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micro-computed-tomography
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Design and Implementation of a Software and Control Unit for a Cone-beam CT scan with Capability of the Quantificaion of Images
, M.Sc. Thesis Sharif University of Technology ; Boroushaki, Mehrdad (Supervisor) ; Kamali Asl, Alireza (Supervisor)
Abstract
High-resolution computed tomography (CT) or micro-CT is the preclinical equivalent of CT and is largely used to study small-animal models of human disease. The translation of clinical imaging methods from human to rodents presents scaling challenges for all modalities including micro-CT. Generally, tomography imaging systems include X-ray tube, detector, electrical and mechanical circuits for rotating system and main processing system which should be able to data acquisitioning, data reconstructing and represent user friendly interface. Exposure time, tube current, number of projections, detector and tube distance should be control by processing system, since final images quality and...
Evolution of pore-scale morphology of oil shale during pyrolysis: a quantitative analysis
, Article Transport in Porous Media ; Volume 119, Issue 1 , 2017 , Pages 143-162 ; 01693913 (ISSN) ; Baychev, T. G ; Ayatollahi, S ; Jivkov, A. P ; Sharif University of Technology
Abstract
Changes of morphological parameters of oil shale under thermal conditions are investigated. Analyses are based on 26 micro-computed tomography (micro-CT) images of Green River immature shale rock available under creative commons license. Several image processing and characterization algorithms are applied to sequential high-resolution micro-CT images of oil shale samples undergoing pyrolysis. Pore-scale morphology is extracted and quantified, providing results for pore size, throat size, grain size, specific surface, coordination number, and fracture aperture. The results demonstrate critical increases of porosity, coordination number and fracture aperture in the temperature range from 390...
Genetic algorithm-based pore network extraction from micro-computed tomography images
, Article Chemical Engineering Science ; Volume 92 , 2013 , Pages 157-166 ; 00092509 (ISSN) ; Jamshidi, S ; Iglauer, S ; Boozarjomehry, R ; Sharif University of Technology
2013
Abstract
A genetic-based pore network extraction method from micro-computed tomography (micro-CT) images is proposed in this paper. Several variables such as the number, radius and location of pores, the coordination number, as well as the radius and length of the throats are used herein as the optimization parameters. Two approaches to generate the pore network structure are presented. Unlike previous algorithms, the presented approaches are directly based on minimizing the error between the extracted network and the real porous medium. This leads to the generation of more accurate results while reducing required computational memories. Two different objective functions are used in building the...
Polymer/metal composite 3D porous bone tissue engineering scaffolds fabricated by additive manufacturing techniques: A review
, Article Bioprinting ; Volume 25 , 2022 ; 24058866 (ISSN) ; Bakhshi, R ; Alizadeh, R ; Sharif University of Technology
Elsevier B.V
2022
Abstract
The employment of tissue engineering scaffolds in the reconstruction of the damaged bone tissues has shown remarkable promise since they significantly facilitate the healing process. Fabrication of highly porous biocompatible scaffolds with sufficient mechanical strength is still challenging. In this regard, polymers have been widely utilized to construct three-dimensional (3D) porous scaffolds due to their excellent processability and biocompatibility. However, insufficient mechanical strength and inappropriate degradation rate of the monophasic polymer scaffolds in the bone regeneration process, as the main challenges, limit their extensive clinical application. The incorporation of...