Application of off-the-shelf stereo-cameras for the 3D assessment of morphometric variations caused by rhinoplasty

Galantucci, Luigi Maria; Lavecchia, Fulvio; Pastore, Patrizia; Percoco, Gianluca

doi:10.1080/03091902.2017.1281356

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…The quantitative approach provides insight on nasal geometry, and recent analytic methods have described overall nasal shape . These techniques could transform reporting of outcomes for aesthetic rhinoplasty.…”

Section: Discussionmentioning

confidence: 99%

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Functional Outcomes, Quantitative Morphometry, and Aesthetic Analysis of Articulated Alar Rim Grafts in Septorhinoplasty

Calloway

Heilbronn

et al. 2019

JAMA Facial Plast Surg

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IMPORTANCEThe design, use, and indications for the articulated alar rim graft (AARG) and the functional and aesthetic improvements that can be achieved have not been fully characterized.OBJECTIVE To analyze the functional and aesthetic outcomes of AARG placement on nasal airway function, nasal base shape change, and appearance. DESIGN, SETTING, AND PARTICIPANTSA case series study of patients who underwent septorhinoplasty with placement of AARG at University of California, Irvine Medical Center, from 2015 to 2018 was carried out. Surgical data recorded included stage of rhinoplasty (primary vs revision), use of spreader grafts, rim grafts (and dimensions), caudal septal extension graft (CSEG), lateral crural tensioning (LCT), and turbinate reductions. MAIN OUTCOMES AND MEASURES Preoperative and postoperative Nasal ObstructionSymptom Evaluation Survey (NOSE) surveys were analyzed and correlated with AARG geometry, use of CSEG, and the LCT maneuver. Preoperative and postoperative alar base views were evaluated by fitting base shape to a parametric numerical model to categorize each to 1 of 6 shape categories. Blinded reviewers rated alar furrow severity and the alar ridge presence using a Likert scale for both preoperative and postoperative images to subjectively gauge aesthetic outcomes. RESULTSOverall, 90 patients with both preoperative and postoperative NOSE scores who underwent septorhinoplasty and placement of an AARG were included. Of the 90 patients, 60 were women (mean age, 38.2 years). Patient NOSE scores (70.4 preoperatively to 25.1 postoperatively) significantly improved from preoperation to postoperation (P < .001), regardless of AARG size, CSEG, or LCT. Alar base shape parametric analysis showed preoperative to postoperative improvements were significant for anterior-to-posterior ratio mass distribution (95% CI, −0.16 to 0.02; P = .05) and vertical projection-to-horizontal base width ratio (95% CI, 0.01-0.32; P = .02) in flat noses and cloverleafing for narrow noses (95% CI, −0.05 to −0.01; P = .001); enhancement approached significance for reduction in lateral scalloping in cloverleaf noses (P = .06). Aesthetic analysis showed that there was a statistically significant improvement for the alar furrow (95% CI, −0.68 to −0.29 for rater 1; −0.54 to −0.27 for rater 2; and −0.59 to −0.27 for rater 3; P < .001) for all raters and for the alar ridge (95% CI, 0.16-0.48; P < .001) for 1 rater. CONCLUSIONS AND RELEVANCETo our knowledge, this is the first study to demonstrate that AARG use is associated with statistically significant improvement in NOSE scores. Placement of AARGs may improve posterior mass ratios in flat noses and lateral cloverleafing in narrow noses as suggested by quantitative shape change parameter analysis. The placement of AARGs was associated with aesthetic and functional enhancement in the cloverleaf deformity, which is associated with a prominent alar furrow, and often external nasal valve collapse. Patient selection is key when placing AARGs.LEVEL OF EVIDENCE NA.

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Section: Discussionmentioning

confidence: 99%

“…7,8,11 The quantitative approach provides insight on nasal geometry, and recent analytic methods have described overall nasal shape. 21 These techniques could transform reporting of outcomes for aesthetic rhinoplasty. Nasal base phenotype varies along a continuum, and noses may share features of more than 1 archetypal shape.…”

Section: Geometric Analysismentioning

confidence: 99%

Functional Outcomes, Quantitative Morphometry, and Aesthetic Analysis of Articulated Alar Rim Grafts in Septorhinoplasty

Calloway

Heilbronn

et al. 2019

JAMA Facial Plast Surg

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“…24 Off-the-shelf stereo cameras for the 3D assessment of morphometric variations caused by rhinoplasty were found to be useful for stereo-photogrammetric facial digitization and morphometric analysis of the human face. 25 Regarding the spatial resolution of a 3dMD scanning system, a global error with a range from 0.1 to 0.5 mm was found in an experimental setting. 14 Differences between direct measurements and 3D measurements of up to 1 mm were found when measuring nasal width.…”

mentioning

confidence: 93%

The Nasal Width and Boxiness Index: Introduction and Pilot Study on Reliability and Validity of Sonographic Morphometry

Tasman

Litschel

2018

Facial plast Surg

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Both intended and unintended surgical modifications of nasal width and shape of the nasal tip continue to be of interest to the rhinoplasty surgeon. As validated instruments for quantifying width and boxiness are lacking, the objective of this study was to introduce a width index and a boxiness index for the nasal dorsum and the nasal tip. A width index and a boxiness index were defined within the methodological limits of noncontact sonography. The reliability of both indices was studied by comparing the measurements of two examiners on the noses of five volunteers. The validity of the indices was studied by correlating the sonographic width and boxiness with the 5-point Likert scale ratings of photographs of 5 noses by 21 lay persons. Nasal width was defined as the diameter at a distance of 5 mm from the skin surface on a sonographic cross-section perpendicular to the skin surface. Boxiness was defined as the quotient of width at a depth of 1 and 5 mm. Bland-Altmann analysis revealed negligible bias between both examiners and 95% of limits of agreement of 13, 7, and 13% for width at 1 mm, width at 5 mm, and boxiness, respectively. Corresponding Pearson's correlation coefficients were = 0.93, = 0.93, and = 0.71. The correlation between the cumulative lay persons' scores and sonographic width and boxiness were = 0.97, = 0.66, and = 0.81 for nasal tip width, dorsal width, and boxiness, respectively. Both the width at a depth of 5 mm as measured with sonography and the boxiness index that is defined as width at a depth of 1 mm divided by the width at a depth of 5 mm may prove to be acceptable surrogate parameters for width and boxiness of the nose in comparative morphometric studies.

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A novel framework for quantitative rhinoplasty evaluation by ResNet convolutional neural network

Bouchani,

Zoroofi,

Sadeghi

2024

Biomedical Engineering Advances

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Application of off-the-shelf stereo-cameras for the 3D assessment of morphometric variations caused by rhinoplasty

Cited by 3 publications

References 23 publications

Functional Outcomes, Quantitative Morphometry, and Aesthetic Analysis of Articulated Alar Rim Grafts in Septorhinoplasty

Functional Outcomes, Quantitative Morphometry, and Aesthetic Analysis of Articulated Alar Rim Grafts in Septorhinoplasty

The Nasal Width and Boxiness Index: Introduction and Pilot Study on Reliability and Validity of Sonographic Morphometry

A novel framework for quantitative rhinoplasty evaluation by ResNet convolutional neural network

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