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. Author manuscript; available in PMC: 2015 Apr 1.
Published in final edited form as: Neuroimage. 2013 Dec 15;89:92–109. doi: 10.1016/j.neuroimage.2013.12.007

Figure 4.

Figure 4

Simulations of observed longitudinal and transverse rotating frame relaxation rates for the 2SX/FXL model (Eqs. 7–9) during GOIA-W(16,4) pulses of 4 ms duration, 5 kHz bandwidth and 0.382 kHz peak amplitude. For simulations in Fig. 4(A,C) Pb was fixed at 0.15 and δωex was assumed 0.8 ppm at 2.89T (≈ 100 Hz). For simulations in Fig. 4(B,D) τc,b = 2ns and τex = 0.2 ms. In Figs 4(E,F) the isosurfaces and their intersection through the parameter space are shown corresponding to T1ρ = 90ms and T2ρ = 85ms. Because of the 4 dimensional parameter space the isosurfaces are shown when one of the model parameters is fixed to a particular value. In Fig. 4E δωex was assumed 0.8 ppm, and Fig. 4F Pb was assumed 0.15. The correlation time of free water was assumed τc,f ≈ 5 ps. The B0 field was considered 2.89T.