Method for eliminating aliasing artifacts, in a magnetic resonance image, said method comprising the steps of:
- obtaining a first starting image (100a) acquired by a determined acquisition sequence and using a phase encoding for columns, said first starting image (100a) being organized according to a matrix structure (m·n) comprising a plurality of portions (101a) arranged according to m rows and n columns, each portion of said plurality being associated to un respective numerical value corresponding to the light intensity of said portion;
- obtaining a second starting image (100b) obtained through said determined acquisition sequence used for obtaining said first starting image (100a), but using a phase encoding for rows, said second starting image (100b) being organized according to a matrix structure (m·n) comprising a plurality of portions (101b) arranged according to m rows and n columns, each portion of said plurality being associated to un respective numerical value corresponding to the light intensity of said portion;
- said method being characterised in that it, furthermore, provides the steps of:
- comparing said numerical values of each portion (101a) of said first starting image (100a) with a homologous portion (101*b) of said second starting image (100b), i.e. which occupies the same position in the respective matrix structure (m·n);
- construction of a new matrix structure (100c) also this comprising a plurality of portions (101c) arranged according to m rows and n columns, said construction step comprising the steps of:
- computing the difference of the numerical values of each couple of homologous portions (101*a,101*b) of said first and of said second starting image (100a,100b);
- associating to a portion (101*c) of said new matrix structure (101c) homologous to said portions (101*a,101*b) of said first and of said second starting image (100a,100b), the numerical value of the homologous portion (101*a) of the first starting image (100a), or of an average value of the numerical values of said homologous portions (101*a,101*b), if said difference is less than a predetermined threshold value (ΔI), or, alternately, associating to said portion (101*c) the smaller numerical value between the numerical values of said first and of said second homologous portion (101*a,101*b), if said difference is greater than said predetermined threshold value (ΔI),
- iterating the above steps for each couple of homologous portions (101*a,101*b) of said first and of said second starting image (100a,100b) in such a way to obtain a new matrix structure (100c) corresponding to an improved magnetic resonance image;
- and in that before said comparison step a translation step is provided for translating at least one between said first and said second starting image (100a,100b) with respect to a respective reference system, in such a way to minimize the differences among the numerical values of the homologous portions of said first and of said second starting image owing to the fact that said first and said second starting images are obtained with a different phase encoding.