hummingbird12, Amen's "six kinds of ADHD" approach has been disputed by professionals. But the SPECT scans seem to be the most harmful aspects of his treatment:

http://www.nimh.nih.gov/about/director/index-adhd.shtm

http://www.healthyplace.com/adhd/articles/danger-of-using-spect-scan-to-...  - ADHD portion starts p. 3

http://www.washingtonpost.com/lifestyle/magazine/daniel-amen-is-the-most...

http://www.sciencebasedmedicine.org/index.php/spect-scans-at-the-amen-cl...

Good luck