1. A computer readable storage medium having stored thereon a computer program comprising instructions, which, when executed by a computer, cause the computer to: acquire a set of image data comprising a plurality of image voxels; isolate a set of pulmonary emboli candidates from the plurality of image voxels; apply a non-linear contrast enhancement to the set of pulmonary emboli candidates; filter the enhanced set of pulmonary emboli candidates; output a final set of pulmonary emboli candidates; and create an image comprising the final set of pulmonary emboli candidates.