| Publikationstyp: | Beitrag in wissenschaftlicher Zeitschrift |
| Art der Begutachtung: | Peer review (Publikation) |
| Titel: | Preliminary experience with visualization of intracortical fibers by focused high-resolution diffusion tensor imaging |
| Autor/-in: | Järmann, Thomas De Zanche, Nicolas Staempfli, P. Pruessmann, K.P. Valavanis, A. Boesiger, P. Kollias, Spyros |
| DOI: | 10.3174/ajnr.A0742 |
| Erschienen in: | American Journal of Neuroradiology |
| Band(Heft): | 29 |
| Heft: | 1 |
| Seite(n): | 146 |
| Seiten bis: | 150 |
| Erscheinungsdatum: | 2008 |
| Verlag / Hrsg. Institution: | American Society of Neuroradiology |
| ISSN: | 0195-6108 1936-959X 1936-959X |
| Sprache: | Englisch |
| Schlagwörter: | Adult; Axons; Brain; Diffusion Magnetic Resonance Imaging; Female; Humans; Image enhancement; Image interpretation, computer-assisted; Imaging, three-dimensional; Male; Nerve fibers; Imaging phantoms; Reproducibility of results; Sensitivity and specificity; Algorithms |
| Fachgebiet (DDC): | 616.8: Neurologie und Krankheiten des Nervensystems |
| Zusammenfassung: | Background and Purpose: The inherent low anisotropy of gray matter and the lack of adequate imaging sensitivity and resolution has, so far, impeded depiction of axonal fibers to their intracortical origin or termination. We tested the hypothesis that an experimental approach with high-resolution diffusion tensor imaging (DTI) provides anisotropic data for fiber tractography with sufficient sensitivity to visualize in vivo the fine distribution of white matter bundles at the intracortical level. Materials and Methods: We conducted phantom measurements of signal-to-noise ratio (SNR) and obtained diffusion tensor maps of the occipital lobe in 6 healthy volunteers using a dedicated miniature phased array detector at 3T. We reconstructed virtual fibers using a standard tracking algorithm. Results: The coil array provided a SNR of 8.0 times higher at the head surface compared with a standard quadrature whole head coil. Diffusion tensor maps could be obtained with an in-plane resolution of 0.58 × 0.58 mm2. The axonal trajectories reconstructed from the diffusion data penetrate into the cortical ribbon perpendicular to the pial surface. This is the expected pattern for the terminations of thalamocortical afferent fibers to the middle layers of the occipital cortex and is consistent with the known microstructural organization of the mammalian cerebral cortex. Conclusion: High-resolution DTI reveals intracortical anisotropy with a distinct parallel geometrical order, perpendicular to the pial surface, consistent with structures that may be identified as the terminal afferents in cortical gray matter. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/5021 |
| Volltext Version: | Publizierte Version |
| Lizenz (gemäss Verlagsvertrag): | Lizenz gemäss Verlagsvertrag |
| Departement: | School of Engineering |
| Enthalten in den Sammlungen: | Publikationen School of Engineering |
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Järmann, T., De Zanche, N., Staempfli, P., Pruessmann, K. P., Valavanis, A., Boesiger, P., & Kollias, S. (2008). Preliminary experience with visualization of intracortical fibers by focused high-resolution diffusion tensor imaging. American Journal of Neuroradiology, 29(1), 146–150. https://doi.org/10.3174/ajnr.A0742
Järmann, T. et al. (2008) ‘Preliminary experience with visualization of intracortical fibers by focused high-resolution diffusion tensor imaging’, American Journal of Neuroradiology, 29(1), pp. 146–150. Available at: https://doi.org/10.3174/ajnr.A0742.
T. Järmann et al., “Preliminary experience with visualization of intracortical fibers by focused high-resolution diffusion tensor imaging,” American Journal of Neuroradiology, vol. 29, no. 1, pp. 146–150, 2008, doi: 10.3174/ajnr.A0742.
JÄRMANN, Thomas, Nicolas DE ZANCHE, P. STAEMPFLI, K.P. PRUESSMANN, A. VALAVANIS, P. BOESIGER und Spyros KOLLIAS, 2008. Preliminary experience with visualization of intracortical fibers by focused high-resolution diffusion tensor imaging. American Journal of Neuroradiology. 2008. Bd. 29, Nr. 1, S. 146–150. DOI 10.3174/ajnr.A0742
Järmann, Thomas, Nicolas De Zanche, P. Staempfli, K.P. Pruessmann, A. Valavanis, P. Boesiger, and Spyros Kollias. 2008. “Preliminary Experience with Visualization of Intracortical Fibers by Focused High-Resolution Diffusion Tensor Imaging.” American Journal of Neuroradiology 29 (1): 146–50. https://doi.org/10.3174/ajnr.A0742.
Järmann, Thomas, et al. “Preliminary Experience with Visualization of Intracortical Fibers by Focused High-Resolution Diffusion Tensor Imaging.” American Journal of Neuroradiology, vol. 29, no. 1, 2008, pp. 146–50, https://doi.org/10.3174/ajnr.A0742.
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