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. Author manuscript; available in PMC: 2015 Apr 1.
Published in final edited form as: Magn Reson Med. 2013 Jun 18;71(4):1603–1612. doi: 10.1002/mrm.24792

Figure 3.

Figure 3

LB-QUESP, EH-QUESP and HW-QUESP analyses of simulated CEST MRI results generated with a 10 second saturation time, 1200 Hz chemical exchange rate, and 10 second T1w relaxation time. A representative a) LB-QUESP, b) EH-QUESP, and c) HW-QUESP fitting of simulated CEST results were used to estimate kex. d) The kex estimated with LB-QUESP at short (*) and long (●) T1w relaxation times accurately estimated slow exchange rates, but failed to accurately estimate fast exchange rates. e) EH-QUESP accurately estimated slow and fast exchange rates, and f) HW-QUESP accurately estimated fast exchange rates, with little dependence on T1w relaxation times.