T1 Schuff

Class: NodeT1Schuff

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Calculate a T1 map using two inversion recovery images and a reference spin echo image. Inversion times, and repetition time (TR) are detected from the input images.

The equation for calculating the T1 map is:

\(\displaystyle T_1 = \frac{TI_2-TI_1}{\ln\left(\frac{S_e-(-S_{IR1})}{S_e-S_{IR2}}\right)}\),

where \(TI_2\) and \(TI_1\) are the inversion times for images 1 and 2, \(S_e\), \(S_{IR1}\), \(S_{IR2}\) are the signals for the spin echo image and the inversion recovery images, respectively.

Produces a T1 map [ms] as output.

Inputs

SE

Spin echo image.

Type: Image4DFloat, Required, Single

IR

Inversion recovery images.

Type: Image4DFloat, Required, Multiple

Outputs

T1 Map

Resulting T1 map.

Type: Image4DFloat

References

    1. Jahng, L. Stables, A. Ebel, G. B. Matson, D. J. Meyerhoff, M. W. Weiner, and N. Schuff, “Sensitive and fast T1 mapping based on two inversion recovery images and a reference image,” Med. Phys., vol. 32, no. 6, pp. 1524–1528, May 2005.

Keywords: T1, MRI, parametric, map, Schuff, longitudinal, relaxation