Figure 2 | Scientific Reports

Figure 2

From: Anisotropic longitudinal water proton relaxation in white matter investigated ex vivo in porcine spinal cord with sample rotation

Figure 2

Apparent spin–lattice relaxation times obtained from monoexponential fitting of IR curves measured with hard-pulse inversion (\(\tau_{p}\) = 40 µs) at 36 °C (a–c) and 22 °C (d–f) as a function of the rotation angle. Results from the two ROIs indicated by blue and red shading in Supplementary Fig. S5 are shown in matching colors. A \(T_{1}\) maximum at rotation angles between 30° and 40° is visible if all inversion times are included in the (monoexponential) fits (a, d), especially for the higher temperature. It gradually disappears if only data with TI > 100 ms (b, e) or TI > 450 ms (c, f) are considered, yielding a trend of decreasing \(T_{1}\) with increasing \(\theta_{{{\text{FB}}}}\). Error bars indicated SDs over the ROIs.

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