BrainVoyager Support

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Image Resampler

image resampler

Description: The resampler plugin for FMR data can be used to obtain a different resolution of the data (for example for a pixel shift map (*.fmr) that will be used for undistortion of a functional image (*.fmr); the plugin is not suitable for phase data, but resampling a pixel shift map should be fine). It is advised to only use the plugin in situations of necessity (due to interpolation considerations). Interpolation degree used: quadratic.

Installation: Close BrainVoyager. Unzip the files (to *.dylib/*.dll, *.ui and *.js) and place them in the directory `/Documents/BVQXExtensions/Plugins_64/'. Restart BrainVoyager.

Usage: Open the FMR to be resampled. Start the plugin from the BrainVoyager "Plugins" menu. Enter the new image matrix dimensions (the matrix dimensions should all increase or decrease (or keep some dimension(s) the same); for example: from 128 x 128 x 30 to 104 x 104 x 30). Click "Start processing". If successful, the plugin will close the original FMR and open the resampled one. Note: The position and interslice time parameters need to be copied manually from the original FMR, slice gap will be incorporated in slice thickness.

Version: 0.3 for BrainVoyager QX 2.3 on Mac OS 10.6.8 and Windows 64-bit (other operating systems to follow).

image_resample_plugin

Acknowledgements: thanks to Dr. Thevenaz for the interpolation code (P. Thévenaz, T. Blu, M. Unser, "Interpolation Revisited," IEEE Transactions on Medical Imaging, vol. 19, no. 7, pp. 739-758, July 2000).