Positronium Lifetime Validation Measurements with PET/CT

Processed data from the publication W. Steinberger et al. EJNMMI Physics 11, 76 (2024) available at https://doi.org/10.1186/s40658-024-00678-4 The evaluated singles data (the .l files) is in binary format. Its made of 64 bit floating point numbers and the data is organized as x,y,z,t. The three coordinates are in mm and the time difference between the prompt and coincidence photon is in ns for each detected three-photon event. It can be read with the following Python function, which returns a large table with four columns. def read_singles_binary(file): a = np.fromfile(file, dtype=np.float64).reshape((-1,4)) a = a[:,[1,2,0,3]] # convert to zyx a[:,0] *= -1 # flip z a[:,1] *= -1 # flip y return a The text files are time difference distributions with two columns: time difference in ns and number of counts.