scholarly journals The use of transport and diffusion equations in the three-dimensional reconstruction of computerized tomographic images

2012 ◽  
Keyword(s):  
Three Dimensional ◽  
Diffusion Equations ◽  
Three Dimensional Reconstruction ◽  
Tomographic Images ◽  
Dimensional Reconstruction ◽  
Transport And Diffusion ◽  
And Diffusion

Three-Dimensional Reconstruction of the Carpus form Computerized Tomographic Images

1991 ◽  
Vol 26 (5) ◽  
pp. 1552
Author(s):  
Kyu Hyun Yang ◽  
E. S. Kang ◽  
H. W. Park ◽  
S. S. Chung ◽  
S. H. Kim ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Three Dimensional Reconstruction ◽  
Tomographic Images ◽  
Dimensional Reconstruction

scholarly journals Comparative Analysis of Object Digitization Techniques Applied to the Characterization of Deformed Materials in Ballistic Tests

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5017
Author(s):  
Filipe Dmengeon Pedreiro Balbino ◽  
Khrissy Aracélly Reis Medeiros ◽  
Carlos Roberto Hall Barbosa
Keyword(s):  
Comparative Analysis ◽  
Three Dimensional ◽  
Three Dimensional Reconstruction ◽  
Optical Scanning ◽  
Structured Light Scanner ◽  
Dimensional Reconstruction ◽  
Random Sample Consensus ◽  
Ballistic Tests ◽  
And Diffusion

Several three-dimensional scanning methods have been developed and improved over the past 40 years. The peculiarities of each technique, associated with the computational advances of the period, allowed the increasing application and diffusion of the technology in several sectors, among them those related to metrology in ballistics and the testing of protective materials. The specific goal of such ballistic tests is to estimate the depth of indentation caused by projectiles. In particular, this study presents a comparative analysis between two three-dimensional optical scanning methods, taking into account the same object of interest. The comparative analysis was based on reference planes detected by Random Sample Consensus methodology in each cloud. By comparing the results of the different techniques, it was found for this case that three-dimensional reconstruction by stereo images estimated values closer to the real ones in comparison to those estimated by the structured light scanner, mainly due to the fact that, for three-dimensional reconstruction, the image acquisition was conducted statically.

scholarly journals Quantitative Analysis of the Cochlea using Three-Dimensional Reconstruction based on Microcomputed Tomographic Images

2013 ◽  
Vol 296 (7) ◽  
pp. 1083-1088 ◽  
Author(s):  
Kang-Jae Shin ◽  
Ju-Young Lee ◽  
Jeong-Nam Kim ◽  
Ja-Young Yoo ◽  
Chuog Shin ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Three Dimensional ◽  
Three Dimensional Reconstruction ◽  
Tomographic Images ◽  
Dimensional Reconstruction

Methods for three-dimensional reconstruction of cellular components within a thick section

1986 ◽  
Vol 44 ◽  
pp. 18-21
Author(s):  
J. Frank ◽  
B. F. McEwen ◽  
M. Radermacher ◽  
C. L. Rieder
Keyword(s):  
Tilt Angle ◽  
Tomographic Reconstruction ◽  
3D Structure ◽  
Three Dimensional ◽  
Thick Section ◽  
Three Dimensional Reconstruction ◽  
Axis Ratio ◽  
Dimensional Reconstruction ◽  
Cellular Components

The tomographic reconstruction from multiple projections of cellular components, within a thick section, offers a way of visualizing and quantifying their three-dimensional (3D) structure. However, asymmetric objects require as many views from the widest tilt range as possible; otherwise the reconstruction may be uninterpretable. Even if not for geometric obstructions, the increasing pathway of electrons, as the tilt angle is increased, poses the ultimate upper limitation to the projection range. With the maximum tilt angle being fixed, the only way to improve the faithfulness of the reconstruction is by changing the mode of the tilting from single-axis to conical; a point within the object projected with a tilt angle of 60° and a full 360° azimuthal range is then reconstructed as a slightly elliptic (axis ratio 1.2 : 1) sphere.

Three-Dimensional Reconstruction of Native Androctonus Australis Hemocyanin

1990 ◽  
Vol 48 (1) ◽  
pp. 452-453
Author(s):  
Nicolas Boisset ◽  
Jean-Christophe Taveau ◽  
Jean Lamy ◽  
Terence Wagenknecht ◽  
Michael Radermacher ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Solid Body ◽  
Body Surface ◽  
Three Dimensional ◽  
Staining Technique ◽  
Three Dimensional Reconstruction ◽  
Dimensional Reconstruction ◽  
View Reconstruction ◽  
Surface Representations ◽  
Top View

Hemocyanin, the respiratory pigment of the scorpion Androctonus australis is composed of 24 kidney shaped subunits. A model of architecture supported by many indirect arguments has been deduced from electron microscopy (EM) and immuno-EM. To ascertain, the disposition of the subunits within the oligomer, the 24mer was submitted to three-dimensional reconstruction by the method of single-exposure random-conical tilt series.A sample of native hemocyanin, prepared with the double layer negative staining technique, was observed by transmisson electron microscopy under low-dose conditions. Six 3D-reconstructions were carried out indenpendently from top, side and 45°views. The results are composed of solid-body surface representations, and slices extracted from the reconstruction volume.The main two characters of the molecule previously reported by Van Heel and Frank, were constantly found in the solid-body surface representations. These features are the presence of two different faces called flip and flop and a rocking of the molecule around an axis passing through diagonnally opposed hexamers. Furthermore, in the solid-body surface of the top view reconstruction, the positions and orientations of the bridges connecting the half molecules were found in excellent agreement with those predicted by the model.

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