Related Radiopaedia articles

• measurements and ratios
  • midbrain to pons area ratio (for PSP)
  • Magnetic Resonance Parkinsonism Index (MRPI) (for PSP)
  • frontal horn width to intercaudate distance ratio (FH/CC) (for Huntington disease)
  • intercaudate distance to inner table width ratio (CC/IT) (for Huntington disease)
• signs
  • hummingbird sign (of PSP)
  • Mickey Mouse sign (of PSP)
  • morning glory sign (of PSP)
  • hot cross bun sign (of MSA-C)
  • hockey stick sign (of Creutzfeldt-Jakob disease)
  • pulvinar sign (of Creutzfeldt-Jakob disease)
• scoring systems
  • Fazekas scale for white matter lesions
  • posterior atrophy score of parietal atrophy (PA/PCA) (Koedam score)
  • medial temporal lobe atrophy score (MTA score)
  • global cortical atrophy scale (GCA scale)