The VTC inspector is a tool that gives some information about your VTC. It helps you to inspect your data without the need of going over all the time courses individually. A lot of the VTC inspector functions, like which output you want to generate and what to regard as an outlier, are customizable in a menu for Brainvoyager 2.1 and higher.
The output of the VTC inspector is:
- A Temporal Signal to Noise map: dividing the mean signal intensity in a voxel by the standard deviation of its signal time course.
- A 1+2 time lagged autocorrelation map that can give you an indication of where in the brain a meaningful (i.e. not random noise) signal is measured. This is more of an experimental feature.
- An outlier map with the maximum deviation (in standard deviations) of each time course. By default this map is thresholded between 4 and 8 standard deviations (>4 is considered an outlier, but this is customizable).
- A temporal outlier list written to the log tab (and optional csv file) of how many VTC voxels in a certain volume are outliers and how may of them are considered as spikes (spike definition is customizable). This information could for example be used to create a confound predictor that filters out a certain time point.
Latest Changes
v1.2 (23 november 2011)
- Fixed bug that could cause a crash with very long names.
- Speed improvement in windows using compiler optimizations.
v1.1 (12 august 2011)
- Reduced Memory usage by only taking single time courses for transforming/caluculating instead of the whole 4D data block.
v1.0 (09 July 2010)
- Beta Status removed, official 1.0 release.
- Added the option to process a list of VTC files that is created in the user interface.
- A Mac compilation of the plugin is now available
beta (31 March 2010)
- GUI menu added for Brainvoyager 2.1, latest settings automatically saved.
- Added a windows 64-bit version.
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From left to right the following maps are show: Outliers, 1+2 Lagged AutoCorrelation, TSNR
Remarks
- For the old 1.10.4 you need to activate the maps in the Volume Maps dialog to see it.
Downloads
VTCinspector 1.2 for BVQX 2.1.x and higher (win 32-bit)
VTCinspector 1.2 for BVQX 2.1.x and higher (win 64-bit)
VTCinspector 1.2 for BVQX 2.1.x and higher (Mac OS X) (compiled in Snow Leopard)
VTCinspector 1.0 beta for BVQX 1.10.4 (win 32-bit) (without user interface)
Please write to support AT brainvoyager DOT com in case you find any errors or want to give feedback on the VTC inspector!
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