Search
  Advanced Search
 
Journal search
Journal cover: Rapid Prototyping Journal

Rapid Prototyping Journal

ISSN: 1355-2546

Online from: 1995

Subject Area: Mechanical & Materials Engineering

Content: Latest Issue | icon: RSS Latest Issue RSS | Previous Issues

 

Icon: .Table of Contents.Icon: .

Quantitative assessments of geometric errors for rapid prototyping in medical applications


Document Information:
Title:Quantitative assessments of geometric errors for rapid prototyping in medical applications
Author(s):Cristobal Arrieta, (Department of Electrical Engineering and Biomedical Imaging Center, Pontificia Universidad Catolica de Chile, Santiago, Chile), Sergio Uribe, (Biomedical Imaging Center and Radiology Department, Pontificia Universidad Catolica de Chile, Santiago, Chile), Jorge Ramos-Grez, (Department of Mechanical and Metallurgical Engineering, Pontificia Universidad Catolica de Chile, Santiago, Chile), Alex Vargas, (Department of Surgery, Pontificia Universidad Catolica de Chile, Santiago, Chile), Pablo Irarrazaval, (Department of Electrical Engineering and Biomedical Imaging Center, Pontificia Universidad Catolica de Chile, Santiago, Chile), Vicente Parot, (Department of Electrical Engineering and Biomedical Imaging Center, Pontificia Universidad Catolica de Chile, Santiago, Chile), Cristian Tejos, (Department of Electrical Engineering and Biomedical Imaging Center, Pontificia Universidad Catolica de Chile, Santiago, Chile)
Citation:Cristobal Arrieta, Sergio Uribe, Jorge Ramos-Grez, Alex Vargas, Pablo Irarrazaval, Vicente Parot, Cristian Tejos, (2012) "Quantitative assessments of geometric errors for rapid prototyping in medical applications", Rapid Prototyping Journal, Vol. 18 Iss: 6, pp.431 - 442
Keywords:Geometric accuracy, Image processing, Rapid prototyping, Volume measurement, Volumetric accuracy indexes
Article type:Research paper
DOI:10.1108/13552541211271974 (Permanent URL)
Publisher:Emerald Group Publishing Limited
Acknowledgements:This work has been supported by Fondecyt 1100864, Anillo ACT79 and Fondef D06I 1026.
Abstract:

Purpose – In medical applications, it is crucial to evaluate the geometric accuracy of rapid prototyping (RP) models. Current research on evaluating geometric accuracy has focused on identifying two or more specific anatomical landmarks on the original structure and the RP model, and comparing their corresponding linear distances. Such kind of accuracy metrics is ambiguous and may induce misrepresentations of the actual errors. The purpose of this paper is to propose an alternative method and metrics to measure the accuracy of RP models.

Design/methodology/approach – The authors propose an accuracy metric composed of two different approaches: a global accuracy evaluation using volumetric intersection indexes calculated over segmented Computed Tomography scans of the original object and the RP model. Second, a local error metric that is computed from the surfaces of the original object and the RP model. This local error is rendered in a 3D surface using a color code, that allow differentiating regions where the model is overestimated, underestimated, or correctly estimated. Global and local error measurements are performed after rigid body registration, segmentation and triangulation.

Findings – The results show that the method can be applied to different objects without any modification, and provide simple, meaningful and precise quantitative indexes to measure the geometric accuracy of RP models.

Originality/value – The paper presents a new approach to characterize the geometric errors in RP models using global indexes and a local surface distribution of the errors. It requires minimum human intervention and it can be applied without any modification to any kind of object.



Fulltext Options:

Login

Login

Existing customers: login
to access this document

Login


- Forgot password?
- Athens/Institutional login

Purchase

Purchase

Downloadable; Printable; Owned
HTML, PDF (502kb)

Due to our platform migration, pay-per-view is temporarily unavailable.

To purchase this item please login or register.

Login


- Forgot password?

Recommend to your librarian

Complete and print this form to request this document from your librarian


Marked list


Bookmark & share

Reprints & permissions