xgrid3d: A Free Software Tool for Quantitative Image Analysis and Internal Dosimetry

A free software tool xgrid3d has been developed to perform quantitative image analysis and internal dosimetry in the context of preclinical research of radionuclide therapies. However, its use extends to more general three-dimensional image processing, including geometric transformations, image registration and computed tomography reconstruction. A description of the software, its functionality and the structure of its graphical user interface are presented, as well as some applications where it has been used successfully. Being a free software project, it is expected to grow based on user suggestions, requests and contributions. It is available for download in source code form at https://github.com/seirios/xgrid3d under the GNU GPLv3 license.