Accuracy of medical RP models

Abstract

PurposeThe purpose of this paper is to generate facsimiled rapid prototyping (RP) models for medical analysis that demands an answer about the accuracy of medical models.Design/methodology/approachThe RP technology for anatomical biomodeling is the accurate RP procedure of milling and joining, a method that is used to produce high accurate functional prototypes. To fabricate medical prototypes with RP, there is a need to get appropriate data information. Along that process, image data will be taken by computer‐tomography (CT) images as data basis. The key process is to generate a digital three‐dimensional (3D) model that represents the original object as best as possible. To be able to make a statement about the accuracy of such a model the necessary parameters run along a CT scan are of interest.FindingsA case study using a generated test model is presented in order to show the process accuracy in relation to the chosen scan parameters. The quality of editing CT images for a 3D‐reconstruction as a necessary pre‐process for RP is, to an important degree, based on the used scan parameters.Originality/valueThis paper represents a cutting‐edge analysis that gives answers about the constrictive accuracy that is achievable for medical RP models.

Assessment of Dimensional Integrity and Spatial Defect Localization in Additive Manufacturing Using Spectral Graph Theory

“…This difficulty in quantifying geometric integrity of the AM components has also concerned other researchers (see, e.g., Refs. [8][9][10][11][12][13][14]).…”

Estereolitografía en Odontología: Revisión bibliográfica

“…determinaron la validez y reproductibilidad de las medidas dentarias y segmentos de arcos dentarios en modelos obtenidos por estereolitografía y por scanner intraoral. Se estableció que los modelos obtenidos por ambos métodos son válidos y reproducibles para medir distancias en una dentición [13][14][15][16][17][18] .…”

Error compensation method for improving the accuracy of biomodels obtained from CBCT data

“…Due to the importance of accuracy in the biomodels used in medical applications, several methods have been developed for evaluating geometrical errors in the models manufactured using RP and therefore for evaluating whether the STL or manufactured model is valid for a specific application. Most of the methods evaluate the error of the model by comparing distances between landmarks defined on the object and reproduced in the model [21,[30][31][32][33]. In the review by Rossini et al [34], a review of measurement techniques, accuracy analysis, and reproducibility is presented.…”

“…In addition to the aforementioned applications, the usage of the RP technology is also being studied and developed in the fields of biology and tissue engineering, fundamentally in structure fabrication for tissue growth and encapsulations for microfluidic devices [13][14][15]. Originally CT [16,17] was only used for diagnosis, but improvements in the accuracy of the machines and increases in the processing power of conventional computers have expanded the use of CT for the accurate measurement of geometries in both medical and industrial fields [18][19][20][21]. The result is a 3D volume with the density of each point of the selected tissue.…”