Preoperative and intraoperative diffusion tensor imaging-based fiber tracking in glioma surgery. Export

@article{citeulike:1241892, abstract = {OBJECTIVE: To investigate the intraoperative displacement of major white matter tracts during glioma resection by comparing preoperative and intraoperative diffusion tensor imaging-based fiber tracking. METHODS: In 37 patients undergoing glioma surgery, preoperative and intraoperative diffusion tensor imaging was performed with a 1.5-T magnetic resonance scanner applying an echo-planar imaging sequence with six diffusion directions. For three-dimensional tractography, we implemented a knowledge-based multiple-region-of-interest approach applying user-defined seed regions in the color-coded maps of fractional anisotropy. Tracking was initiated in both the retrograde and orthograde directions according to the direction of the principal eigenvector in each voxel of the region of interest. The tractography results were also assigned color, applying the convention used in color-coded fractional anisotropy maps. RESULTS: Preoperative and intraoperative fiber tracking was technically feasible in all patients. Fiber tract visualization gave a quick and intuitive overview of the displaced course of white matter tracts in three-dimensional space. Comparison of preoperative and intraoperative tractography depicted a marked shifting of major white matter tracts during glioma removal. Maximum white matter tract shifting ranged from -8 to +15 mm (+2.7 +/- 6.0 mm; mean +/- standard deviation); in 29.7\%, an inward and in 62.2\%, an outward shifting was detected. CONCLUSION: Comparing preoperative and intraoperative fiber tracking visualizes a marked shifting and deformation of major white matter tracts because of tumor removal. This shifting emphasizes the need for an intraoperative update of navigation systems during resection of deep-seated tumor portions near eloquent brain areas. Fiber tracking is a method not only for preoperative neurosurgical visualization but also for further intraoperative planning.}, address = {Department of Neurosurgery, University Erlangen-N\"{u}rnberg, Erlangen, Germany. nimsky@nch.imed.uni-erlangen.de}, author = {Nimsky, C. and Ganslandt, O. and Hastreiter, P. and Wang, R. and Benner, T. and Sorensen, A. G. and Fahlbusch, R.}, citeulike-article-id = {1241892}, citeulike-linkout-0 = {http://view.ncbi.nlm.nih.gov/pubmed/15617595}, citeulike-linkout-1 = {http://www.hubmed.org/display.cgi?uids=15617595}, issn = {1524-4040}, journal = {Neurosurgery}, keywords = {dti, intraoperative}, number = {1}, posted-at = {2007-04-21 19:00:25}, priority = {1}, title = {Preoperative and intraoperative diffusion tensor imaging-based fiber tracking in glioma surgery.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/15617595}, volume = {56}, year = {2005} }

TY - JOUR ID - citeulike:1241892 L3 - citeulike-article-id:1241892 N2 - OBJECTIVE: To investigate the intraoperative displacement of major white matter tracts during glioma resection by comparing preoperative and intraoperative diffusion tensor imaging-based fiber tracking. METHODS: In 37 patients undergoing glioma surgery, preoperative and intraoperative diffusion tensor imaging was performed with a 1.5-T magnetic resonance scanner applying an echo-planar imaging sequence with six diffusion directions. For three-dimensional tractography, we implemented a knowledge-based multiple-region-of-interest approach applying user-defined seed regions in the color-coded maps of fractional anisotropy. Tracking was initiated in both the retrograde and orthograde directions according to the direction of the principal eigenvector in each voxel of the region of interest. The tractography results were also assigned color, applying the convention used in color-coded fractional anisotropy maps. RESULTS: Preoperative and intraoperative fiber tracking was technically feasible in all patients. Fiber tract visualization gave a quick and intuitive overview of the displaced course of white matter tracts in three-dimensional space. Comparison of preoperative and intraoperative tractography depicted a marked shifting of major white matter tracts during glioma removal. Maximum white matter tract shifting ranged from -8 to +15 mm (+2.7 +/- 6.0 mm; mean +/- standard deviation); in 29.7%, an inward and in 62.2%, an outward shifting was detected. CONCLUSION: Comparing preoperative and intraoperative fiber tracking visualizes a marked shifting and deformation of major white matter tracts because of tumor removal. This shifting emphasizes the need for an intraoperative update of navigation systems during resection of deep-seated tumor portions near eloquent brain areas. Fiber tracking is a method not only for preoperative neurosurgical visualization but also for further intraoperative planning. IS - 1 JF - Neurosurgery SN - 1524-4040 AD - Department of Neurosurgery, University Erlangen-Nürnberg, Erlangen, Germany. nimsky@nch.imed.uni-erlangen.de TI - Preoperative and intraoperative diffusion tensor imaging-based fiber tracking in glioma surgery. VL - 56 KW - dti KW - intraoperative AU - Nimsky, C AU - Ganslandt, O AU - Hastreiter, P AU - Wang, R AU - Benner, T AU - Sorensen, AG AU - Fahlbusch, R PY - 2005/// UR - http://view.ncbi.nlm.nih.gov/pubmed/15617595 ER -