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. Author manuscript; available in PMC: 2011 Apr 3.
Published in final edited form as: Magn Reson Med. 2008 Nov;60(5):1122–1134. doi: 10.1002/mrm.21737

Figure 10.

Figure 10

Simulations to study the fat-fraction measurement using the 3-pt self-calibrated MP-IDEAL. Simulated 3-pt source signals are produced with an assumed 6-frequency fat spectrum. The 3-pt spectrum self-calibration algorithm described is performed using the field map from conventional 3-pt IDEAL and a 3-frequency fat spectrum model. The conventional IDEAL and MP-IDEAL reconstructions are performed and the fat-fraction measurements are obtained. This process is repeated with increasing fat fraction and different echo times. The true fieldmap value of 50Hz was used. While conventional IDEAL results in biased fat-fraction measurements (dashed line), MP-IDEAL (solid line) leads to substantially improved agreement with the true fat-fraction (dotted line).