fanDTasia ToolBox

A library for DW-MRI Processing, DTI & DKI Estimation, Higher-Order Tensor analysis & Visualization.

Description

A Matlab library for Diffusion Weighted MRI (DW-MRI) Processing, Diffusion Tensor (DTI) Estimation, Diffusion Kurtosis (DKI) Estimation, Higher-order Diffusion Tensor Analysis, Tensor ODF estimation, Visualization and more.

• MATLAB release: MATLAB 6.0 (R12)

[Jiachen Zhuo]

Nice tools for higher order tensor estimation and plotting. Very good demo.

[Ben]

Hi Angelos,

Do you have some tools for tensor filed smoothing?

Thanks,
Ben

[Angelos Barmpoutis]

Ben, thanks for your feedback! Do you look for a isotropic or anisotropic tensor field smoothing? In the isotropic case, I have available on-line the Tensor Spline smoothing implmentation (IEEE TMI 2007). It is available through the JAVA version of fanDTasia.

Angelos

[Ben]

Hi Angelos,

In my case, an isotropic one is ok. I'v only found a java applet DEMO on the url below.
http://www.cise.ufl.edu/~abarmpou/lab/fanDTasia/

Does "available" mean I can have a taste only? Or did I miss something? Or could you kindly give me an url about that JAVA version of fanDTasia?

Thanks,
Ben

[Angelos Barmpoutis]

Hi Ben,

  Since Jan 2010 it has full functionalities! So "available" means that you can estimate as many tensor (DTI) fields as you want, as many 4th-order tensor fields you want, save them in your hard disk, perform fiber tracking, compute statistics in complex-structured ROIs and all that using parallel processing in super fast speed compared to the Matlab version! I am telling you, Super super fast speed! Try it!

Angelos

[Ben]

Hi Angelos,

Let me make it more clear. I have a 2nd order tensor field. I wanna to smooth it using, e.g. your (an)isotropic Tensor Spline smoothing. Do you have a downloadable code for that in public domain, whatever Matlab or Java? Or an executable is also ok. I simply want to try it on my problem. Thanks.

Ben

[Angelos Barmpoutis]

Hi Ben,

I am sorry, but the only smoothing implementation I have is Direct estimation of a smooth regularized DTI field from raw DW-MRI data. (Again it is in the java-applet version of fanDTasia). If you already have estimated the DTI data and you don't have the original DWMRI, I don't have a method for post-processing tensor field smoothing. Sorry about that, but most of my research has been focused on direct processing of DW-MRI rather than post-processing.

Angelos

[Ben]

Thanks for your kind explanation.

Ben

[C. Andrés]

Very good and useful toolbox. Thank you.

[Qiang]

Hi Angelos,

Do you have code to do DKI processing.

Thanks

Qiang

[Siddharth Ray]

 

[Nad]

Hi Angelos,

the DKI tool is a very useful tool. I am interested to know if you can provide me with a rician noise filter for 3D DWI MRI data?
Thanks a lot for your answer

[paulo]

Hi Angelos,
how can one estimate a high order tensor from an ODF, instead of a signal?

Thanks,
Paulo

[Angelos Barmpoutis]

Hello Paulo,

Are you asking how one can convert an ODF which is expressed usually in Spherical Harmonic Basis Functions into High-Order Cartesian Tensor Basis ODF, right? In general any spherical function parameterized in SH can be converted to CT parameterization using a linear system that maps uniquely the basis functions of the two parameterization. If the conversion is between equivalent orders of SH and CT basis the linear system is formed in a non-singular square matrix form, which can be easily inverted. I hope that this helps!

Angelos