def METHOD_NAME(spect_name, rad, scatter_flag):
    available_rad = {
        "Tc99m": get_simplified_digitizer_channels_Tc99m,
        "Lu177": get_simplified_digitizer_channels_Lu177,
        "In111": get_simplified_digitizer_channels_In111,
        "I131": get_simplified_digitizer_channels_I131,
    }
    if rad not in available_rad:
        gate.fatal(
            f"Error, the radionuclide {rad} is not known, list of available is: {available_rad}"
        )
    return available_rad[rad](spect_name, scatter_flag)