|
KMID : 0353319960200020175
|
|
Oral Biology Research
1996 Volume.20 No. 2 p.175 ~ p.187
|
|
|
A study on assessment of bone mass from aluminum-equivalent image by digital imaging system
|
|
|
|
|
Abstract
|
|
|
The purpose of this study was to evaluate the method for quantitative assessment of
bone mass from aluminum-equivalent value of hydroxyapatite by using digital imaging system consisted of Power Macintosh 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 from aluminum-equivalent value of hydroxyapatite block by correlation formula between aluminum-equivalent value of hydroxyapatite block and hydroxyapatite mass.
The results of this study were as follow;
1. Correlation between aluminum thickness and grey level for obtaining aluminum-equivalent image was high positively associated(r2=0.99). Converted masses from aluminum-equivalent value were very similar to measured masses. There was, statistically, no significant difference(P<0.05) between them.
2. Correlation between hydroxyapatite aluminum-equivalent and hydroxyapatite mass was shown to linear relation(rz=0.95).
3. Converted masses from aluminum-equivalent value of 3 dry mandible segments were similar to measured masses. The difference between the exposure directions was not significantly different(P<0.05).
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
Listed journal information
|
|
|