Please assess the completion status of the following clinical trial:

Trial Title: Prone Patient Positioning in Reducing Tumor Motion and Improving Breathing Reproduction in Patients With Lung Cancer Undergoing Radiation Therapy

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:~* Measurable disease on the planning computed tomography (CT) scan~* Patients with lung cancer visible on fluoroscopic imaging or planning CT who are scheduled to receive external beam radiation treatment will be eligible for this study~Exclusion Criteria:~* Patients requiring continuous supplemental oxygen due to the requirement of spirometry during all imaging studies~* Pregnant females

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Diagnostic (CT and 4D CT in supine and prone positioning) (Type: None): Patients undergo conventional CT scan and 4D CT scan in both supine and prone positioning before undergoing radiation therapy.

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