A method for processing a plurality of spectral datasets (J1-Jn) intended for being used by a molecular imaging method or a method for recording a plurality of spectral datasets (J1-Jn), each spectral dataset (J1-Jn) being defined by a set of spatial positions (Xi, Yj) each of which is associated with a molecular spectrum with at least two dimensions containing a set of molecular information (S(Xi, Yj)), the method including in particular the following steps: for each dataset (J1-Jn), cutting the molecular spectrum associated with each position (Xi, Yj) into a plurality of spectrum segments (T1-Tm); inserting the segments (T1-Tm) obtained for each position (Xi, Yj) of each dataset (J1-Jn) into a database (BDD); selecting in the database (BDD), following a request relating to molecular information of interest, the one or more segments (T1-Tm) containing the molecular information of interest; and selecting, within each segment (T1-Tm), the molecular information of interest.