Reliability of a method to conduct upper airway analysis in cone-beam computed tomography

Souza, Karen Regina Siqueira de; Oltramari-Navarro, Paula Vanessa Pedron; Navarro, Ricardo de Lima; Conti, Ana Cláudia de Castro Ferreira; Almeida, Márcio Rodrigues de

doi:10.1590/s1806-83242013000100009

Cited by 33 publications

(20 citation statements)

References 25 publications

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“…However, a few studies have assessed the reliability of different protocols to delineate the upper airway in adults. [46][47][48] Very high reproducibility was found in all This is in agreement with the present study were the ICC value was 1.00. However, there was greater variation in the reliability of minimal oropharyngeal cross-sectional area measurements in previous adult studies.…”

Section: Discussionsupporting

confidence: 92%

Proposal of new upper airway margins in children assessed by CBCT

Anandarajah¹,

Abdalla²,

Dudhia³

et al. 2015

Dentomaxillofacial Radiology

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Objectives: Recently, studies have performed three-dimensional analyses of upper airways in children. However, there was a lack of airway delineation according to anatomical boundaries and/or easily mobile soft-tissue landmarks were used. The aim of the present study was to define new upper airway margins in children on CBCT according to anatomical bony landmarks and to validate the method. Methods: 25 scans were randomly selected from a larger database containing CBCT scans of children prior to orthodontic treatment (14 girls and 11 boys; mean age, 10.9 ± 2.5 years). Scans were evaluated by two observers. Specific head positioning and virtual orientation protocols were adopted and greyscale thresholding was established for each patient. Volume and minimum cross-sectional area of the oropharynx were calculated. Intra-and interobserver reliability were assessed by reassessment of the CBCTs 2 weeks later. Results: The new airway margins were defined superiorly by a line passing through the palatal plane (anterior nasal spine to posterior nasal spine) extending to the posterior wall of the pharynx, inferiorly by a line passing from the anterosuperior edge of C4 to menton, anteriorly by a line passing from the soft palate to menton, posteriorly and laterally by the respective pharyngeal walls. Method error for airway volume and minimal cross-sectional area was #2.00%, and intra-and interobserver reliability ranged from 0.99 to 1.00. Conclusions: The proposed protocol utilizes easily identifiable bony landmarks to delineate the upper airway on cone beam scans of children and was found to be reliable and reproducible.

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Section: Discussionsupporting

confidence: 92%

Proposal of new upper airway margins in children assessed by CBCT

Anandarajah¹,

Abdalla²,

Dudhia³

et al. 2015

Dentomaxillofacial Radiology

View full text Add to dashboard Cite

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“…This is similar to what has been found in the international literature (Vig et al, 1980;Hoffstein et al, 1991;Aboudara et al;Souza et al).…”

Section: Discussionsupporting

confidence: 91%

“…Its measurement was performed according to the methods described by Souza, Swennen, Ludlow and Brown (Swennen et al, 2006;Ludlow et al, 2009;Brown et al, 2009;Souza et al).…”

Section: Volume Of the Upper Airwaymentioning

confidence: 99%

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Two-dimensional and Three-dimensional Assessment of the Upper Airway

2017

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VILAZA, I.; ARAYA-DÍAZ, P. & PALOMINO, H. M. Two-dimensional and three-dimensional assessment of the upper airway. Int. J. Morphol., 35(1):357-362, 2017. SUMMARY:The aim of this study was to validate and correlate the two-dimensional (2D) with the three-dimensional (3D) measures of the upper airway assessment. Lateral cephalograms and cone beam CT of 100 adult subjects were used to perform a 2D and 3D assessment of the upper airway. Spearman correlation coefficient was used to determine whether there was correlation between variables. Additionally, specificity, sensitivity, negative predictive value and positive predictive value was calculated for the 2D assessment of the upper airway. Correlation between all two and three dimensional variables was found. In the nasopharynx and oropharynx, a weak correlation (r <0.51) was found; in the oropharynx a moderate one (0.50

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“…[14][15][16] Given that the evaluation of NSD in CT images is currently mainly based on subjective clinic and radiologic analyses, many studies are trying to find homogeneous and standard evaluation criteria based on the morphometric analysis of the nasal airways. 1,[17][18][19] Among them, three-dimensional segmentation is currently used for morphological evaluation of the upper airways, mainly to assess obstructive sleep apnoea, traumas and congenital malformations. [20][21][22] In the present study, we segmented several CBCT images to create three-dimensional models of the nasal airways, which were used to calculate three-dimensional parameters that describe their morphology.…”

Section: Introductionmentioning

confidence: 99%

The nasal septum deviation index (NSDI) based on CBCT data

Codari¹,

Zago²,

Guidugli³

et al. 2016

Dentomaxillofacial Radiology

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Objective: To assess whether three-dimensional morphometric parameters could be useful in nasal septal deviation (NSD) diagnosis and, secondarily, whether CBCT could be considered an adequate imaging technique for the proposed task. Methods: We analysed images of 46 subjects who underwent CBCT for reasons not related to this study. Two experienced operators divided all the images into healthy and NSD subjects. Subsequently, the images were segmented using ITK Snap in order to obtain the three-dimensional model of the nasal airways and compute four morphological parameters: septal deviation angle (SDA), percentage of volume difference between right and left side of the nasal airways, nasal airway total volume and a new synthetic septal deviation index (SDI). Principal component analysis (PCA) was used to unveil relationships between each variable and the global nasal airway variability. Results: Differences between the groups were found in SDA (p , 0.001), in volume percentage difference (p , 0.05) and in SDI (p , 0.001). PCA showed high correlation between the SDI and the first principal component (0.97, p , 0.001). Conclusions: Among the analysed parameters, SDI seemed to be the most suitable for the quantitative assessment of NSD, and CBCT allowed accurate assessment of airway morphology.

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Reliability of a method to conduct upper airway analysis in cone-beam computed tomography

Cited by 33 publications

References 25 publications

Proposal of new upper airway margins in children assessed by CBCT

Proposal of new upper airway margins in children assessed by CBCT

Two-dimensional and Three-dimensional Assessment of the Upper Airway

The nasal septum deviation index (NSDI) based on CBCT data

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