Evaluation of the effect of shape on a contemporary CAD system

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The TracerCAD system is one of the leading prosthetic CAD systems in the world and is increasingly used in clinics to replace traditional methods of residual limb shape capture. Accurate dimensional capture of the residuum is arguably the most important process in the production of a prosthetic socket. TracerCAD system accuracy has previously been tested on a cylindrical model but not a trans-tibial shape. Residual limbs are irregular in shape therefore it is important to assess if shape has an effect on the accuracy of data collected when using TracerCAD. The objective of this study is to investigate the accuracy of the TracerCAD system in measuring a model of a trans-tibial stump of known dimensions and volume. A model of a trans-tibial stump was produced and filled with plaster and measured using a data acquisition system with an accuracy of five micron (0.005mm).. The model was repeatedly traced using the TracerCAD system by an individual user. The mean value of measures taken by the dynamic indicator was calculated and compared to individual and mean values of TracerCAD measurement. Results showed that the TracerCAD measurement was not as consistent on the more complex trans-tibial model as for the cylindrical model.
LanguageEnglish
Pages145-154
Number of pages9
JournalProsthetics and Orthotics International
Volume32
Issue number2
DOIs
Publication statusPublished - Jun 2008

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Extremities
Information Systems
Data Accuracy

Keywords

  • shape capture
  • measurement
  • accuracy
  • repeatability

Cite this

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title = "Evaluation of the effect of shape on a contemporary CAD system",
abstract = "The TracerCAD system is one of the leading prosthetic CAD systems in the world and is increasingly used in clinics to replace traditional methods of residual limb shape capture. Accurate dimensional capture of the residuum is arguably the most important process in the production of a prosthetic socket. TracerCAD system accuracy has previously been tested on a cylindrical model but not a trans-tibial shape. Residual limbs are irregular in shape therefore it is important to assess if shape has an effect on the accuracy of data collected when using TracerCAD. The objective of this study is to investigate the accuracy of the TracerCAD system in measuring a model of a trans-tibial stump of known dimensions and volume. A model of a trans-tibial stump was produced and filled with plaster and measured using a data acquisition system with an accuracy of five micron (0.005mm).. The model was repeatedly traced using the TracerCAD system by an individual user. The mean value of measures taken by the dynamic indicator was calculated and compared to individual and mean values of TracerCAD measurement. Results showed that the TracerCAD measurement was not as consistent on the more complex trans-tibial model as for the cylindrical model.",
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Evaluation of the effect of shape on a contemporary CAD system. / McGarry, T.; McHugh, B.F.; Buis, A.; McKay, Geoff.

In: Prosthetics and Orthotics International, Vol. 32, No. 2, 06.2008, p. 145-154.

Research output: Contribution to journalArticle

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