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MRI-based 3D pelvic autonomous innervation: a first step towards image-guided pelvic surgery

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Abstract

Objective

To analyse pelvic autonomous innervation with magnetic resonance imaging (MRI) in comparison with anatomical macroscopic dissection on cadavers.

Material and methods

Pelvic MRI was performed in eight adult human cadavers (five men and three women) using a total of four sequences each: T1, T1 fat saturation, T2, diffusion weighed. Images were analysed with segmentation software in order to extract nervous tissue. Key height points of the pelvis autonomous innervation were located in every specimen. Standardised pelvis dissections were then performed. Distances between the same key points and the three anatomical references forming a coordinate system were measured on MRIs and dissections. Concordance (Lin’s concordance correlation coefficient) between MRI and dissection was calculated.

Results

MRI acquisition allowed an adequate visualization of the autonomous innervation. Comparison between 3D MRI images and dissection showed concordant pictures. The statistical analysis showed a mean difference of less than 1 cm between MRI and dissection measures and a correct concordance correlation coefficient on at least two coordinates for each point.

Conclusion

Our acquisition and post-processing method demonstrated that MRI is suitable for detection of autonomous pelvic innervations and can offer a preoperative nerve cartography.

Key Points

• Nerve preservation is a hot topic in pelvic surgery

• High resolution MRI can show distal peripheral nerves

• Anatomo-radiological comparison shows good correlation between MRI and dissection

• 3D reconstructions of pelvic innervation were obtained with an original method

• This is a first step towards image-guided pelvic surgery

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Acknowledgements

The scientific guarantor of this publication is Prof. Jean Paul Beregi (Radiology Department, CHU de Nîmes, University Montpellier 1, Nimes, France). The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article. The authors state that this work has not received any funding. M Demattei (Statistics Department CHU Nîmes) kindly provided statistical advice for this manuscript. Institutional review board approval was not required because this is an experimental study on cadavers. Methodology: experimental, performed at one institution.

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Authors and Affiliations

  1. Laboratory of Experimental Anatomy Faculty of Medicine Montpellier-Nîmes, University Montpellier I, 30 rue Lunaret, 34090, Montpellier, France

    M. M. Bertrand, R. Mazars & M. Prudhomme

  2. Radiology Department, Nîmes University Hospital, University Montpellier 1, Nimes, France

    F. Macri & J. P. Beregi

  3. Urology-Andrology Department, Nîmes University Hospital, University Montpellier 1, Nimes, France

    S. Droupy

  4. Digestive Surgery Department, Nîmes University Hospital, University Montpellier 1, Nimes, France

    R. Mazars & M. Prudhomme

Authors
  1. M. M. Bertrand
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  2. F. Macri
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  3. R. Mazars
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  4. S. Droupy
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  5. J. P. Beregi
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  6. M. Prudhomme
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Correspondence to M. M. Bertrand.

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Bertrand, M.M., Macri, F., Mazars, R. et al. MRI-based 3D pelvic autonomous innervation: a first step towards image-guided pelvic surgery. Eur Radiol 24, 1989–1997 (2014). https://doi.org/10.1007/s00330-014-3211-0

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  • DOI: https://doi.org/10.1007/s00330-014-3211-0

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