference found was 0.42 mm (LLpPtg R). Interexaminer analysis ranged from 0.90 to 0.97 using Vitrea and from 0.8 to 0.97 using OsiriX. Intraexaminer correlation coefficient ranged from 0.90 to 0.98 and from 0.84 to 0.98 for Examiners 1 and 2, respectively, using Vitrea and from 0.93 to 0.99 for Examiner 1 and from 0.64 to 0.96 for Examiner 2 using OsiriX. Conclusion: Vitrea may be considered as precise and accurate, insofar as it was able to perform all the 3D linear measurements. On the other hand, linear measurements performed using OsiriX were not successful in producing accurate linear measurements for Le Fort I osteotomy.

Morphological evaluation of the mandibular lingula using cone-beam computed tomography

“…The increased use of diagnostic imaging acquired by means of cone-beam computed tomography (CBCT) has led to various studies of anatomical structures and possible anatomical differences [7]. Three--dimensional (3D) reconstructed images from CBCT are more reliable and accurate than 2D radiography of craniofacial structures for diagnosis, and allow multiple imaging post-processing protocols for better and more effective treatment planning and evaluation [3,10].…”

Reproducibility of Linear Measurements Performed with 3-D Cone Beam Computed Tomography: Scan Reconstructions in Region of Pterygomaxillary Junction

“…It has been evaluated by direct inspection [14][15][16][17][18] as well as with 3D CBCT reconstruction images [14,15,18]. However, these programs use different reconstruction algorithms or different methods of measurement, or both.…”

“…Modern imaging software allows for endocranial navigation, image rotation and translation, brightness and contrast adjustment, multiplanar and 3D reconstructions, and linear and angular measurements [14]. These can be used for appropriate planning, which predicts outcomes related to the orthognathic surgery [15]. Surgeons are obligated to increase the safety of orthognathic surgery procedures and to minimize the risk of complications [8].…”

Facial pattern analysis: critic review and collection of facial proportions in a brazilian sample using cone-beam computed tomography

“…Precise linear and angular measures can be obtained without influence of magnification and positioning errors, which are critical characteristics of regular radiology (BERCO et al, 2009;HASSAN et al, 2009;MOREIRA et al, 2009;FOURIE et al, 2010;EL-BEIALY et al, 2011;KAPILA et al, 2011;GAIA et al, 2013). Nevertheless, there are limited descriptions of tridimensional (3D) methods for facial pattern diagnosis on CBCT.…”