The bone mineral density (BMD)
To deal with the processing of images of the dissectors, a computer program was developed using the GTK+ for MS-Windows. The results were compared to the BMD. Results: It was verified that the measurement of the EPC is correlated with the results obtained by means of the BMD for the lumbar vertebrae. It was also demonstrated that the area of connectivity of the trabecular that is propagated over the dissectors corroborates to ensure that the results of the EPC are consistent with the BMD measurement. Conclusions:The application of ECP in the analysis of the vertebral tomographies could constitute a method to evaluate the trabecular bone structure, and its correlation with the mechanical resistance of the bone, however being necessary more studies to confirm this data.
We evaluated a low cost device for digitizing X-ray films. It consisted of a locally-made wooden box and a readily-available digital camera. Two experienced paediatric radiologists interpreted the original X-ray films (the reference standard) and the corresponding images obtained in the photo light box. Ninety paediatric chest X-ray films were used (30 were normal chest radiographs, 30 showed pneumonic-consolidation and 30 had interstitial infiltrates). The presence or absence of the three signs most frequently found in acute respiratory pathologies were evaluated: normal pulmonary transparency, pneumonic consolidation and interstitial infiltration. There was very good agreement between the X-ray films and the digitized images, with kappa values from 0.86 to 0.98. There was good agreement between the two observers, with kappa values from 0.67 to 0.90. The low-cost photo light box represents an accessible and low-cost approach to transmitting X-ray images, allowing findings or a second opinion from a specialist radiologist to be obtained from a distance.
Introduction: The mechanical competence of bone is a function bone mass and architecture but BMD alone is not able to reflect bone quality. The modeling of porous mediums, is an important method for the comprehension of the physical and geometrical properties of trabecular bone. Objectives: Develop a technique to identify the connectivity of the trabecular three-dimensional porous space by using the study of dissectors. Methods: The connectivity between porous of neighbor slices is identified in the orthogonal direction. The three-dimensional porous space connectivity is calculated by using the Euler-Poincaré volumetric characteristics technique. Seven cadaver collected vertebrae were scanned by Hologic 4500A DXA and by a Siemens Somatom Plus CT by using a resolution of 512 x 512 pixels, slices of 2.0 mm thickness, setting of 120 kV and 110 mA. The images were segmented by using image processor software and the Euler-Poincaré derived index was calculated for every vertebra.
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