scholarly journals A novel method for volumetric assessment of tooth wear using three-dimensional reverse-engineering technology: A preliminary report

2014 ◽  
Vol 84 (4) ◽  
pp. 687-692 ◽  
Author(s):  
Jina Park ◽  
Dong-Soon Choi ◽  
Insan Jang ◽  
Hyun-Tae Yook ◽  
Paul-Georg Jost-Brinkmann ◽  
...  
Keyword(s):  
Reverse Engineering ◽  
Preliminary Report ◽  
Three Dimensional ◽  
Tooth Wear ◽  
Engineering Technology ◽  
Volumetric Assessment ◽  
Novel Method

scholarly journals Measuring Differential Volume Using the Subtraction Tool for Three-Dimensional Breast Volumetry: A Proof of Concept Study

2020 ◽  
pp. 155335062094556
Author(s):  
Faith Hyun Kyung Jeon ◽  
Michelle Griffin ◽  
Aurora Almadori ◽  
Jajini Varghese ◽  
Stephanie Bogan ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Computer Software ◽  
Patient Positioning ◽  
Volumetric Analysis ◽  
Volumetric Assessment ◽  
Alternative Approach ◽  
Significant Difference ◽  
Actual Volume ◽  
Novel Method ◽  
The Subject

Background. Three-dimensional (3D) photography provides a promising means of breast volumetry. Sources of error using a single-captured surface to calculate breast volume include inaccurate designation of breast boundaries and prediction of the invisible chest wall generated by computer software. An alternative approach is to measure differential volume using subtraction of 2 captured surfaces. Objectives. To explore 3D breast volumetry using the subtraction of superimposed images to calculate differential volume. To assess optimal patient positioning for accurate volumetric assessment. Methods. Known volumes of breast enhancers simulated volumetric changes to the breast (n = 12). 3D photographs were taken (3dMDtorso) with the subject positioned upright at 90° and posteriorly inclined at 30°. Patient position, breathing, distance and camera calibration were standardised. Volumetric analysis was performed using 3dMDvultus software. Results. A statistically significant difference was found between actual volume and measured volumes with subjects positioned at 90° ( P < .05). No statistical difference was found at 30° ( P = .078), but subsequent Bland–Altman analysis showed evidence of proportional bias ( P < .05). There was good correlation between measured and actual volumes in both positions (r = .77 and r = .85, respectively). Univariate analyses showed breast enhancer volumes of 195 mL and 295 mL to incur bias. The coefficient of variation was 5.76% for single observer analysis. Conclusion. Positioning the subject at a 30° posterior incline provides more accurate results from better exposure of the inferior breast. The subtraction tool is a novel method of measuring differential volume. Future studies should explore methodology for application into the clinical setting.

scholarly journals Analysis of tooth movement in extraction cases using three-dimensional reverse engineering technology

2007 ◽  
Vol 29 (4) ◽  
pp. 325-331 ◽  
Author(s):  
B. K. Cha ◽  
J. Y. Lee ◽  
P.-G. Jost-Brinkmann ◽  
N. Yoshida
Keyword(s):  
Reverse Engineering ◽  
Tooth Movement ◽  
Three Dimensional ◽  
Engineering Technology

Modeling Design and Rapid Prototyping Manufacture of Cream Bottle Based on Handheld Laser Scanning

2015 ◽  
Vol 752-753 ◽  
pp. 1301-1306 ◽  
Author(s):  
Xing Xing Wang ◽  
Jin Dong Wei ◽  
Yi Pei ◽  
Yu Zhu ◽  
Hong Jun Ni
Keyword(s):  
Rapid Prototyping ◽  
Reverse Engineering ◽  
Laser Scanning ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Engineering Technology ◽  
Cloud Data ◽  
Improve Efficiency

Reverse Engineering (RE) and Rapid Prototyping (RP) were used for manufacturing cream bottle. Points cloud data of cream bottle was accessed by handheld laser scanner firstly. Then, points cloud data was handed by Imageware software and the three-dimensional model was formed by Solidworks software. Finally, the entity model was manufacturing by RP machine. In the research, rapid prototyping was combined with reverse engineering technology, manufacturing cycle was shorten, production requirements, improve efficiency and other advantages were met.

Three-Dimensional Geometrical Modelling of Wild Boar Head by Reverse Engineering Technology

2008 ◽  
Vol 5 (1) ◽  
pp. 85-90 ◽  
Author(s):  
Liang Xu ◽  
Min-xu Lin ◽  
Jian-qiao Li ◽  
Zhao-liang Wang ◽  
B. Chirende
Keyword(s):  
Reverse Engineering ◽  
Wild Boar ◽  
Three Dimensional ◽  
Engineering Technology ◽  
Geometrical Modelling

Research of Three-Dimensional Geometrical Modeling Based on the Reverse Engineering

2011 ◽  
Vol 211-212 ◽  
pp. 1100-1104
Author(s):  
Hong Jiang ◽  
Wen Lei Sun ◽  
Yong Fang Shi ◽  
Yan Hua Huang
Keyword(s):  
Reverse Engineering ◽  
Three Dimensional ◽  
Data Gathering ◽  
New Product ◽  
Curved Surface ◽  
Digital Measurement ◽  
Engineering Technology ◽  
Cloud Data ◽  
Cloud Data Processing ◽  
D Model

This paper introduces the basic conception of the reverse engineering, process of digital measurement and 3-D modeling method based RE technology: one is based on point-curve-curved surface reconstruction, and the other is based on point-curved surface fitting directly. According to the first method, the processes of data gathering, cloud data processing and 3-D model rebuilding are introduced through reconstructing the 3-D models of the gauge board and left board in Imageware and UGNX. Using the reverse engineering technology in product design will shorten the period of developing a new product and accelerate it’s response to the market.

The Modeling Design of Plastic Ashtray Technology and Rapid Prototyping Technology Based on Reverse Engineering

2014 ◽  
Vol 889-890 ◽  
pp. 9-13
Author(s):  
Zhi Yang Li ◽  
Xiao Mei Wang ◽  
Yu Zhu ◽  
Ming Yu Huang ◽  
Hong Jun Ni
Keyword(s):  
Rapid Prototyping ◽  
Reverse Engineering ◽  
Geometric Modeling ◽  
Three Dimensional ◽  
Coordinate Measuring Machine ◽  
Production Costs ◽  
Production Cycle ◽  
Engineering Technology ◽  
Surface Data ◽  
Measuring Machine

Reverse engineering is a process of using 3D geometric modeling method to reconstruct actual objects CAD model based on these points, which is used physical digital measuring equipment to measure the three-dimensional coordinates of points on the surface of the object accurately and rapidly. Based on reverse engineering technology as the theoretical basis, the paper used three-coordinate measuring machine to measure ashtray surface data. After data was be handled, which was used to reconstruct 3D entity in Pro/E software. Last, the 3D entity of ashtray was printed out through rapid prototyping machine, which can be achieved by physical sample to rapid manufacturing of products, shortening production cycle, reducing production costs.

Point Cloud Data Acquisition Based on Reverse Engineering Technology

2012 ◽  
Vol 159 ◽  
pp. 186-190 ◽  
Author(s):  
Xian Sheng Ran ◽  
Li Lin ◽  
Han Bing Wei
Keyword(s):  
Reverse Engineering ◽  
Data Acquisition ◽  
Point Cloud ◽  
Three Dimensional ◽  
Point Cloud Data ◽  
Engineering Technology ◽  
Cloud Data ◽  
Cloud Processing ◽  
Optical Scanner ◽  
Point Cloud Processing

A reverse engineering based point cloud data acquisition method is addressed. The most critical part of reverse engineering (RE) is data acquisition of the digital model, the quality of design is determined by point cloud data acquisition, which is related to the accuracy of design. The measurement of relative position of different parts has been a difficulty of data acquisition. In this paper, the ATOS optical scanner was used as an example to illustrate the principle of three-dimensional scanner, the positioning methods and procedure of point cloud processing. A case study of point cloud data acquisition of car body was used to illustrate three-point positioning principle, which improves the accuracy of measurement compare with traditional method.

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