Please assess the completion status of the following clinical trial:

Trial Title: Cerebral Metabolic Changes Associated With Thalamic Stimulation

Study Design Characteristics:
- Allocation: None
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: PHASE3
- Number of Arms: 1.0

Eligibility Criteria:
Inclusion Criteria:~* 18-85 years old~* currently have DBS implanted for medically refractory epilepsy~* Women of childbearing age will be required to use established contraceptive methods while enrolled in the study.~Exclusion Criteria:~Patients who:~* are \< 18 years of age or \> 85 years of age~* are medically unstable~* are women who are potentially pregnant, pregnant or nursing~* have had PET imaging within 1 year.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 85 Years
- Healthy Volunteers: f

Study Arms:
- Study Group (Type: EXPERIMENTAL): In our study, patients will be scanned with their DBS electrodes turned on and off.~Participation involves undergoing 2 separate PET scans on 2 separate days. The MRI and neuropsychological tests will either be performed on the same day as one of the PET scans or on a separate day.~Procedures performed in this study are not part of the standard management of epilepsy.

Based on this trial design, predict the completion outcome and termination type (if applicable).