Fecha de publicación: -- Fuente: WIPO "tomato" The present disclosure relates to a (computer-implemented) method for determining a lifetime distribution of a multi-exponential recovery process recovering to a steady-state value in a system, the multi-exponential process having a recovery factor quantifying the initial point of the multi-exponential recovery process, the method comprising: providing N discrete data points measured from the system using a sensor; obtaining a set of linear equations representing the multi-exponential recovery process using the N discrete data points; determining the lifetime distribution by solving said set of linear equations, wherein the solution to the set of linear equations comprises said steady-state value; calculating the recovery factor from the determined lifetime distribution.The present disclosure further relates to a data processing device for determining a lifetime distribution of a multi-exponential process using the presently disclosed method.