Change of the fractal dimension according to the decalcification degree and the exposure time in the bovine rib.
- Author:
Yun Hoa JUNG
1
;
Kyung Soo NAH
;
Bong Hae CHO
Author Information
1. Department of Oral and Maxillofacial Radiology, College of Dentistry, Pusan National University, Korea. bhjo@pusan.ac.kr
- Publication Type:Original Article
- Keywords:
Fractals;
Bone and Bones;
Osteoporosis;
Radiography
- MeSH:
Bone and Bones;
Fractals*;
Humans;
Hydrochloric Acid;
Osteoporosis;
Radiography;
Ribs*
- From:Korean Journal of Oral and Maxillofacial Radiology
2006;36(2):69-72
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: We evaluated the fractal dimension changes on bovine rib radiographs according to the decalcification degree and the exposure time in the bovine rib. MATERIALS AND METHODS: Twenty 5 mm thick cross-sectional blocks from bovine rib bone were progressively decalcified in 30 mL 0.1 N hydrochloric acid for 5, 30, and 90 minutes. They were radiographed at three exposure time settings (0.22, 0.36, 0.43 mAs) before and after each decalcification stage. We selected 100 x 100 pixel-sized regions of interests (ROIs) on trabecular bone and calculated fractal dimensions by box-counting method. RESULTS: Repeated measures ANOVA showed that fractal dimensions gradually decreased after acid-induced demineralization and with more exposure (P<0.001). CONCLUSION: The fact that fractal dimensions decrease after decalcification might support the hypothesis that patients with osteoporosis have decreased radiographic fractal dimension in trabecular bone in comparison to normal subjects.
