Study Cohort
Sixteen adult subjects with computed tomography (CT) images were selected based on a search of university medical records. The subjects are from four racial/ethnic groups: African Americans (Blacks); East Asians; Caucasians; and Latin Americans. The study cohort is made up of eight males and eight females, four subjects from each racial/ethnic group comprising of two males and two females. Inclusion criteria were normal nasal anatomy; high resolution spiral CT scan images; and no clinical evidence of nasal and/or sinonasal disease. CT images were examined by an attending radiologist and an otolaryngologist to ensure the nasal cavities of all subjects selected for this work had radiographic evidence of normal nasal cavity.