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Evidence-based recommendations for musculoskeletal kinematic 4D-CT studies using wide area-detector scanners: a phantom study with cadaveric correlation

  • Musculoskeletal
  • Published:
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Abstract

Propose

To establish evidence-based recommendations for musculoskeletal kinematic 4D-CT on wide area-detector CT.

Materials and methods

In order to assess factors influencing image quality in kinematic CT studies, a phantom consisting of a polymethylmethacrylate rotating disk with round wells of different sizes was imaged with various acquisition protocols. Cadaveric acquisitions were performed on the ankle joint during motion in two different axes and at different speeds to allow validation of phantom data. Images were acquired with a 320 detector-row CT scanner and were evaluated by two readers.

Results

Motion artefacts were significantly correlated with various parameters (movement axis, distance to centre, rotation speed and volume acquisition speed) (p < 0.0001). The relation between motion artefacts and distance to motion fulcrum was exponential (R2 0.99). Half reconstruction led to a 23 % increase in image noise and a 40 % decrease in motion artefacts. Cadaveric acquisitions confirmed phantom data. Based on these findings, high tube rotation speed and half reconstruction are recommended for kinematic CT. The axis of motion significantly influences image artefacts and should be considered in patient training and evaluation of acquisition protocol suitability.

Conclusion

This study provides evidence-based recommendations for musculoskeletal kinematic 4D-CT.

Key points

• Motion artefacts can hamper the quality and interpretation of dynamic joint studies

• The recommendations presented here help increase image quality

• Patient training and preparation can be improved

• The artefact-free distance concept helps protocol adaptation and comparison

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Acknowledgments

The scientific guarantor of this publication is Professor Blum, Alain. The authors of this manuscript declare relationships with the following companies: Toshiba Medical systems. Two authors involved in this work, (P.A.G.T. and A.B.) participate on a non-remunerated research contract with Toshiba Medical systems for the development and clinical testing of post processing tools for MSK CT. The other authors have no potential conflicts of interest to disclose. The authors state that this work has not received any funding. One of the authors has significant statistical expertise (Hossu G). Institutional Review Board approval was not required because this was a phantom study and the cadaveric acquisitions were performed with completely anonymized cadavers donated to science.

Methodology: prospective, experimental, performed at one institution.

We kindly thank Benoit Corruble and Bruno Puyssegure for their assistance in data acquisition and image post-processing.

Author information

Authors and Affiliations

  1. Service D’imagerie Guilloz, CHRU-Nancy Hôpital Central, Nancy, F-54000, France

    Pedro Augusto Gondim Teixeira, Anne-Sophie Formery & Alain Blum

  2. IADI U947, Université de Lorraine, Nancy, F-54000, France

    Gabriela Hossu

  3. INSERM, CIC-IT 1433, Nancy, F-54000, France

    Gabriela Hossu

  4. IDCmem, 10 passage de liège, 54000, Nancy, France

    Daniel Winninger

  5. Service de radiologie, Hôpital de Mercy, 57085, Metz, France

    Toufik Batch

  6. Medical Imaging Department, Legouest Military Instruction Hospital, 27 Avenue de Plantières, BP 90001, 57077, Metz Cedex 3, France

    Alban Gervaise

Authors
  1. Pedro Augusto Gondim Teixeira
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  2. Anne-Sophie Formery
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  3. Gabriela Hossu
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  4. Daniel Winninger
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  5. Toufik Batch
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  6. Alban Gervaise
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  7. Alain Blum
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Corresponding author

Correspondence to Pedro Augusto Gondim Teixeira.

Electronic supplementary material

Below is the link to the electronic supplementary material.

Supplementary digital content 1

Volume rendered 4D reconstruction showing cadaveric displacement during flexion-extension. (MP4 211 kb)

Supplementary digital content 2

Volume rendered 4D reconstruction showing cadaveric displacement during internal-external rotation. (MP4 140 kb)

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Gondim Teixeira, P.A., Formery, AS., Hossu, G. et al. Evidence-based recommendations for musculoskeletal kinematic 4D-CT studies using wide area-detector scanners: a phantom study with cadaveric correlation. Eur Radiol 27, 437–446 (2017). https://doi.org/10.1007/s00330-016-4362-y

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  • DOI: https://doi.org/10.1007/s00330-016-4362-y

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