A 3D global-to-local deformable mesh model based registration and anatomy-constrained segmentation method for image guided prostate radiotherapy

2010 ◽  
Vol 37 (3) ◽  
pp. 1298-1308 ◽  
Author(s):  
Jinghao Zhou ◽  
Sung Kim ◽  
Salma Jabbour ◽  
Sharad Goyal ◽  
Bruce Haffty ◽  
...  
Keyword(s):  
Segmentation Method ◽  
Prostate Radiotherapy ◽  
Image Guided ◽  
Model Based ◽  
Mesh Model ◽  
Deformable Mesh

TH-C-304A-05: A Fast Deformable Model Based 3D Registration Algorithm for Image Guided Prostate Radiotherapy

2009 ◽  
Vol 36 (6Part27) ◽  
pp. 2803-2804
Author(s):  
J Zhou ◽  
S Kim ◽  
S Jabbour ◽  
S Goyal ◽  
B Haffty ◽  
...  
Keyword(s):  
Deformable Model ◽  
3D Registration ◽  
Prostate Radiotherapy ◽  
Image Guided ◽  
Registration Algorithm ◽  
Model Based

Normal vector compression of 3D mesh model based on clustering and relative indexing

2004 ◽  
Vol 20 (8) ◽  
pp. 1241-1250
Author(s):  
Deok-Soo Kim ◽  
Youngsong Cho ◽  
Hyun Kim
Keyword(s):  
Normal Vector ◽  
3D Mesh ◽  
Model Based ◽  
Mesh Model ◽  
3D Mesh Model

scholarly journals Local Dynamic Updating Method of Orebody Model Based on Mesh Reconstruction and Mesh Deformation

Minerals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1232
Author(s):  
Zhaopeng Li ◽  
Deyun Zhong ◽  
Zhaohao Wu ◽  
Liguan Wang ◽  
Qiwang Tang
Keyword(s):  
Mesh Deformation ◽  
Local Dynamic ◽  
Geological Interpretation ◽  
Model Based ◽  
Mesh Model ◽  
Model Update ◽  
Geological Information ◽  
Mesh Reconstruction ◽  
Dynamic Updating ◽  
Region Search

In this paper, to update the orebody model based on the given interpreted geological information, we present a local dynamic updating method of the orebody model that allows the interactive construction of the constraint deformation conditions and the dynamic updating of the mesh model. The rules for constructing deformation constraints based on the control polylines are discussed. Because only part of the model is updated, the updated mesh is effective and the overall quality is satisfactory. Our main contribution is that we propose a local dynamic updating method for the orebody model based on mesh reconstruction and mesh deformation. This method can automatically update a given 3D orebody model based on a set of unordered geological interpretation lines. Moreover, we implement a deformation neighborhood region search method based on the specified ring radius and a local constrained mesh deformation algorithm for the orebody model. Finally, we test the method and show the model update results with real geological datasets, which proves that this method is effective for the local updating of orebody models.

scholarly journals Configuration and Evaluation of a Global Unstructured Mesh Model based on the Variable-Resolution Approach

2020 ◽  
Author(s):  
Yihui Zhou ◽  
Yi Zhang ◽  
Jian Li ◽  
Rucong Yu ◽  
Zhuang Liu
Keyword(s):  
Tropical Cyclone ◽  
Transition Zone ◽  
Climate Model ◽  
Model Performance ◽  
Horizontal Resolution ◽  
Fine Scale ◽  
Variable Resolution ◽  
Model Based ◽  
Mesh Model ◽  
Scale Structures

Abstract. Targeting a long-term effort towards a global weather and climate model with a local refinement function, this study systematically configures and evaluates the performance of an unstructured model based on the variable-resolution (VR) approach. Aided by the idealized dry- and moist-atmosphere tests, the model performance is examined in an intermediate degree of complexity. The dry baroclinic wave simulations suggest that the 3D VR-model can reproduce comparable solutions in the refined regions as a fine-resolution quasi-uniform (QU) mesh model, although the global errors increase. The variation of the mesh resolution in the transition zone does not adversely affect the wave pattern. In the coarse-resolution area, the VR model simulates a similar wave distribution to the low-resolution QU model. Two multi-region refinement approaches, including the hierarchical and polycentric refinement modes, further testify the model performance under a more challenging environment. The moist idealized tropical cyclone test further enables us to examine the model ability in terms of resolving fine-scale structures. It is found that the VR model can have the tropical cyclone stably pass the transition zone in various configurations. A series of sensitivity tests examines the model performance in a hierarchical refinement mode, and the solutions exhibit consistency even when the VR mesh is slightly perturbed by one of the three parameters that control the density function. Moreover, only the finest resolution has a dominant impact on the fine-scale structures in the refined region. The tropical cyclone, starting from the 2nd-refinement region and passing through the inner transition zone, gets intensified and possesses a smaller area coverage in the refined regions, as compared to the QU-mesh model that has the same number of grid points. Such variations are consistent with the behavior that one may observe when uniformly refining the QU-mesh model. Besides the horizontal resolution, the intensity of the tropical cyclone is also influenced by the Smagorinsky horizontal diffusion coefficient. The VR model exhibits higher sensitivity in this regard, suggesting the importance of parameter tuning and proper model configurations.

scholarly journals Correction: Image guided dose escalated prostate radiotherapy: still room to improve

2009 ◽  
Vol 4 (1) ◽  
pp. 65 ◽  
Author(s):  
Jarad M Martin ◽  
Andrew Bayley ◽  
Robert Bristow ◽  
Peter Chung ◽  
Mary Gospodarowicz ◽  
...  
Keyword(s):  
Prostate Radiotherapy ◽  
Image Guided
Sign in / Sign up

Export Citation Format

Share Document