Method for the analysis of data provided by Magnetic Resonance Imaging with dynamic administration of a contrast medium, called DCE-MRI, in patients suffering from locally advanced rectal cancer, after neoadjuvant radio-chemotherapy treatment, comprising the phases of: - making available pre-treatment digital images obtained by means of said DCE-MRI performed on the patient before he/she undergoes radio-chemotherapy treatment, wherein are identified one or more regions of pre-treatment interest, which identify the outlines of the tumour; - making available post-treatment digital images obtained by means of said DCE-MRI performed on the patient after he/she has undergone radio-chemotherapy treatment, wherein are identified one or more regions of post-treatment interest, which identify the outlines of the residual tumour; - splitting said regions of pre- and post-treatment interest into a plurality of portions; - calculating a first time-intensity curve for each of said portions of the regions of pre-treatment interest and a second time-intensity curve for each of said portions of the regions of post-treatment interest, where the intensity is the level of intensity of the colour of each of said identified portions the colour being correlated to the absorption of the contrast medium; - calculating the maximum signal difference and the gradient of the wash-out section for each of said first and said second curves so calculated; - calculating the median value of the maximum signal difference and of the gradient of the wash-out section calculated for said first and for said second curves; - calculating the percentage variation between the median values of the maximum signal difference and of the gradient of the wash-out section calculated for said first curves and the median values of the maximum signal difference and of the gradient of the wash-out section calculated for said second curves; - linearly combining said percentage variation of the maximum signal difference and said percentage variation of the gradient of the wash-out section, to define a relative linear classification index. - making available pre-treatment digital images obtained by means of said DCE-MRI performed on the patient before he/she undergoes radio-chemotherapy treatment, wherein are identified one or more regions of pre-treatment interest, which identify the outlines of the tumour; - making available post-treatment digital images obtained by means of said DCE-MRI performed on the patient after he/she has undergone radio-chemotherapy treatment, wherein are identified one or more regions of post-treatment interest, which identify the outlines of the residual tumour; - splitting said regions of pre- and post-treatment interest into a plurality of portions; - calculating a first time-intensity curve for each of said portions of the regions of pre-treatment interest and a second time-intensity curve for each of said portions of the regions of post-treatment interest, where the intensity is the level of intensity of the colour of each of said identified portions the colour being correlated to the absorption of the contrast medium; - calculating the maximum signal difference and the gradient of the wash-out section for each of said first and said second curves so calculated; - calculating the median value of the maximum signal difference and of the gradient of the wash-out section calculated for said first and for said second curves; - calculating the percentage variation between the median values of the maximum signal difference and of the gradient of the wash-out section calculated for said first curves and the median values of the maximum signal difference and of the gradient of the wash-out section calculated for said second curves; - linearly combining said percentage variation of the maximum signal difference and said percentage variation of the gradient of the wash-out section, to define a relative linear classification index.