Validation of diffusion tensor MRI measurements of cardiac microstructure with structure tensor synchrotron radiation imaging

Table 1 Transmural measurements of helix angle (HA) and transverse angle (TA)

ROI	HA (DTI)		HA (STSRI)		TA (DTI)		TA (STSRI)
	Linearity	Range	Linearity	Range	Linearity	Range	Linearity	Range
1	0.934	131.1	0.920	142.8	0.048	−4.6	0.004	−1.4
2	0.994	166.1	0.996	175.6	0.442	21.2	0.549	24.0
3	0.987	137.7	0.986	148.8	0.227	−3.2	0.140	−2.8
4	0.985	93.2	0.979	106.0	0.693	−12.1	0.403	−12.9
5	0.989	110.2	0.993	126.6	0.962	−21.7	0.890	−26.5
6	0.987	131.9	0.987	148.3	0.509	−24.5	0.388	−31.9
7	0.990	128.4	0.986	139.9	0.658	38.2	0.759	15.7
8	0.988	162.8	0.993	180.1	0.400	10.1	0.382	10.9
9	0.980	146.2	0.979	162.1	0.254	−4.6	0.025	−1.8
10	0.985	110.2	0.981	129.0	0.888	−16.8	0.799	−18.7
11	0.991	111.6	0.987	126.8	0.845	−20.2	0.794	−28.9
12	0.992	127.3	0.997	143.1	0.496	−25.6	0.306	−26.4
13	0.994	124.0	0.990	132.6	0.622	7.0	0.004	−1.4
14	0.995	147.9	0.995	156.5	0.016	1.9	0.001	−0.6
15	0.996	125.9	0.997	137.4	0.924	−20.3	0.931	−23.4
16	0.996	139.5	0.992	149.5	0.843	−41.1	0.811	−47.9
17	0.995	131.9	0.993	131.7	0.927	−31.9	0.937	−40.2

The whole LV was segmented based on the 17-segment American Heart Association model. Linearity and range (°) were measured from the LV subepicardium to subendocardium. Means and standard deviations are reported over all voxels in each region

ISSN: 1532-429X