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Table 4 Summary statistics of voxel-wise comparison of ST/DTI sheetlet normal to FI

From: Comparison of diffusion tensor imaging by cardiovascular magnetic resonance and gadolinium enhanced 3D image intensity approaches to investigation of structural anisotropy in explanted rat hearts

# a STW/DTW CMR n-dir b-value (s/mm 2 ) |[v 3 ST or e 3 DTI ]n FI | median ± I.Q.R. (°)
LATERAL ROI
First ST and DTI parameter sets
8 3/3 T1W NA NA 8.7 ± 7.8
1 NA DTI 6 1000 22.5 ± 13.8
Second ST and DTI parameter sets
8 5/5 T1W NA NA 9.1 ± 7.4
2 NA DTI 12 1000 24.1 ± 11.9
SEPTAL ROI
First ST and DTI parameter sets
8 3/3 T1W NA NA 7.4 ± 8.7
1 NA DTI 6 1000 54.4 ± 47.3
Second ST and DTI parameter sets
8 5/5 T1W NA NA 8.5 ± 9.7
2 NA DTI 12 1000 60.5 ± 53.4
  1. These statistics relate to the histograms in Figure 7 of the voxel-wise comparison of ST and DTI determined sheetlet putative normal orientations to the FI normal for the lateral ROI (left) and for the septal ROI (right). ; a – scan # as defined in Table 1; NA: Not Applicable; FLASH: fast low angle shot; ST: structure tensor of FLASH data; DTI: diffusion tensor magnetic resonance imaging; T1W is T1-weighted FLASH; n-dir: number of diffusion directions; ROI: region(s) of interest. FI: FLASH isosurface data; DTW: derivative template width STW: smoothing template width. The symbols for vectors and derived angles are defined in Table 2.