Hello,

I’m currently using BoneJ plugin to estimate diameter of 3D structure (vessel).

This works perfectly and the result are good approximation of the real size of the object.

But I have a question, how is it possible to have sub-resolution value ?

I design some toy data to understand how the algorithm create those sub-resolution value, but I don’t get it. How a voxel sphere can be under voxel size ?

My image resolution at MRI is 0.4 mm isotropic, but I get value between resolution. For BoneJ, min value is 2*ImageResolution, but I get value between 0.8 and 1.2 mm.

Is it possible to explain me why this happen and is it a numerical problem ? Because I try to compare 2 images. One with small diameter and the other one bigger (dilation of the vessel). And when I do voxel-based comparison, I get sub-resolution delta (change in diameter), which means the method detect change under MRI resolution, can I really see this ?

Alex