Spatial encoding in Nuclear Magnetic Resonance

Principle

It should be demonstrated how spatial encoding does work in the MR technology. Experiments are executed with a MRT training device giving the opportunity ton investigate some small probes in the sample chamber. Device control is done with the provided software. Investigations comprise the generation of a 1D spatial encoding procedure via an additional magnetic field gradient in the driection of encoding and the visualizations of spatiotemporal T1- and T2-profiles. T1 and T2 are specific to the particular sample material and thus give important evidence for the composition of the subject of investigation. 

Benefits

• Complete, easy to install and affordable MRT education system
• One system to cover all aspects from NMR basics to sophisticated 2D and 3D imaging sequences
• Detailed experiment guides included with the system
• Learning results guaranteed thanks to easy to manage course steps
• Can be set up at any location in the student lab

Tasks

1. 1D spatial encoding via a magnetic field gradient (frequency coding).
2. Visualization of spatiotemporal T1-profiles in spatial encoding direction.
3. Visualization of spatiotemporal T2-profiles in spatial encoding direction.

Learning objectives

• Nuclear spins
• Precession of nuclear spins
• Resonance condition, MR frequency
• MR flip angle
• FID signal (Free Induction Decay)
• Magnetic gradient fields
• Spatial encoding (frequency coding)
• Fast-Fourier-Transformation (FFT)
• T1/T2 relaxation times 
• Spin-lattice relaxation
• Spin-spin relaxation
• Dephasing