Spin Echo Contrast
Class: NodeSpinEchoContrast
This node generates simulated MRI images of spin-echo type using proton density, T1 and T2 maps and signal equations.
Inputs
PD
Proton density map.
Type: Image4DFloat, Required, Single
T1
T1 map in units of seconds.
Type: Image4DFloat, Required, Single
T2
T2 map in units of seconds.
Type: Image4DFloat, Required, Single
Outputs
Signal
The calculated image.
Type: Image4DFloat
Settings
Contrast Selection
Select type of contrast.
For SpinEcho the signal is cacluated using:
\[
\begin{equation}
S = PD\cdot(1-2e^{-(TR-TE/2)/T_1}+e^{-TR/T_1})e^{-TE/T_2}
\end{equation}
\]
For InversionRecovery the signal is cacluated using:
\[
\begin{equation}
S = PD\cdot(1-2e^{-TI/T_1}+e^{-TR/T_1})e^{-TE/T_2}
\end{equation}
\]
Values: SpinEcho, InversionRecovery
Repetition time [ms] Number
The repetition time (TR).
Echo time [ms] Number
The repetition time (TE).
Inversion time [ms] Number
The repetition time (TI).
See also
Brainweb MR BETA, Gradient-echo contrast BETA
Keywords: MRI, Spin-echo, Inversion recovery
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