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. Author manuscript; available in PMC: 2020 May 1.
Published in final edited form as: Magn Reson Med. 2018 Dec 18;81(5):3065–3079. doi: 10.1002/mrm.27632

Figure 4.

Figure 4.

Comparison of direct modeling with Gaussian smoothing (first row) and regularized SPA modeling (second row). (a) Perfusion map without diffusion weighting acquired at PLD=900ms. (b) Perfusion map with b=14 s/mm2 (VENC=7.5cm/s to suppress vascular signal) acquired at PLD = 900 ms. (c) ATT map. (d) Perfusion map without diffusion weighting acquired at PLD = 1800 ms. (e) Perfusion map with b=50 s/mm2 acquired at PLD = 1800ms. (f) kw map. Red arrows indicate the local regions with noise induced spuriously high kw values using direct modeling (first row). kw map from regularized SPA modeling was relatively smooth (second row).