A DTI MRI will not show specific damage. It will just show areas where fluid flow is abnormal. They have little value for treatment. They can differentiate some kinds of injuries in some cases. They are more focused on confirming that the brain is not functioning correctly, information often needed in a personal injury law suit.

Neurologists request them but it helps if the neurologist has experience with understanding the results.

DTI is a special form of DWI.

You could call an MRI clinic and ask if they have any neuro's who request and have expertise with DTI MRI's. A neuro radiologist may be good at pointing you to the proper neurologist.

If you current symptoms are mild and not a health risk, you may have a hard time getting someone to justify the need for one.