TABLE II Current MRI Techniques
Morphological MRI
 Qualitative 2D/3D
  Fast spin-echo (FSE)
  Gradient echo (GRE)
 Quantitative
  Volume
  Thickness
 MR arthrography
Compositional MRI
 Collagen assessment
  T2 mapping
 Proteoglycan assessment
  T1ρ imaging
  Delayed gadolinium enhanced MR imaging of cartilage(dGEMRIC)
  Sodium (Na) MR imaging
  Diffusion-weighted imaging (DWI)
  Newer techniques
   Chemical exchange saturation transfer (CEST)
   Dendrimer-linked nitroxides, liposome-containing compounds