Method for calibration of the diffusion imaging sequences in the dMRI-type experiment carried out on the MR tomograph

摘要

a calibration sequence imaging diffusion experiment carried out in type dmri ct mr, in which experiment is calculated diffusion coefficients and / or tensora diffusion on the basis of the spatial distribution of the matrix b obtained as a result of the calibration.during calibration is performed the following steps: in the field of rf coils in the test area shall be anizotropowy phantom ct scan mr: diffusion, which has a diffusion limitation in at least one direction along the axis of the main axis associated with the phantom. with known values tensora diffusion.who is anizotropowy diffusion phantom placed successively in three different positions in each orthogonal and, moreover, at the site of the phantom anizotropowego known decomposition tensora diffusion placed phantom izotropowy known diffusion coefficient.for each position the phantom and phantom position anizotropowego for izotropowego performs measurements of nmr signal, identifying them subsequently value matrix b determine the matrix b is carried out for each woksela fixed specific volume at the same time, wewnu0105t concluded the phantom anizotropowego and izotropowego.the spatial distribution of the matrix b is given as a calibration sequence type dmri for the ct scan.