Please assess the completion status of the following clinical trial:

Trial Title: A Prospective, Cohort Study of Hyperpolarized 3He MRI in Chronic Obstructive Pulmonary Disease

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

Eligibility Criteria:
Inclusion Criteria:~* Written informed consent was obtained and documented (after the investigator has given oral and written information about the study to the subject).~* The subject was conscious, co-operative, and agreed to return for the scheduled visits and tests and any visits required to obtain additional safety information.~* The subject's medical history, physical examination (including vital signs, pulse oximetry, PFT's, and 12-lead electrocardiogram \[ECG\]), and clinical laboratory tests (hematology, serum chemistry) obtained at the screening visit were within acceptable limits for entry into the study, as judged by the investigator.~Exclusion Criteria:~* Subject is \<40 or \>70 years old~* Subject known to be pregnant~* Subject with a baseline oxygen requirement \> 2 l/min via nasal cannula~* Any known contraindication to MRI examination~* Inability to provide informed consent~* A language, communication, cognitive or behavioral impairment that might interfere with fully informed consent~* Active drug or alcohol dependence~* Homelessness or other unstable living situation~* Active drug or alcohol dependence~* Significant co-morbidities such as heart disease, kidney disease, liver disease, hematologic or neurological disease that require continuing treatment.

- Gender: ALL
- Minimum Age: 40 Years
- Maximum Age: 70 Years
- Healthy Volunteers: t

Study Arms:
- Healthy non-smokers (Type: None): Hyperpolarized Helium-3. Amounts adjusted based on subject's total lung capacity
- Asymptomatic smokers (Type: None): Hyperpolarized Helium-3. Amounts adjusted based on subject's total lung capacity
- COPD subjects (Type: None): Hyperpolarized Helium-3. Amounts adjusted based on subject's total lung capacity

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