Alzheimer disease (SPECT)

Case contributed by Carlos Eduardo Anselmi

Presentation

Memory deficit.

SPECT - 99MTC-ECD

Nuclear medicine

Brain perfusion with 99mTc-ECD shows bilateral temporoparietal hypoperfusion. 

Case Discussion

Different perfusion patterns have the following probabilities of Alzheimer disease:

  • normal: 19%
  • bilateral temporoparietal hypoperfusion: 82%
  • bilateral temporoparietal hypoperfusion and other defects: 77%
  • unilateral temporoparietal hypoperfusion: 57%
  • frontal hypoperfusion: 43%
  • other large defects: 18%
  • multiple small defects: 0%

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