Unfortunately, the topic of ADHD and brain imaging has been full of bad research and grifters. At the extreme end, people like Dr. Amen were writing books about how ADHD and neuroimaging were correlated, which turned into attempts to sell SPECT imaging for ADHD purposes through his clinics.
Using brain imaging to push questionable psychiatry premises was very popular for a while, and you need to take a lot of research from that era with a huge grain of salt. Remember that with the right settings, neuroscientists can even produce images showing activity in brain regions of completely dead salmon: https://www.wired.com/2009/09/fmrisalmon/
Using brain imaging to push questionable psychiatry premises was very popular for a while, and you need to take a lot of research from that era with a huge grain of salt. Remember that with the right settings, neuroscientists can even produce images showing activity in brain regions of completely dead salmon: https://www.wired.com/2009/09/fmrisalmon/