J Korean Acad Oral Maxillofac Radiol.  1997 Feb;27(1):17-24.

Comparison of digitized radiographic alveolar features with age

• Lee KI

Abstract

The purpose of the present stydy was to use digital profile image features and digital imge analysis of fixed-dime nsion bone regions, extracted from standardized periapical radiographs of the maxilla, to determine whether differences exist in alveolar bone of younger women(mean age: 59.23+/-7.34 years) and just menopaused women(mean age: 59.23+/-7.34), Periapical films were used from two groups of 20 randomly selected women. None of the subjects had a remarkabel medical history. To simplify protocal, we chose one interproximal bone area between the maxillary right canine and lateral inci sor for study. Each film was digitized into a 1312X1024 pixelX8 bit depth matrix by means of a Nikon 35 mm film scanner(LS-3510AF, Japan) with fixed gain and internal dark current correction to maintain constant illumination. The scanner was interfaced to a Macintosh LC III computer(Apple Computer, Charlotte, N.C.). Area and profile orientation were selecte d with a NIMH Image 1.37(NIH Research Services Brach, Bethesda, Md.). Histogram features were extracted form each profil e and area. The results of this study indicate that mean pixel intensities didn't differ significantly between two group s and there was a high correlation-coefficient between digitized radiographic profile features and area features.

MeSH Terms

Female
Humans
Lighting
Maxilla
National Institute of Mental Health (U.S.)