Accurate determinations of the NMR spin-spin relaxation parameters provid ed by multiple echoes imaging experiments (MSME) require first of all phase corrected amplitudes to deal with. The invention relates to a simple and rob ust algorithm for the phase correction procedure, to be applied following FF T reconstruction and prior to any fitting decay method. The algorithm is a p ixel-by-pixel algorithm comprising the steps of determining a linear fit fro m complex amplitude values, defining a rotation angle with respect to the re al axis, optimizing the angle, and applying a rotation to the amplitudes of the considered pixel through all echo images. The algorithm provides phase c orrected amplitudes for real-phased images, allowing correct image algebra a nd measurements for T2 constants from any specific ROI on the image.
METHOD FOR DETERMINING PHASE-CORRECTED AMPLITUDES IN NMR RELAXOMETRIC IMAGING