Use an edge preserving filter for 3 dimensional PET volume?

Hi all,

I would like to apply an edge preserving filter for 3 dimensional PET images.

I found a nice solution with median filter (medfilt3).

1) My first thought was to use imgaussfilt3 but the results are not appropriate. (see figure imgaussianfilt3) The image is too blurred and the edges are not well conserved.

% PETblurred = imgaussfilt3(PETvolume, 6.0);

2) The median filter gives sharper edges in the image. (see figure medfilt3)

% PETblurred = medfilt3(PETvolume,[11 11 11]);

For my project I need 1 or 2 more filters which blur my PET volume but retain the edges sharp.

Can someone tell me another solution.

Thanks.

Regards,

kh