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+# About the phantom slice
+
+The file `phantom_slice.mat` is generated from the file `phantom_atlas_density_cls.mat` of
+
+* Belzunce, M. A. (2018). High-Resolution Heterogeneous Digital PET [18F]FDG Brain Phantom based on the BigBrain Atlas (1.0) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.1190598
+
+The following Matlab code does the extraction:
+
+```matlab
+load('phantom_atlas_density_cls.mat')
+fdgPhantom = phantom_atlas_density_cls.phantom;
+slice = 280;
+data = fdgPhantom(:,:,slice);
+imwrite(data, 'phantom_slice.png');
+save 'phantom_slice.mat' data;
+```