Gradient Echo Contrast

Class: NodeGradientEchoContrast

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This node generates simulated MRI images of gradient-echo type using proton density, T1 and T2* maps and signal equations.

Example Workflows

Proton density map.

Type: Image4DFloat, Required, Single

T1 map in units of seconds.

Type: Image4DFloat, Required, Single

T2* map in units of seconds.

Type: Image4DFloat, Required, Single

The calculated image.

Type: Image4DFloat

Select type of contrast.

For SpoiledGradientEcho the signal is cacluated using:

S = P D \frac{1 - e^{- T R / T_{1}}}{1 - \cos (F A) e^{- T R / T_{1}}} \sin (F A) e^{- T E / T_{2}^{*}}

Values: SpoiledGradientEcho

The repetition time (TR).

The echo time (TR).

Flip angle (FA)

Inversion/saturation time (TI)