Abstract: This paper presents the principle and data processing method for L-band ESR imaging reconstruction. Through outlining the whole system, the function of scanning field and gradient field and their relation with projection data are discussed. The flow diagram of reconstruction data processing emphasizing on convolution difference principle and method is given. The filtered back-projection method applied in our system is also described. Finally, some images reconstructed from ESR sígnals of DPPH and coal are given, and the results of experiments are also analysed and discussed.

Key words: L-band ESR, Image reconstruction, Convolution difference method, filtered back-projection