Eye3DVas: three-dimensional reconstruction of retinal vascular structures by integrating fundus image features

2020 ◽  
Author(s):  
Zhaomin Yao ◽  
Kunlin He ◽  
Huahui Zhou ◽  
Zhenyu Zhang ◽  
Gancheng Zhu ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Image Features ◽  
Fundus Image ◽  
Three Dimensional Reconstruction ◽  
Dimensional Reconstruction ◽  
Vascular Structures

scholarly journals Computer-assisted spatial reconstruction of cerebral blood vessels and intracranial aneurysms

2006 ◽  
Vol 59 (1-2) ◽  
pp. 24-27 ◽  
Author(s):  
Igor Nikolic
Keyword(s):  
Three Dimensional ◽  
Cerebral Aneurysms ◽  
Carotid Bifurcation ◽  
Computer Assisted ◽  
Three Dimensional Reconstruction ◽  
Conventional Angiography ◽  
Spatial Reconstruction ◽  
Dimensional Reconstruction ◽  
Vascular Structures ◽  
Carotid Aneurysms

Introduction. Today, many medical procedures are based on image analysis with the aim of providing accurate diagnosis and optimal treatment. The goal of this report was to present clinical implications of computer-assisted geometric design of carotid aneurysms. Material and methods. In this study, the three-dimensional reconstruction was based on the approximation power of the parametric spline function, which achieves interpolation and surface fitting of the arterial information obtained by conventional angiography. Two views of conventional angiograms (anterioposterior and lateral views) were used with a personal computer and commercial software. Results. This method of three-dimensional generated images was applied in 45 cases of cerebral aneurysms in carotid bifurcation. 3D reconstructions were made in approximately 20 minutes. They contributed to assessing vascular structures, and it was possible to rotate the three-dimensional image in different angles. Conclusion. Three-dimensional reconstruction of cerebral vessels is very useful for discussing surgical strategies preoperatively. Furthermore, it could also be used in endovascular procedures. .

Three-Dimensional Reconstruction of the Power Flow Doppler Imaging of Intracranial Vascular Structures in the Neonate

1998 ◽  
Vol 8 (2) ◽  
pp. 94-96 ◽  
Author(s):  
Takashi Hayashi ◽  
Takashi Ichiyama ◽  
Miki Nishikawa ◽  
Junko Kaneko ◽  
Kanae Nakashima ◽  
...  
Keyword(s):  
Power Flow ◽  
Three Dimensional ◽  
Doppler Imaging ◽  
Three Dimensional Reconstruction ◽  
Dimensional Reconstruction ◽  
Vascular Structures

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.

Three-Dimensional Reconstruction of Two Forms of the Chaperonin GRO EL

1990 ◽  
Vol 48 (1) ◽  
pp. 258-259
Author(s):  
J.L. Carrascosa ◽  
G. Abella ◽  
S. Marco ◽  
M. Muyal ◽  
J.M. Carazo
Keyword(s):  
Three Dimensional ◽  
The Other ◽  
Two Dimensional ◽  
Series Method ◽  
Three Dimensional Reconstruction ◽  
Structural Components ◽  
E Coli ◽  
Dimensional Reconstruction ◽  
Morphogenetic Factors ◽  
Tilt Series

Chaperonins are a class of proteins characterized by their role as morphogenetic factors. They trantsiently interact with the structural components of certain biological aggregates (viruses, enzymes etc), promoting their correct folding, assembly and, eventually transport. The groEL factor from E. coli is a conspicuous member of the chaperonins, as it promotes the assembly and morphogenesis of bacterial oligomers and/viral structures.We have studied groEL-like factors from two different bacteria:E. coli and B.subtilis. These factors share common morphological features , showing two different views: one is 6-fold, while the other shows 7 morphological units. There is also a correlation between the presence of a dominant 6-fold view and the fact of both bacteria been grown at low temperature (32°C), while the 7-fold is the main view at higher temperatures (42°C). As the two-dimensional projections of groEL were difficult to interprete, we studied their three-dimensional reconstruction by the random conical tilt series method from negatively stained particles.

247: Three Dimensional Reconstruction of Nervature in Prostate: Confirming Cancer Related Axonogenesis

2006 ◽  
Vol 175 (4S) ◽  
pp. 82-82
Author(s):  
Gustavo Ayala ◽  
Rile Li ◽  
Hong Oai ◽  
Mohammad Sayeeddudin ◽  
Timothy C. Thompson ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Three Dimensional Reconstruction ◽  
Dimensional Reconstruction
Sign in / Sign up

Export Citation Format

Share Document