Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Parametric Survival Analysis: Weibull and Exponential Methods01:14

Parametric Survival Analysis: Weibull and Exponential Methods

1.0K
Parametric survival analysis models survival data by assuming a specific probability distribution for the time until an event occurs. The Weibull and exponential distributions are two of the most commonly used methods in this context, due to their versatility and relatively straightforward application.
Weibull Distribution
The Weibull distribution is a flexible model used in parametric survival analysis. It can handle both increasing and decreasing hazard rates, depending on its shape parameter...
1.0K
How Data are Classified: Categorical Data01:11

How Data are Classified: Categorical Data

42.9K
A variable, usually notated by capital letters such as X and Y, is a characteristic or measurement that can be determined for each member of a population. Data are the actual values of variables. They may be numbers, or they may be words. Datum is a single value.
Data are classified based on whether they are measurable or not. Categorical data cannot be measured; instead, it can be divided into categories. For example, if Y denotes a person's party affiliation, some examples of Y include...
42.9K
Molecular Shapes01:18

Molecular Shapes

61.4K
Molecules have characteristic shapes that are crucial for their function. The arrangement of various electron groups around the central atom dictates their molecular geometry. Electron pairs in the valence shell of a central atom will adopt an arrangement that minimizes repulsions between the electron pairs by maximizing the distance between them. The valence electrons form either bonding pairs, located primarily between bonded atoms, or lone pairs.
Two regions of electron density in a diatomic...
61.4K
Molecular Shape and Polarity03:37

Molecular Shape and Polarity

74.4K
Dipole Moment of a Molecule
74.4K
VSEPR Theory and the Basic Shapes02:52

VSEPR Theory and the Basic Shapes

84.0K
Overview of VSEPR Theory
84.0K
Nose and Nasal Cavity01:24

Nose and Nasal Cavity

10.9K
The nose is composed of an observable exterior segment (external nose) and an internal segment within the skull known as the nasal cavity (internal nose). The external nose, visible on the face, consists of a framework of bone and hyaline cartilage enveloped in skin and muscle and lined with a mucous membrane. This structure is supported by the frontal bone, nasal bones, and maxillary bone and is supplemented by a cartilaginous framework comprising the septal nasal cartilage, lateral nasal...
10.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Strategies for the Previously Operated Septum.

Facial plastic surgery clinics of North America·2026
Same author

Optical coherence tomography to identify upper airway obstruction sites in an apneic patient.

Biophotonics discovery·2026
Same author

Erratum: Publisher's Note: Optical coherence tomography to identify upper airway obstruction sites in an apneic patient.

Biophotonics discovery·2026
Same author

Features of Importance in the Nasal Exam in Rhinoplasty.

Facial plastic surgery & aesthetic medicine·2026
Same author

A Bayesian Hierarchical Longitudinal Model for Estimation of Central Visual Field Rates of Change in Glaucoma.

Translational vision science & technology·2025
Same author

A Joint Bayesian Longitudinal Model for Macular Structure-Function Correlations in Glaucoma.

Ophthalmology science·2025

Related Experiment Video

Updated: Jan 21, 2026

Precision Measurements and Parametric Models of Vertebral Endplates
10:35

Precision Measurements and Parametric Models of Vertebral Endplates

Published on: September 17, 2019

6.8K

Categorization and Analysis of Nasal Base Shapes Using a Parametric Model.

Alisa Zhukhovitskaya1, Dalan Cragun2, Erica Su3

  • 1Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of California, Irvine.

JAMA Facial Plastic Surgery
|July 26, 2019
PubMed
Summary

This study developed a parametric model for objective nasal base shape analysis in rhinoplasty. The model showed significant differences in key parameters across shapes, offering a numerical approach for clinical use.

More Related Videos

Quantification of Global Diastolic Function by Kinematic Modeling-based Analysis of Transmitral Flow via the Parametrized Diastolic Filling Formalism
11:04

Quantification of Global Diastolic Function by Kinematic Modeling-based Analysis of Transmitral Flow via the Parametrized Diastolic Filling Formalism

Published on: September 1, 2014

11.6K
Three-Dimensional Shape Modeling and Analysis of Brain Structures
05:33

Three-Dimensional Shape Modeling and Analysis of Brain Structures

Published on: November 14, 2019

7.6K

Related Experiment Videos

Last Updated: Jan 21, 2026

Precision Measurements and Parametric Models of Vertebral Endplates
10:35

Precision Measurements and Parametric Models of Vertebral Endplates

Published on: September 17, 2019

6.8K
Quantification of Global Diastolic Function by Kinematic Modeling-based Analysis of Transmitral Flow via the Parametrized Diastolic Filling Formalism
11:04

Quantification of Global Diastolic Function by Kinematic Modeling-based Analysis of Transmitral Flow via the Parametrized Diastolic Filling Formalism

Published on: September 1, 2014

11.6K
Three-Dimensional Shape Modeling and Analysis of Brain Structures
05:33

Three-Dimensional Shape Modeling and Analysis of Brain Structures

Published on: November 14, 2019

7.6K

Area of Science:

  • Plastic Surgery
  • Facial Anatomy
  • Quantitative Morphology

Background:

  • Nasal base analysis is crucial for rhinoplasty.
  • Current shape descriptors are subjective and qualitative.

Purpose of the Study:

  • Evaluate a parametric model for nasal base shape.
  • Develop an objective classification system for clinical use.
  • Compare model-based categorization with surgeon assessments.

Main Methods:

  • Retrospective review of 420 patient photographs.
  • Nasal bases classified into 6 visual categories.
  • MATLAB software used for contour tracing and parametric modeling.
  • Statistical analysis including ANOVA and logistic regression.

Main Results:

  • Statistically significant differences found in projection-to-width ratio, tip bulk positioning, and lateral recurvature across shape categories.
  • Model categorization achieved 65.9% concordance with surgeons for classified bases.
  • Model showed potential for objective nasal base shape analysis.

Conclusions:

  • A parametric model offers an objective, numerical method for nasal base shape analysis.
  • This approach can enhance clinical evaluation and communication in rhinoplasty.
  • Further validation may refine its application in plastic surgery.