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Educational NMR & MRI

Professional solutions for low-field NMR (Nuclear Magnetic Resonance) applications.

EduVMR : Virtual Educational NMR&MRI System

Virtual MRI Data Acquisition and Image Reconstruction Software (VMRI), is a newly developed NMR teaching software. It can simulate the whole MRI process, including basic imaging sequence, data acquisition, K space filled, and several other major aspects of image reconstruction. When the sequence, the original level and parameters are determined, the sampling process, K-space filled and reconstructed image are acquired.

VMRI minimized the need for hardware to effect NMR experiment effect, overcoming the limitations of high hardware demands, long sampling time in actual tests, and insufficient number of the instrument.

VMRI includes three parts: Theory, Prescan and Imaging. The teaching experiments that are possible include: measuring the Larmor Frequency, hard RF pulse determined, electronic shimming, kinds of weighted image and half Fourier scanning technology etc.

Applications

  1. Virtual achieve sequence selection, parameter adjustment, data acquisition, K space filling, image reconstruction
  2. Virtual Electronic Noise and Inhomogeneity effects on Image
  3. Virtual different MRI technology to sample
  4. Supporting 16 NMR&MRI experimental projects

Advantages

  1. Avoiding long sampling time in actual test
  2. Avoiding high requirement with hardware
  3. Avoiding gradient vortex
  4. Greatly reduce equipment costs while meeting the teaching needs

EDUMR : MRI System for Teaching

EDUMR is a desktop NMR device designed for MRI experimental teaching. Courses to teach NMR principles and experiments through MRI demonstration can be created by including EDUMR in physical corresponding majors (modern physics, applied physics, radio physics, electronic engineering, etc.) or medical corresponding majors (large-scale medical apparatus, medical imaging technology, biomedical engineering, etc.). Extensive experimental courses and majors like NMR engineering related to hardware structure can also be established with through the use of EDUMR.

Basic parameters

  1. Magnet type: permanent magnet
  2. Magnetic field intensity: 0.5±0.08T
  3. Probe coil: Ø15mm
  4. Weight: 138Kg

Applications

NMR analyzing and imaging mechanism

Advanced experiments

  • Basic NMR analyzing and imaging mechanism
  • NMR phenomenon
  • Relaxation and NMR signal
  • Spatial orientation of NMR signal
  • NMR image reconstruction
  • Pulse sequence

  • Simulation of 2D-FFT image rebuilding
  • Image quality evaluation
  • Simulation of 3D-FFT image rebuilding
  • Fluorine content measurement of toothpaste
  • Oil content measurement of sesame

Hardware structure

  • Tuning and matching of RF(radio frequency) coil
  • RF switch and pre-amplifier
  • RF power amplifier and RF waveform modulator circuit
  • Data processing experiment (simulation)
  • Gradient amplifier
  • Structure and control signal of spectrometer system
  • High frequency digit storage oscilloscope test

MRI system

  • Magnet body system
  • RF(radio frequency) system
  • Gradient field system
  • Spectrometer and computer system
  • Magnetic shielding and RF shielding

NMR&MRI Principle experiments

  • Mechanical and electronic shimming 
  • Lamor frequency measurement by hard pulse FID sequence
  • FID sequence signal in rotating coordination system
  • 1D-processing and gain adjustment of FID signal
  • Hard pulse RF measurement with hard pulse echo sequence 
  • Soft pulse RF measurement with soft pulse FID sequence
  • Soft pulse echo sequence
  • T1 relaxation time measurement using inversion restoring method
  • T1 relaxation time measurement using saturation restoring method
  • T2 relaxation time measurement using hard pulse CPMG sequence
  • Chemical shift measurement of alcohol

MRI experiment

  • Spin-echo sequence MRI
  • PD（portion density) /T1/T2 weighted imaging(Spin-echo sequence)
  • ID gradient encoding imaging
  • Inversion restoring sequence MRI
  • 2D gradient echo sequence MRI
  • Effect of parameter setting on image size and shape
  • 3D echo sequence MRI

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