Alzheimer disease (SPECT)

Case contributed by Carlos Eduardo Anselmi


Memory deficit.


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%

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.