Introduction to MR Physics Part 2b

Part 2b of a six part series covering the fundamentals of magnetic resonance imaging physics. In this section, Dr. Stafford introduces concepts of relaxation and image contrast. Click here to view Part 2a or Part 1a.


Terms covered in Part 2:


  • Image voxel
  • Nutation
  • Thermodynamic equilibrium magnetization
  • Proton density
  • Dephasing/Regrowth/Recovery/Decay/Relaxation
  • Bloch equation
  • T2 relaxation curve/ transverse dephasing curve
  • T1 vs T2
  • MR signal
  • Echo (TE)
  • Repetition Time (TR)
  • Inversion Recovery Imaging (IR)
  • Inversion time
  • Proton-weighted images