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Postprocessing

NM Narine Mesropyan
PM Petra Mürtz
AS Alois M. Sprinkart
WB Wolfgang Block
JL Julian A. Luetkens
UA Ulrike Attenberger
CP Claus C. Pieper
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As described previously21,23, two different approximations of D and f were calculated from signal intensities S(b) and S(0) of the acquired b-values, one from b0 = 0, b1 = 50, b3 = 800 and one from b0 = 0, b2 = 250, b3 = 800 s/mm2:

From the four b-values, D* was approximated by using D2′ and f2′ and the reading for b1:

D*′ cannot be determined for all voxels, because some voxels are not affected by perfusion. Voxels with not defined values were excluded from ROI analysis.

Moreover, the conventional ADC was calculated:

Parameter maps and ROI analyses were calculated offline using custom written software in MATLAB (MathWorks, Natick, MA).

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