OBJECTIVES: (1) To compare 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 @entity35 and between their proximal, middle and distal regions. METHODS: The left femur, tibia and humerus from 24 4-6-month-old @entity35 were radiographed using intra-oral film and a @entity11339 ( @entity11339 ). Films were digitized at a pixel density comparable to the @entity11339 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 lines 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 @entity11339 (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.

Analysis of fractal dimensions of XXXX bones from film and digital images.

@entity35 :: ('10116', 'Species') :: ['rat', 'Sprague-Dawley rats'] @entity11339 :: ('MESH:D058747', 'Disease') :: ['CCD', 'charge-coupled device']
@entity35 :: (10116,Species) :: ['rat']
