Re: [vmtk-users] vesselness filtering parameters

[Luca A. <luc...@or...>]

Hello David,

 you can find the source code for the vesselness Slicer plugin here

https://github.com/haehn/VMTKSlicerExtension/blob/master/PythonModules/SlicerVmtkCommonLib/VesselnessFilteringLogic.py

I see that method for generating the steps is kept as the default (for the C++ class), which is "logarithmic", while vmtk default is "equispaced".

Try to specify 
-stepmethod logarithmic

in the vmtk command line and see what happens.

Best,


Luca



On Jul 15, 2013, at 1:53 PM, ddwilde wrote:

> Hi VMTK users,
> 
> I used the VMTK-plugin in Slicer4 to get a frangi vesselness filtered 
> image of an angiografic CT image of a mouse dataset (with good results). 
> However when I try to apply the same filter in VMTK directly (with the 
> same parameters), I get different results. There appears to be a lot 
> more background noise. Is the definition of the parameters different 
> between both methods or am I doing something wrong?
> 
> Thanks,
> David
> 
> Used parameters:
> Slicer: Tube<-> Plates: 0.3 // Blobs <-> Tubes: 500 // Contrast: 150 // 
> minimum Diameter: 1[vx] // maximum Diameter: 5[vx]
> VMTK: alpha: 0.3                //          beta: 500           // 
> gamma: 150  //  sigmamin: 0.05 [mm]      //  sigmamax : 0.25 [mm] // 
> sigmasteps: 5
> VMTKcommand: vmtkimagevesselenhancement  -ifile CT.nii -ofile vessel.nii 
> -method frangi -sigmamin 0.05 -sigmamax 0.25 -sigmasteps 5 -alpha 0.3 
> -beta 500 -gamma 150
> 
> the image resolution is 0.05 mm
> 
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