ABSTRACTModels of the human respiratory tract developed in the past were based on measurements ma... more ABSTRACTModels of the human respiratory tract developed in the past were based on measurements made on human tracheobronchial airways of healthy subjects. With the exception of a few morphometric characteristics such as the bronchial wall thickness (WT), very little has been published concerning the effects of disease on the tree structure and geometrical features. In this study, a commercial software package was used to segment the airway tree of seven healthy and six moderately persistent asthmatic patients from high resolution computed tomography images. The process was assessed with regards to the treatment of the images of the asthmatic group. The in vivo results for the bronchial length, diameter, WT, branching, and rotation angles are reported and compared per generation for different lobes. Furthermore, some popular mathematical relationships between these morphometric characteristics were examined in order to verify their validity for both groups. Our results suggest that, ...
This paper presents two aspects of the environmental impact of waste generated from wood. The fir... more This paper presents two aspects of the environmental impact of waste generated from wood. The first part shows the effects caused by improper waste disposal. The second part shows the effects generated by turning waste into furniture industry to make products from particleboard and MDF.
ABSTRACTModels of the human respiratory tract developed in the past were based on measurements ma... more ABSTRACTModels of the human respiratory tract developed in the past were based on measurements made on human tracheobronchial airways of healthy subjects. With the exception of a few morphometric characteristics such as the bronchial wall thickness (WT), very little has been published concerning the effects of disease on the tree structure and geometrical features. In this study, a commercial software package was used to segment the airway tree of seven healthy and six moderately persistent asthmatic patients from high resolution computed tomography images. The process was assessed with regards to the treatment of the images of the asthmatic group. The in vivo results for the bronchial length, diameter, WT, branching, and rotation angles are reported and compared per generation for different lobes. Furthermore, some popular mathematical relationships between these morphometric characteristics were examined in order to verify their validity for both groups. Our results suggest that, ...
This paper presents two aspects of the environmental impact of waste generated from wood. The fir... more This paper presents two aspects of the environmental impact of waste generated from wood. The first part shows the effects caused by improper waste disposal. The second part shows the effects generated by turning waste into furniture industry to make products from particleboard and MDF.
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Papers by C. Dubau