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. Author manuscript; available in PMC: 2014 Oct 1.
Published in final edited form as: Magn Reson Med. 2012 Dec 13;70(4):1070–1081. doi: 10.1002/mrm.24560

Fig. 2.

Fig. 2

MT asymmetry maps calculated by subtracting the MT images of 3.5 ppm from –3.5 ppm. a: At B1 = 0.9 μT. The WM is brighter than the GM. b: At B1 = 2.3 μT. The WM-GM contrast is weaker.