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. Author manuscript; available in PMC: 2015 Nov 7.
Published in final edited form as: J Biomech. 2014 Sep 28;47(14):3475–3481. doi: 10.1016/j.jbiomech.2014.09.010

Table 4.

Normalized root mean square error (NRMSE) of strain measurements obtained in three subjects at different temporal sampling resolutions. Increasing the number of lines acquired per rotation decreases the number of rotations needed to acquire strain data at a single slice. The strain field obtained with the highest temporal sampling resolution (6.1 ms) was used as the “gold standard” for each subject/slice. A spatial resolution of 160 × 24 was used for all acquisitions.

Proposed double trigger approach Standard approach
Δt=12.2 ms
N=12		 Δt=18.4 ms
N=8		 Δt=24.5 ms
N=6		 Δt=12.2 ms
N=22		 maxγmax
Subject 1 Slice 1 0.249 0.141 0.229 1.710 0.053
Subject 1 Slice 2 0.169 0.143 0.173 0.319 0.048
Subject 2 Slice 1 0.116 0.143 0.131 N/A 0.058
Subject 2 Slice 2 0.143 0.165 0.145 N/A 0.045
Subject 3 Slice 1 0.246 0.221 0.439 N/A 0.045
Subject 3 Slice 2 0.234 0.236 0.349 N/A 0.038