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. Author manuscript; available in PMC: 2017 Jul 1.
Published in final edited form as: Magn Reson Med. 2015 Jul 29;76(1):197–205. doi: 10.1002/mrm.25858

Figure 4.

Figure 4

Comparison of self gating (SG) methods using averaged cardiac motion estimates from all coils and cardiac motion estimate by coil clustering of a 4-year-old subject. Both the recorded ECG trigger points and the self-gated trigger points using a template matching algorithm are shown. In the S/I and A/P directions, the self-gating method using an averaged motion estimate from all coils failed to provide accurate cardiac trigger points. However, coil clustering provided robust self-gated triggered points in all three directions. Note that mean trigger delay (MTD) varied at different directions. The temporal variability (TV) with coil clustering was 13.8 ms, 11.7 ms, and 12.2 ms, for the S/I, R/L and A/P directions respectively.