[Insight-users] Medial curve extraction (itk::MedialCurveImageFilter)

[Pedro Névoa]

Thank you for the answers.

I am using a .vtk image as input to the filter.

2011/5/24 Sergio Vera <sergio.vera at alma3d.com>

> Pedro,
> what image are you passing as input to the filter?
>
> MedialCurveImageFilter requires a distance map in order to work properly.
> Even more, you need to supply a smoothed distance map in. Although not
> explicitly specified in the insight journal article, in the code example you
> can see how it is done. My experience is that unsmoothed distance map does
> not work, and that a gaussian blurred dist map is required.
>
> Hope it helps
>
> On Tue, May 24, 2011 at 12:16 AM, Daniel Blezek <Blezek.Daniel at mayo.edu>wrote:
>
>>  Pedro,
>>
>>   We’ve found the MedialCurve method to be very sensitive, and difficult
>> to use correctly.  In contrast, the BinaryThinningImageFilter3D (also from
>> an Insight Journal article), does a very nice job.
>>
>> -dan
>>
>>
>>
>> On 5/23/11 3:26 PM, "Pedro Névoa" <pedronevoa at gmail.com> wrote:
>>
>> Hello,
>>
>> I'm trying to reduce a femur to a simple line, in order to achieve an
>> image of the femur's medial axis. I tried to use the MedialCurve method to
>> accomplish this but no results were obtained.
>>
>> The pixel type of the input image is signed short. I realize that the
>> input pixel type accepted by Medial Curve is float so I changed the pixel
>> type of my image to float using ImageReadCastWrite but it kept on not giving
>> any results - the algorithm is processed endlessly.
>>
>> Does anyone know what may be the problem?
>>
>> Grateful for your attention,
>>
>>
>> --
>> *Daniel Blezek, PhD
>> *Medical Imaging Informatics Innovation Center
>>
>> P 127 or (77) 8 8886
>> T 507 538 8886
>> E blezek.daniel at mayo.edu
>>
>> Mayo Clinic
>> 200 First St. S.W.
>> Harwick SL-44
>> Rochester, MN 55905
>> mayoclinic.org
>> "It is more complicated than you think." -- RFC 1925
>>
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>
>
> --
> Sergio Vera
>
>  Alma IT Systems
>  C/ Vilana, 4B, 4º 1ª
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>



-- 
Pedro Névoa
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