Transparency of TEE3D surface rendering helps to assess the scale of hidden disaster

2021 ◽  
Author(s):  
Piotr Scisło ◽  
Radosław Piątkowski ◽  
Monika Budnik ◽  
Janusz Kochanowski
Keyword(s):  
Surface Rendering

Interactive voxel surface rendering in medical applications

1999 ◽  
Vol 23 (4) ◽  
pp. 193-200 ◽  
Author(s):  
T.-Y. Lee ◽  
T.-L. Weng ◽  
C.-H. Lin ◽  
Y.-N. Sun
Keyword(s):  
Medical Applications ◽  
Surface Rendering

scholarly journals Three-dimensional Sonography in the Assessment of Normal Fetal Anatomy in Late Pregnancy

2010 ◽  
Vol 4 (3) ◽  
pp. 217-231
Author(s):  
Badreldeen Ahmed ◽  
Ulrich Honemeyer
Keyword(s):  
Continuous Wave ◽  
Power Doppler ◽  
Three Dimensional ◽  
Late Pregnancy ◽  
Research Field ◽  
Surface Rendering ◽  
Volume Data ◽  
Data Set ◽  
3D Volume ◽  
Color And Power Doppler

Abstract Three-dimensional, multiplanar sonography, using a volume data set acquired with a 3D probe, has revolutionized ultrasonographic imaging and takes sonographers to a new perception of the fetus in 3 dimensions. Real time scanning, until the late nineties only possible in B-mode, can now be performed in 3D with up to 40 frames/sec. Fetal neurology emerged as a new perinatal research field with the 4D visualization of fetal behavior. Doppler ultrasound, diversified and refined from continuous wave and pulsed Doppler to Color – and Power Doppler, when added to 3D sonography, creates fascinating options of noninvasive fetal vascular mapping (sonoangiography) and vascular assessment of placenta. The diagnostic and demonstrative potential of an acquired 3D volume data set can be maxed with the help of postprocessing and rendering software. After storage, the evaluation of fetal 3D data sets can happen without the patient, with the option of specialist consultation, using telemedicine. In the article, the new 3D “modes” like surface rendering, maximum mode, 3D Color and Power Doppler, STIC, volume rendering, and glass body rendering, are described and illustrated in their display of normal fetal anatomy.

scholarly journals Bottom and Concave Surface Rendering in Image-based Visual Hull

2009 ◽  
Vol 8 (2) ◽  
pp. 39-44
Author(s):  
Jie Feng ◽  
Bencong Song ◽  
Bingfeng Zhou
Keyword(s):  
Efficient Method ◽  
Concave Surface ◽  
Visual Hull ◽  
Surface Rendering ◽  
Lower Side ◽  
Object Surface

Bottom and concave shapes on object surface are difficult to reconstruct in image-based visual hull method. In this paper, we propose a simple but efficient method to solve these problems in regular image-based visual hull framework. With the help of a simple image acquiring platform which involves a glass and a mirror, we can capture images of the object from both upper and lower side at the same time. Using these images, silhouette cones necessary for reconstructing the bottom and the concave surfaces could be generated. Therefore the final rendering result of the object can be significantly improved in accuracy and reality, especially in the parts of bottom and concaves.

6-DOF Haptic Interface for Neurosurgical Simulation System

1999 ◽  
Author(s):  
Takeo Asano ◽  
Hiroshi Matsuzaki ◽  
Akito Saito ◽  
Yukihiko Furuhashi ◽  
Yuichiro Akatsuka ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Three Dimensional ◽  
Image Data ◽  
Simulation System ◽  
Haptic Interface ◽  
Virtual Object ◽  
Virtual Surgery ◽  
Surface Rendering ◽  
Three Dimensional Model ◽  
Head Surface

Abstract Practical use of medical simulation system with virtual reality technology is expected because of the learning of the operation procedure. We have therefore developed a neurosurgical simulation system for minimally invasive surgery. Our system is composed of PC and one or two haptic interfaces. Operator can pick up the region of interest to specify the disease portion from DICOM format image data, then three-dimensional model have made by volume and surface rendering with this data. In the next step, system estimates and indicates on CRT the minimally invasive path from the head surface to the disease target that was picked up beforehand by this system which retains healthy human’s three-dimensional atlas data. Finally, the operator can perform a virtual surgery operation by the haptic interface that has been connected to PC, and can cut off an exact or approximate portion of the disease. The operator can feel the resistance from this virtual object. This operation process can be recorded for medical doctors to review later.

scholarly journals Marching Cubes and Histogram Pyramids for 3D Medical Visualization

2020 ◽  
Vol 6 (9) ◽  
pp. 88
Author(s):  
Porawat Visutsak
Keyword(s):  
Feature Extraction ◽  
Smooth Surface ◽  
3D Model ◽  
Good Choice ◽  
Experimental Results ◽  
Marching Cubes ◽  
Surface Rendering ◽  
Medical Visualization ◽  
Hierarchical Order ◽  
Volumetric Rendering

This paper aims to implement histogram pyramids with marching cubes method for 3D medical volumetric rendering. The histogram pyramids are used for feature extraction by segmenting the image into the hierarchical order like the pyramid shape. The histogram pyramids can decrease the number of sparse matrixes that will occur during voxel manipulation. The important feature of the histogram pyramids is the direction of segments in the image. Then this feature will be used for connecting pixels (2D) to form up voxel (3D) during marching cubes implementation. The proposed method is fast and easy to implement and it also produces a smooth result (compared to the traditional marching cubes technique). The experimental results show the time consuming for generating 3D model can be reduced by 15.59% in average. The paper also shows the comparison between the surface rendering using the traditional marching cubes and the marching cubes with histogram pyramids. Therefore, for the volumetric rendering such as 3D medical models and terrains where a large number of lookups in 3D grids are performed, this method is a particularly good choice for generating the smooth surface of 3D object.

scholarly journals MATEC Web of Conferences – General and efficient algorithms for handling intricate situations in trimmed surface rendering

2018 ◽  
Vol 175 ◽  
pp. 03067
Author(s):  
Luo Bo ◽  
Gang Zhao ◽  
Wei Wang ◽  
Xiaoxiao Du
Keyword(s):  
Efficient Algorithm ◽  
Engineering Industry ◽  
Free Form ◽  
Surface Rendering ◽  
Trimmed Surfaces ◽  
Surface Models ◽  
Practical Engineering ◽  
Cad Cam ◽  
Trimmed Surface ◽  
Free Form Surface

Trimmed surfaces have been widely used in complicated product design in mechanical engineering especially in complex free form surface models of CAD/CAM/CAE. Focusing on the deficiencies of the algorithms available in published literatures when handling some intricate situations, this paper proposes a more general and efficient algorithm of trimmed surface rendering (ATSR). The ATSR is a general algorithm that can deal with most intricate situations, which frequently occur in practical engineering that no special attention has been paid to in references at hand, as well as common situations. Furthermore, this paper presents a new algorithm for the nodes of polygon connecting into elements (ANCE). The ANCE can handle most tricky polygons appearing in the process of rendering and achieve successful triangulation for the to-be-rendered surface. Preferable results are obtained in the case studies, which indicate that the algorithms (ATSR and ANCE) are efficient and effective in handling complicated as well as common trimmed surface models in real engineering industry.

scholarly journals Expression of cbsA Encoding the Collagen-Binding S-Protein of Lactobacillus crispatusJCM5810 in Lactobacillus casei ATCC 393T

2000 ◽  
Vol 182 (23) ◽  
pp. 6857-6861 ◽  
Author(s):  
Beatriz Martı́nez ◽  
Jouko Sillanpää ◽  
Egbert Smit ◽  
Timo K. Korhonen ◽  
Peter H. Pouwels
Keyword(s):  
Cell Wall ◽  
Lactobacillus Casei ◽  
Surface Rendering ◽  
Recombinant Bacteria ◽  
Gene Encoding ◽  
Collagen Binding ◽  
S Protein ◽  
Translational Fusion ◽  
Sorting Signal ◽  
Lactobacillus Crispatus

The cbsA gene encoding the collagen-binding S-layer protein of Lactobacillus crispatus JCM5810 was expressed inL. casei ATCC 393T. The S-protein was not retained on the surface of the recombinant bacteria but was secreted into the medium. By translational fusion of CbsA to the cell wall sorting signal of the proteinase, PrtP, of L. casei, CbsA was presented at the surface, rendering the transformants able to bind to immobilized collagens.

Curved Reconstructions Versus Three-Dimensional Surface Rendering in the Demonstration of Cortical Lesions in Patients with Extratemporal Epilepsy

2001 ◽  
Vol 36 (4) ◽  
pp. 225-233 ◽  
Author(s):  
Linda C. MEINERS ◽  
Jolanda M. SCHEFFERS ◽  
Gerard A. P. DE KORT ◽  
Huib BURGER ◽  
Alexander C. VAN HUFFELEN ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Cortical Lesions ◽  
Surface Rendering ◽  
Dimensional Surface
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