This is very relevant for image reconstruction for medical imaging systems. When determining how much a beam of radiation is attenuated through an image, it rea

This is very relevant for image reconstruction for medical imaging systems. When determining how much a beam of radiation is attenuated through an image, it really matters what the representation you use when translating a 2D matrix of values of material parameters, to an image representation. Are they boxes, trapezoids (bilinear interpolation), 2D gaussians, spheres? Each technique has some drawbacks, but for getting down to millimeter precision in scans it matters.