Please assess the completion status of the following clinical trial:

Trial Title: Evaluation of the Impact of Sleep Apnea on Cerebral Volumetry According to Age

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: COHORT
- Primary Purpose: None
- Time Perspective: PROSPECTIVE
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria for patients:~* 18-55 or more than 70 years old~* SAOS (AHI\>30) never treated before~* consent form signed~Inclusion Criteria for subjects:~* 18-55 or more than 70 years old~* No SAOS (AHI\<10)~* consent form signed~Exclusion Criteria (subjects and patients) :~* Contraindication in the practice of MRI: pacemaker, metallic cardiac valve, intra-ocular metal part~* Contraindication in the injection of Gadolinium (allergy during a previous radiological examination).~* Type 1 or 2 diabetes~* History of cerebrovascular accident, myocardial infarction, congestive heart failure~* Chronic and/or severe renal insufficiency~* Chronic respiratory failure~* Neurological pathology~* Central origin sleep apnea (AHIcentral \> 15)

- Gender: MALE
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: t

Study Arms:
- Eldery SAOS+ (Type: None): Patients with severe obstructive sleep apnea (AHI\>30) 70 years old and more
- Eldery SAOS- (Type: None): People without obstructive sleep apnea (AHI\<10) 70 years old and more
- Adult SAOS+ (Type: None): Patients with severe obstructive sleep apnea (AHI\>30) 18 \< Age \< 55 years old
- Adult SAOS- (Type: None): People without obstructive sleep apnea (AHI\<10) 18 \< Age \< 55 years old

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