I looked into this several months ago after my own SPECT scan. I learned of three ways to address this, all of which are experimental and not guaranteed:

1) HBOT: Safe, very expensive, not very accessible.

2) Low Level Laser Therapy: Safe, affordable, very accessible.

3) Visualization Meditation: Safe, free, very accessible.

Let me know if you would like an elaboration on anything.

Hains