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Titolo:
Analysis of fractal dimensions of rat bones from film and digital images
Autore:
Pornprasertsuk, P; Ludlow, JB; Webber, RL; Tyndall, DA; Yamauchi, M;
Indirizzi:
Univ N Carolina, Sch Dent, Dept Diagnost Sci & Gen Dent, Chapel Hill, NC 27599 USA Univ N Carolina Chapel Hill NC USA 27599 Dent, Chapel Hill, NC 27599 USA
Titolo Testata:
DENTOMAXILLOFACIAL RADIOLOGY
fascicolo: 3, volume: 30, anno: 2001,
pagine: 179 - 183
SICI:
0250-832X(2001)30:3<179:AOFDOR>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAMMOGRAPHIC LESIONS; OSTEOPOROSIS; RADIOGRAPHS;
Keywords:
digital radiography, dental; fractals; bone; image processing, computer-assisted;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
10
Recensione:
Indirizzi per estratti:
Indirizzo: Pornprasertsuk, P Univ N Carolina, Sch Dent, Dept Diagnost Sci & Gen Dent,Chapel Hill, NC 27599 USA Univ N Carolina Chapel Hill NC USA 27599 , NC 27599 USA
Citazione:
P. Pornprasertsuk et al., "Analysis of fractal dimensions of rat bones from film and digital images", DENTOMAX R, 30(3), 2001, pp. 179-183

Abstract

Objectives: (1) To connpare the effect of two different intra-oral image receptors on estimates of fractal dimension, and (2) to determine the variations in fractal dimensions between the femur, tibia and humerus of the rat and between their proximal, middle and distal regions,Methods: The left femur, tibia and humerus from 24 4-6-month-old Sprague-Dawley: rats were radiographed using intra-oral film and a charge-coupled device (CCD), Films were digitized at a pixel density comparable to the CCB using a flat-bed scanner. Square regions of interest were selected from proximal. middle, and distal regions of each bone. Fractal dimensions were estimated from the slope of regression lints fitted to plots of log power against log spatial frequency. Results: The fractal dimensions estimates from digitized films were significantly greater than those produced from the CCD (P= 0.0008). Estimated fractal dimensions of three types of bone were not significantly different (P=0.0544): however, the three regions of bones were significantly different (P=0.0239). The fractal dimensions estimated from radiographs of the proximal and distal regions of the bones were lower than comparable estimates obtained from the middle region,Conclusions: Different types of image receptors significantly affect estimates of fractal dimension, There was no difference in the fractal dimensions of the different bones but the three regions differed significantly.

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Documento generato il 04/04/20 alle ore 02:47:53