scholarly journals Clinical Application of Solid Model Based on Trabecular Tibia Bone CT Images Created by 3D Printer

2015 ◽  
Vol 21 (3) ◽  
pp. 201 ◽  
Author(s):  
Jaemo Cho ◽  
Chan-Soo Park ◽  
Yeoun-Jae Kim ◽  
Kwang Gi Kim
Keyword(s):  
Clinical Application ◽  
Ct Images ◽  
Solid Model ◽  
3D Printer ◽  
Tibia Bone ◽  
Model Based

scholarly journals Reconstruction and finite element analysis of brain hemangioma model based on CT images

2018 ◽  
Vol 1064 ◽  
pp. 012049
Author(s):  
QingFei Jiang ◽  
XueYan Ma ◽  
SiYu Wang ◽  
Kai Yang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Ct Images ◽  
Element Analysis ◽  
Model Based

A new model-based framework for lung tissue segmentation in three-dimensional thoracic CT images

2017 ◽  
Vol 12 (2) ◽  
pp. 339-346 ◽  
Author(s):  
Zeinab Naseri Samaghcheh ◽  
Fatemeh Abdoli ◽  
Hamid Abrishami Moghaddam ◽  
Mohammadreza Modaresi ◽  
Neda Pak
Keyword(s):  
Lung Tissue ◽  
Three Dimensional ◽  
Ct Images ◽  
Tissue Segmentation ◽  
New Model ◽  
Model Based ◽  
Thoracic Ct

Computer Data Structure for Geological Entities Modelling Based on OO-Solid Model

2011 ◽  
Vol 383-390 ◽  
pp. 2484-2491
Author(s):  
Jun Fan
Keyword(s):  
Data Structure ◽  
Data Model ◽  
Object Oriented ◽  
Geological Structure ◽  
Solid Model ◽  
Topological Relations ◽  
Seamless Integration ◽  
Computer Data ◽  
Model Based ◽  
Geometric Primitives

In the long evolution of the earth formation often form a complex geological structure, modeling for these complex geological entities (such as thinning-out, bifurcation, reverse, etc.) still require in-depth 3D modeling study. Because of discontinuity, complexity and uncertainty of distribution of 3D geo-objects, some models only are suitable for regular, continuous and relatively simple spatial objects, and some are suitable for discontinue, complex and uncertain geo-objects, but some improvements on these models, such as, updating of model, maintenance of topological and seamless integration between models, are still to be made. OO-Solid model, put forward by writer in 2002, is an object- oriented topological model based on sections. The OO-Solid Model is an object-oriented 3D topologic data model based on component for geology modeling with fully considering the topological relations between geological objects and its geometric primitives, Comparatively, it accords with the actual requirements of three-dimensional geological modeling . The key issue of 3D geology modeling is the 3D data model. Some data models are suitable for discontinue, complex and uncertain geo-objects, but the OO-Solid model is an object-oriented 3D topologic data model based on component for geology modeling with fully considering the topological relations between geological objects and its geometric primitives. OO-Solid model and data structure are designed. At last, 3D complex geological entities modeling based on OO-Solid are studied in this paper. These study is important and one of the core techniques for the 3DGM.

Improved accuracy of an FDM 3D printer using a face-diagonal length test using an artifact and a Vernier caliper

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Seung-Han Yang ◽  
Kwang-Il Lee
Keyword(s):  
Fused Deposition Modeling ◽  
3D Printer ◽  
Geometric Errors ◽  
Content Type ◽  
Fused Deposition ◽  
Model Based ◽  
The Face ◽  
Deposition Modeling ◽  
Measuring Machine ◽  
Diagonal Length

Purpose The purpose of this study is to improve the accuracy of a fused deposition modeling three-dimensional (3D) printer by identifying and compensating for position-independent geometric errors using a face-diagonal length test featuring a designed artifact and a Vernier caliper. Design/methodology/approach An artifact that does not require support when printing was designed and printed to allow performance of the face-diagonal length test. A Vernier caliper was used to measure the lengths of diagonals in the XY, YZ and ZX planes of the printed artifact specimen; this completed the face-diagonal length test. The relationships between position-independent geometric errors of the linear axes X, Y and Z and the measured diagonal lengths of the three planes were determined to identify geometric errors. Findings The approach was applied to a commercial fused deposition modeling 3D printer, and three position-independent geometric errors were rapidly identified. The artifact was re-printed after model-based compensation for these errors and the diagonal lengths were re-measured. The results were verified via coordinate measuring machine measurement of a simple test piece without and with model-based compensation for identified geometric errors. Furthermore, the proposed approach was applied to a commercial 3D printer. Research limitations/implications The measured diagonal lengths of the printed artifacts varied greatly. Thus, further studies should investigate the effects of printing materials and parameters on the length discrepancies of 3D printed artifacts. Practical implications A software-based compensation of identified position-independent geometric errors has to be used at commercial 3D printers for accuracy improvements of printed parts. Originality/value Thus, the approach is of practical utility; it can be periodically used to identify position-independent geometric errors and ensure that the 3D printer is consistently accurate.

The initial VTM model based on pre-chemo CT and PET-CT images is showed in its digital design, preliminary to PLA anatomic replica creation and subsequent prosthesis graphic design

ASVIDE ◽  
2020 ◽  
Vol 7 ◽  
pp. 244-244
Author(s):  
Jacopo Vannucci ◽  
Elisa Scarnecchia ◽  
Rossella Potenza ◽  
Silvia Ceccarelli ◽  
Donato Monopoli Monopoli ◽  
...  
Keyword(s):  
Graphic Design ◽  
Ct Images ◽  
Digital Design ◽  
Model Based ◽  
Pet Ct

scholarly journals Tissue-specific transformation model for CT-images

2017 ◽  
Vol 3 (2) ◽  
pp. 525-528
Author(s):  
Kathrin Bartelheimer ◽  
Hendrik Teske ◽  
Rolf Bendl ◽  
Kristina Giske
Keyword(s):  
Ct Images ◽  
Tissue Growth ◽  
Transformation Model ◽  
Deformation Analysis ◽  
Skeleton Model ◽  
Volume Calculation ◽  
Model Based ◽  
The Impact ◽  
Model Characteristic ◽  
Insight Into

AbstractDuring radiotherapy, posture changes and volume changing deformations like growing or shrinking tissue result in anatomical deformations. The basis for investigating the impact of such deformations on dose uncertainties, are model-based tools for deformation analysis. In this context, we propose a transformation model based on the information of CT-images, which allows an on-the-fly calculation of voxel volumes. Our model is based on the concept of the chainmail algorithm and describes deformation on voxel-level. With an exemplary input of a set of landmark pairs, generated by a kinematic head-and-neck skeleton model, CT-images (512x512x126 voxel) can be deformed with an on-the-fly volume calculation in less than 70s. The volume calculation delivers insight into model-characteristic volume changes and is a prerequisite for implementing tissue growth and shrinkage.

7H24 Proposal of rib cage motion model based on anatomical knowledge and patient-specific CT images.

2012 ◽  
Vol 2012.24 (0) ◽  
pp. _7H24-1_-_7H24-2_
Author(s):  
Hirotaka ITO ◽  
Seiichi KOSHIZUKA ◽  
Akihiro HAGA ◽  
Ryosaku SHINO ◽  
Keiichi NAKAGAWA
Keyword(s):  
Ct Images ◽  
Patient Specific ◽  
Motion Model ◽  
Rib Cage ◽  
Model Based ◽  
Anatomical Knowledge

Automated Lung Nodule Segmentation Using an Active Contour Model Based on PET/CT Images

2015 ◽  
Vol 12 (8) ◽  
pp. 1972-1976 ◽  
Author(s):  
Yan Qiang ◽  
Xiaohui Zhang ◽  
Guohua Ji ◽  
Juanjuan Zhao
Keyword(s):  
Active Contour ◽  
Active Contour Model ◽  
Lung Nodule ◽  
Ct Images ◽  
Model Based ◽  
Contour Model ◽  
Pet Ct
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