A study on assessment of bone mass from aluminum-equivalent image by digital imaging system.
- Author:
Jin Soo KIM
1
;
Jae Duk KIM
Author Information
1. Department of Oral and Maxillofacial radiology, College of Dentistry, Chosun University, Korea.
- Publication Type:Original Article
- MeSH:
Aluminum;
Durapatite;
Equidae;
Mandible
- From:Journal of Korean Academy of Oral and Maxillofacial Radiology
1997;27(1):87-97
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
The purpose of this study was to evaluated the method for quantitative assessment of bone mass from aluminum-equiv alent value of hydroxyapatite by using digital imaging system consisted of Power Macitosh 7200/120, 15-inch color monitor, and GT-9000 scanner with transparency unit. After aluminum-equivalent image made from correlation between aluminum thickness and grey scale, the accuracy of conversion to mass from aluminum-equivalent value was evaluated. Measured bone mass was compared with converted bone mass fr om aluminum-equivalent value of hydroxyapatite block by correlation formula between aluminum-equivalent value of hydroxy apatite block and hydroxyapatite mass. The results of this study were as follows: 1. Correlation between aluminum thickness and grey level for obtaining aluminum-equivalent imge was high positively ass ociated(r2=0.99). Converted masses from aluminum-equivalent value were very similar to measured masses. There was, statistically, no significnat difference(P<0.05) between them. 2. Correlation between hydroxyapatitie aluminum-equivalent and hydroxyapatite mass was shown to linear relation(r2 =0.95). 3. Converted masses from aluminum-equivalent value of 3 dry mandible segments were similar to measured masses. the diff erence between the exposure directions was not significantly different(P<0.05).
