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Shape analysis of 3D head scan data for U.S. respirator users.

Authors
Zhuang-Z; Slice-DE; Benson-S; Lynch-S; Viscusi-DJ
Source
EURASIP J Adv Signal Process 2010 Jan; 2010:248954
NIOSHTIC No.
20036697
Abstract
In 2003, the National Institute for Occupational Safety and Health (NIOSH) conducted a head-and-face anthropometric survey of diverse, civilian respirator users. Of the 3,997 subjects measured using traditional anthropometric techniques, surface scans and 26 three-dimensional (3D) landmark locations were collected for 947 subjects. The objective of this study was to report the size and shape variation of the survey participants using the 3D data. Generalized Procrustes Analysis (GPA) was conducted to standardize configurations of landmarks associated with individuals into a common coordinate system. The superimposed coordinates for each individual were used as commensurate variables that describe individual shape and were analyzed using Principal Component Analysis (PCA) to identify population variation. The first four principal components (PC) account for 49% of the total sample variation. The first PC indicates that overall size is an important component of facial variability. The second PC accounts for long and narrow or short and wide faces. Longer narrow orbits versus shorter wider orbits can be described by PC3, and PC4 represents variation in the degree of ortho/prognathism. GeometricMorphometrics provides a detailed and interpretable assessment ofmorphological variation that may be useful in assessing respirators and devising new test and certification standards.
Keywords
Anthropometry; Respirators; Respiratory-protective-equipment; Respiratory-protection; Personal-protective-equipment; Personal-protection; Humans
Publication Date
20100101
Document Type
Journal Article
Email Address
zaz3@cdc.gov
Fiscal Year
2010
NTIS Accession No.
NTIS Price
ISSN
1687-6172
NIOSH Division
NPPTL
Source Name
EURASIP Journal on Advances in Signal Processing
State
PA; FL
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