1. A method comprising: a) using a processor initializing in parallel operation a level set field within a multi-dimensional dataset comprising a plurality of voxels, the multi-dimensional dataset being indicative of an object; b) using the processor generating in parallel operation an initial set of active voxels in dependence upon the initialized level set field; c) using the processor determining in parallel operation new active voxels; d) using the processor removing in parallel operation duplicate active voxels; e) using the processor compacting in parallel operation the non-duplicate active voxels; f) using the processor repeating c) to e) until a quantitative stopping criterion is met; g) using the processor determining level set segmentation data in dependence upon the level set field, the segmentation data being indicative of a feature of the object; and, h) using the processor providing the level set segmentation data.