Can a Brain Scan Diagnose ADHD? Where the Science Actually Stands

Months after your diagnosis, you still catch yourself wondering if you talked your way into it. So you go looking for proof — a scan, a blood test, a picture of your brain with the problem circled in red. Here's where the science on brain scans for ADHD actually stands, why no scan can give you that picture yet, and what helps when you can't stop doubting yourself.