Please assess the completion status of the following clinical trial:

Trial Title: Dexmedetomidine in Children for Magnetic Resonance Imaging (MRI) Sedation

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: OTHER
- Time Perspective: None
- Masking: TRIPLE
- Phase: PHASE4
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* MRI~* ASA I-II~Exclusion Criteria:~* hepatic and renal failure~* difficult airway~* nasal deformity~* anaphylaxis to dexmedetomidine~* neurologic disease~* metabolic disorders~* electrolyte imbalance~* dehydration~* malnutrition

- Gender: ALL
- Minimum Age: 1 Year
- Maximum Age: 10 Years
- Healthy Volunteers: f

Study Arms:
- dexmedetomidine 3mcg/kg (Type: ACTIVE_COMPARATOR): dexmedetomidine 3 mcg/kg intranasal 50 minutes before MRI
- dexmedetomidine 4mcg/kg (Type: ACTIVE_COMPARATOR): dexmedetomidine 4 mcg/kg intranasal 50 minutes before MRI

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