osirad - PET Voxels and Radiomics from 'OsiriX' Regions of Interest

Reads regions of interest (ROIs) drawn in the 'OsiriX' medical image viewer and exported as XML files, and recovers the exact voxels of each ROI on the positron emission tomography (PET) series stored as Digital Imaging and Communications in Medicine (DICOM) files. The voxels are found by matching the voxel values stored in the XML file to the standardised uptake values (SUV) computed from the DICOM header. The resulting voxel table (positions in pixels and millimetres, and SUV) can be passed to the 'Python' library 'PyRadiomics' (van Griethuysen et al. (2017) <doi:10.1158/0008-5472.CAN-17-0339>) through 'reticulate' to compute radiomics features.