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. Author manuscript; available in PMC: 2008 Jul 7.
Published in final edited form as: Med Phys. 2007 Nov;34(11):4519–4525. doi: 10.1118/1.2795675

FIG. 2.

FIG. 2

Inflow dependency and magnetization transfer (MT) effect in perfusion weighted imaging (PWI) of three pulsed arterial spin labeling methods to evaluate signal fluctuations by varying the periodic saturation pulses at the total postlabeling delay time TI2 of 1600 ms at a 1.5 T MRI. The proposed IDOL method is improved in MT effect and is insensitive signal fluctuations. (a) PWI acquired without periodic saturation; (b) PWI acquired with periodic saturation (TI1=800 ms).