Whats the technologies used to Diagnostic Neurological pain?

These constant headaches am getting are called false by some of my family members, so i just wanna prove them am actually having these headaches(They’re stubborn as hell and bit dimmed minded) I saw in Grey’s Anatomy that they used some imaging diagnostic tool to determine a guy’s constant headache for 8 years, mine has been for 4 so please i need help to identify my problem.
I did see a neurologist, he gave me meds for the headaches 6 months ago but its still there.

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Product Description
Compatible Models / Replace PN : Dell Latitude 100L D640 D800 D810 D820 D830 e4200 e5400 e6400 e6500 pp15s… More >>

NEW AC Adapter Power Supply Charger+Cord for Dell Latitude 100L D640 D800 D810 D820 D830 e4200 e5400 e6400 e6500 pp15s