Numerical Fibre Generator (NFG) News

Updated README file in 'Docs'

Tom Close — Fri, 24 Feb 2012 7:09:29 GMT

Updated README file in 'Docs' section of this page to include a description of the correspondence between the generated strand coordinates and the simulated voxel indices (a FAQ).

Version 1.1 released adding new functionality

Tom Close — Wed, 29 Apr 2009 7:48:02 GMT

Version 1.1 has been released adding a new tool to automatically draw ROIs around the endpoints of selected bundles. These ROIs can then be used to seed streamlines tracking algorithms.

Version 1.1 also allows the inclusion of fixed isotropic regions within the phantoms. These regions can then be used to model isotropic tissue such as grey matter and CSF.

NFG manuscript in press (NeuroImage)!!!

Tom Close — Wed, 29 Apr 2009 6:45:05 GMT

A manuscript describing the methods behind the Numerical Fibre Generator has just been accepted for publication in NeuroImage. Its reference is

Close T.G. et al., A software tool to generate simulated white matter structures for the assessment of fibre-tracking algorithms, neuroImage (2009), doi:10.1016/j.neuroimage.2009.03.077

Version 1.0.3 released to fix tensor orientation bug

Tom Close — Fri, 07 Nov 2008 6:50:53 GMT

My Apologies but the previous version 1.0.2 only fixed part of the problem with the calculation of the diffusion tensor used to generate the signal at each 'subvoxel'. Version 1.0.3 has been released to hopefully fix it once and for all :)

Version 1.0.2 released to fix tensor orientation bug

Tom Close — Thu, 06 Nov 2008 3:32:24 GMT

Version 1.0.2 fixes a bug that occurs in the simulation of the DW-MR images for versions <= 1.0.1. The bug causes the orientation of the tensors used to simulate the signal to be slightly elevated towards the z-axis. This effect is most pronounced when the fibre is running parallel to the x-axis.

NB: Updates mailing list available

Tom Close — Thu, 30 Oct 2008 9:09:24 GMT

Please join the 'nfg-updates' mailing list if you wish to be informed of any future updates or bug fixes.

Version 1.0.1 released to fix noise issues

Tom Close — Thu, 30 Oct 2008 5:36:43 GMT

The default noise level added to images in v1.0 is inadvertently much lower than intended. v1.0.1 fixes this and related problems.

README document revised to included 'resample' description

Tom Close — Mon, 27 Oct 2008 11:24:19 GMT

A description of the 'resample' tool has been included in a revised README.txt file.

Numerical Fibre Generator v1.0 released

Tom Close — Thu, 23 Oct 2008 3:17:29 GMT

Version 1.0 of 'Numerical Fibre Generator' has been released, including critical bug fixes from v0.9.5. Additionally, ten 'ready-made' white matter phantoms and their corresponding DW-MR images are now available for download.