Table 3.

qMT Parameters Estimates in the Spinal Cord Obtained from the Current Study Using the Optimized Framework and from Previous Studies (Single Values Refer to Whole Cord Instead of WM and GM ROIs)

	BPF (n.u.)		${\mathrm{T}}_2^{\mathrm{F}}$ (ms)		${\mathrm{T}}_2^{\mathrm{B}}$ (µs)		k FB (s−1)
	WM	GM	WM	GM	WM	GM	WM	GM
1.5T
Smith et al. 28	0.12	0.07	NE	NE	9	9	7.84	5.36
3T
Dortch et al. 30	0.18	0.9	24	35.4a	11	Fixed	1.71	1.1
Smith et al. 29	0.16	0.14	29.9	32.6b	10.8	10.8	1.7	1.46
Smith et al. 29	0.16	0.13	NE	NE	NE	NE	NE	NE
Current study	0.11		46.5		11.0		1.95
7T
Dortch et al. 31	0.12	0.11	NE	NE	10	Fixed	2.59	1.85

GM, grey matter; NE, not estimated; WM, white matter.

^aEstimated from constraint ${\mathrm{T}}_2^{\mathrm{F}}$ ${\mathrm{R}}_1^{\mathrm{F}}$ = 0.024, where ${\mathrm{R}}_1^{\mathrm{F}}$ is fixed to 1 s⁻¹ and 0.7 s⁻¹ for WM and GM, respectively (from literature).

^bEstimated from constraint ${\mathrm{T}}_2^{\mathrm{F}}$ ${\mathrm{R}}_1^{\mathrm{F}}$ = 0.0232, where ${\mathrm{R}}_1^{\mathrm{F}}$ is derived from measured ${\mathrm{R}}_1^{\text{obs}}$ equal to 0.806 s⁻¹ and 0.752 s⁻¹ in WM and GM, respectively.