What criteria do you use to select elderly patients for focused ultrasound thalamotomy?

Elderly patients are perfectly suitable for MRgFUS treatment and are considered if their tremor is resistant to appropriate medical therapy, including propranolol and/or primidone. It should be equal to or greater than 2 on the FTM scale for tremor, and interfere substantially with daily activities and overall quality of life. They have to be able to lie comfortably on the MRI table for 1-1 1/2 hours but no other major contraindications. We have concerns about the elderly patient who lives alone, and if they already have serious balance issues at baseline, because this can worsen after treatment for many weeks/months, so they need adequate support during the recovery.