jlohmeier/mri-edu

MRI simulator for educational purposes written in MATLAB

MRI simulator of spin dynamcis

MRI simulator for educational purposes written in MATLAB

Run files names mridemo_*.m to visualize different MRI pulse sequences

Figure 1: Illustration of the effect of a 90° pulse that is either on resonance or off resonance. In the on-resonance condition, the magnetic field making up the 90° pulse (shown by a black arrow) rotates with the same frequency as the magnetization. In the off-resonance condition, the magnetization rotates faster than the 90° pulse. This results in a slight tilt of the magnetization, but far from the 90° flip in the on-resonance condition.

The code for this figure can be found here

Illustrations of key principles

• 90° pulse
• Slice selection

Illustrations of basic contrast mechanisms

• Proton density
• T2* weighting
• T2-weighting
• T1-weighting
• Inversion recovery: FLAIR

Illustration of advanced contrast mechanisms

• Diffusion weighted imaging
• Fat and water

Illustration of fast sequences

• T1-weighted spoiled gradient echo
• Turbo spin echo
• Balanced steady-state free precession