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Erschienen in: European Radiology 1/2013

01.01.2013 | Neuro

Reliability of the corticospinal tract and arcuate fasciculus reconstructed with DTI-based tractography: implications for clinical practice

verfasst von: Gert Kristo, Alexander Leemans, Beatrice de Gelder, Mathijs Raemaekers, Geert-Jan Rutten, Nick Ramsey

Erschienen in: European Radiology | Ausgabe 1/2013

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Abstract

Objectives

To assess the reliability of diffusion tensor imaging (DTI)-based fibre tractography (FT), which is a prerequisite for clinical applications of this technique. Here we assess the test–retest reproducibility of the architectural and microstructural features of two clinically relevant tracts reconstructed with DTI-FT.

Methods

The corticospinal tract (CST), arcuate fasciculus (AF) and its long segment (AFl) were reconstructed in 17 healthy subjects imaged twice using a deterministic approach. Coefficients of variation (CVs) of diffusion-derived tract values were used to assess the microstructural reproducibility. Spatial correlation and fibre overlap were used to assess the architectural reproducibility.

Results

Spatial correlation was 68 % for the CST and AF, and 69 % for the AFl. Overlap was 69 % for the CST, 61 % for the AF, and 59 % for the AFl. This was comparable to 2-mm tract shift variability. CVs of diffusion-derived tract values were at most 3.4 %.

Conclusions

The results showed low architectural and microstructural variability for the reconstruction of the tracts. The architectural reproducibility results encourage the further investigation of the use of DTI-FT for neurosurgical planning. The high microstructural reproducibility results are promising for using DTI-FT in neurology to assess or predict functional recovery.

Key Points

Magnetic resonance diffusion tensor fibre tractography is increasingly used in the neurosciences.
The architectural reproducibility of fibre pathways can be up to 69 %.
However the microstructural variability of fibre pathways is only 3.4 % at most.
The architectural reproducibility results encourage the use of DTI-FT for neurosurgery.
The microstructural reproducibility results support the use of DTI-FT in neurology.
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Metadaten
Titel
Reliability of the corticospinal tract and arcuate fasciculus reconstructed with DTI-based tractography: implications for clinical practice
verfasst von
Gert Kristo
Alexander Leemans
Beatrice de Gelder
Mathijs Raemaekers
Geert-Jan Rutten
Nick Ramsey
Publikationsdatum
01.01.2013
Verlag
Springer-Verlag
Erschienen in
European Radiology / Ausgabe 1/2013
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-012-2589-9

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