Acta Neurochirurgica

, Volume 152, Issue 11, pp 1847–1857 | Cite as

Virtual reality presurgical planning for cerebral gliomas adjacent to motor pathways in an integrated 3-D stereoscopic visualization of structural MRI and DTI tractography

Clinical Article

Abstract

Objective

Resection of gliomas invading primary motor cortex and subcortical motor pathway is difficult in both surgical decision-making and functional outcome prediction. In this study, magnetic resonance (MR) diffusion tensor imaging (DTI) data were used to perform tractography to visualize pyramidal tract (PT) along its whole length in a stereoscopic virtual reality (VR) environment. The potential value of its clinical application was evaluated.

Methods

Both three-dimensional (3-D) magnetic resonance imaging (MRI) and DTI datasets were obtained from 45 eligible patients with suspected cerebral gliomas and then transferred to the VR system (Dextroscope; Volume Interactions Pte. Ltd., Singapore). The cortex and tumor were segmented and reconstructed via MRI, respectively, while the tractographic PTs were reconstructed via DTI. All those were presented in a stereoscopic 3-D display synchronously, for the purpose of patient-specific presurgical planning and surgical simulation in each case. The relationship between increasing amplitude of the number of effective fibers of PT (EPT) at affected sides and the patients’ Karnofsky Performance Scale (KPS) at 6 months was addressed out.

Results

In VR presurgical planning for gliomas, surgery was aided by stereoscopic 3-D visualizing the relative position of the PTs and a tumor. There was no significant difference between pre- and postsurgical EPT in this population. A positive relationship was proved between EPT increasing amplitude and 6-month KPS.

Conclusions

3-D stereoscopic visualization of tractography in this VR environment enhances the operators to well understand the anatomic information of intra-axial tumor contours and adjacent PT, results in surgical trajectory optimization initially, and maximal safe tumor resection finally. In accordance to the EPT increasing amplitude, surgeon can predict the long-term motor functional outcome.

Keywords

Diffusion tensor imaging Glioma Outcome Tractography Virtual reality 

Abbreviations

DEC

Directionally encoded color

DTI

Diffusion tensor imaging

EPT

Effective fibers of pyramidal tract

fMRI

Functional magnetic resonance imaging

HGG

High-grade glioma

KPS

Karnofsky Performance Scale

LGG

Low-grade glioma

MRI

Magnetic resonance imaging

PT

Pyramidal tract

ROI

Region of interest

VR

Virtual reality

Notes

Acknowledgments

We sincerely thank Mr. Jian-bing Shi for technical support in the MRI manipulation. This project was sponsored by the Ministry of Health of China (2007–2009) and Shanghai government, P. R. China (NO. 07QA14008).

Statement of authorship

This prospective clinical study was approved by local ethics committee before commencing.

Disclosure

We have no personal financial interest regarding the DTI-based Virtual Reality System described in this paper. None of the authors has received any funding from Dextroscope, Volume Interactions.

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Tian-ming Qiu
    • 1
  • Yi Zhang
    • 1
  • Jin-Song Wu
    • 1
  • Wei-Jun Tang
    • 2
  • Yao Zhao
    • 1
  • Zhi-Guang Pan
    • 1
  • Ying Mao
    • 1
  • Liang-Fu Zhou
    • 1
  1. 1.Shanghai Neurosurgical Center, Department of Neurosurgery, Huashan Hospital, Shanghai Medical SchoolFudan UniversityShanghaiPeople’s Republic of China
  2. 2.Department of Radiology, Huashan Hospital,Shanghai Medical CollegeFudan UniversityShanghaiChina

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