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52. Jahrestagung der Deutschen Gesellschaft für Plastische und Wiederherstellungschirurgie (DGPW)

Deutsche Gesellschaft für Plastische und Wiederherstellungschirurgie e. V.

10.10. - 11.10.2014, Leipzig

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Linear Accuracy and Reliability of Volume Data Sets Acquired by Two CBCT-Devices and a MSCT using Virtual Models – A Comparative in-vitro Study

Meeting Abstract

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  • presenting/speaker Johannes Wikner - Universitätsklinikum Hamburg-Eppendorf, Mund-, Kiefer- und Gesichtschirurgie, Hamburg, Deutschland
  • Henning Hanken - Universitätsklinikum Hamburg-Eppendorf, Mund-, Kiefer- und Gesichtschirurgie, Hamburg, Deutschland
  • Max Heiland - Universitätsklinikum Hamburg-Eppendorf, Mund-, Kiefer- und Gesichtschirurgie, Hamburg, Deutschland
  • Alexander Gröbe - Universitätsklinikum Hamburg-Eppendorf, Mund-, Kiefer- und Gesichtschirurgie, Hamburg, Deutschland
  • Reinhard Friedrich - Universitätsklinikum Hamburg-Eppendorf, Mund-, Kiefer- und Gesichtschirurgie, Hamburg, Deutschland

Deutsche Gesellschaft für Plastische und Wiederherstellungschirurgie. 52. Jahrestagung der Deutschen Gesellschaft für Plastische und Wiederherstellungschirurgie (DGPW). Leipzig, 10.-11.10.2014. Düsseldorf: German Medical Science GMS Publishing House; 2014. Doc14dgpw21

doi: 10.3205/14dgpw21, urn:nbn:de:0183-14dgpw219

Published: December 12, 2014

© 2014 Wikner et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.en). You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.

Outline

Text

Aim: To discriminate clinically relevant aberrance, accuracy of linear measurements in three-dimensional reconstructed data-sets was investigated.

Methods: Three partly edentulous human skulls were examined. Landmarks were defined prior to acquisition. Two CBCT-Scanners and a Quad-slice CT-Scanner were used. Actual distances were physically measured with a calliper and defined as reference. Subsequently, from digital DICOM data-sets three-dimensional virtual models have been generated using maximum intensity projections (MIP). Linear measurements were performed by semi-automated image analysis. Virtual and analogue linear measurements were compared using repeated measurements in a mixed model (p<or =.05).

Results: No significant difference was found among all digital measurements compared to each other while a significant difference was found in matched-pairs analysis between CBCT and calliper (p=0.032). All digitally acquired data resulted in lower mean values compared to the measurements via calliper. A high interobserver reliability was given in digital measurements (interrater-correlation 0.988 to 0.993).

Conclusion: The reconstructed data-sets led to highly consistent values in linear measurements. Yielding a sub-millimetre precision these modalities are assumed to reflect reality in a clinically irrelevant altered manner. During acquisition and evaluation of data a maximum of precision must be achieved.