SPECT Imaging

https://en.wikipedia.org/wiki/Single-photon_emission_computed_tomography
https://guyaneseonline.wordpress.com/2015/06/25/the-most-important-lesson-from-83000-brain-scans-daniel-amen-ted-video/#comment-122285
http://articles.mercola.com/sites/articles/archive/2012/10/28/psychiatry-needs-spect-imaging.aspx
http://www.mayfieldclinic.com/PE-SPECT.htm
http://www.brainplace.com/
http://www.brain-spect.com/spectimages.html
http://www.mayoclinic.org/tests-procedures/spect-scan/basics/definition/PRC-20020674
http://www.studentdrugtesting.org/15.%20Chapter15.PDF

Controversy
http://www.quackwatch.org/06ResearchProjects/amen.html