Oliver Schmitt

Prof. Oliver Schmitt

orcid

Research Focus & Metrics

Academic Career Length

32Years (1995-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 January 2011 in Neuroscience Letters
Verified
Journal Article
Closed access
CLChristian Lange
Christian Lange
EMEilhard Mix
Eilhard Mix
JFJana Frahm
Jana Frahm
ÄGÄnne Glass
Änne Glass
JMJana Müller
Jana Müller
ARArndt Rolfs
Arndt Rolfs

21 September 2011 in Brain Structure and Function
Verified
Journal Article
Closed access
PDF file
OSOliver Schmitt
Oliver Schmitt
KUKamen G. Usunoff
Kamen G. Usunoff
NLNikolai E. Lazarov
Nikolai E. Lazarov
DIDimitar E. Itzev
Dimitar E. Itzev
PEPeter Eipert
Peter Eipert
AWAndreas Wree
Andreas Wree

20 February 2018 in Brain Structure and Function
Verified
Journal Article
Open access
PDF file
MSMichel R. T. Sinke
Michel R. T. Sinke
WOWillem M. Otte
Willem M. Otte
DCDaan Christiaens
Daan Christiaens
OSOliver Schmitt
Oliver Schmitt
ALAlexander Leemans
Alexander Leemans
RDRick M. Dijkhuizen
Rick M. Dijkhuizen
Diffusion MRI (dMRI)-based tractography offers unique abilities to map whole-brain structural connections in human and animal brains. However, dMRI-based tractography indirectly measures white matter tracts, with suboptimal accuracy and reliability. Recently, sophisticated methods including constrained spherical deconvolution (CSD) and global tractography have been developed to improve tract reconstructions through modeling of more complex fiber orientations. Our study aimed to determine the accuracy of connectome reconstruction for three dMRI-based tractography approaches: diffusion tensor (DT)-based, CSD-based and global tractography. Therefore, we validated whole brain structural connectome reconstructions based on ten ultrahigh-resolution dMRI rat brain scans and 106 cortical regions, from which varying tractography parameters were compared against standardized neuronal tracer data. All tested tractography methods generated considerable numbers of false positive and false negative connections. There was a parameter range trade-off between sensitivity: 0.06–0.63 interhemispherically and 0.22–0.86 intrahemispherically; and specificity: 0.99–0.60 interhemispherically and 0.99–0.23 intrahemispherically. Furthermore, performance of all tractography methods decreased with increasing spatial distance between connected regions. Similar patterns and trade-offs were found, when we applied spherical deconvolution informed filtering of tractograms, streamline thresholding and group-based average network thresholding. Despite the potential of CSD-based and global tractography to handle complex fiber orientations at voxel level, reconstruction accuracy, especially for long-distance connections, remains a challenge. Hence, connectome reconstruction benefits from varying parameter settings and combination of tractography methods to account for anatomical variation of neuronal pathways.

18 September 2006 in International Journal of Computer Vision
Verified
Journal Article
Closed access
PDF file
OSOliver Schmitt
Oliver Schmitt
JMJan Modersitzki
Jan Modersitzki
SHStefan Heldmann
Stefan Heldmann
SWStefan Wirtz
Stefan Wirtz
BFBernd Fischer
Bernd Fischer

15 February 2012 in Neuroinformatics
Verified
Journal Article
Closed access
PDF file
OSOliver Schmitt
Oliver Schmitt
PEPeter Eipert
Peter Eipert

29 November 2014 in Brain Structure and Function
Verified
Journal Article
Closed access
PDF file
OSOliver Schmitt
Oliver Schmitt
PEPeter Eipert
Peter Eipert
RKRichard Kettlitz
Richard Kettlitz
FLFelix Leßmann
Felix Leßmann
AWAndreas Wree
Andreas Wree