Please assess the completion status of the following clinical trial:

Trial Title: Real-time Tumor Localization and Guidance for Radiotherapy Using Ultrasound (US) and Magnetic Resonance (MR)

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

Eligibility Criteria:
Inclusion Criteria (Healthy Volunteers):~* Must be eighteen (18) years of age or older.~* Must be able to provide informed consent.~Inclusion Criteria (Patients):~* Patients diagnosed with malignancies of the liver.~Exclusion Criteria (All):~* Under the age of eighteen (18) years.~* BMI exceeds the size of the bore of the MRI scanner.~* Unable or unwilling to provide informed consent.~* Contraindications, as described in the volunteer consent form, to MR or US scanning such as but not limited to accidental or implanted ferrous metal and/or implanted devices whose function can be disturbed by the main magnetic field, gradient magnetic fields, or radiofrequency energy.~* Women who are pregnant, suspect they might be pregnant or breastfeeding.

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

Study Arms:
- Control Group (Type: None): Healthy volunteers will be asked to complete a single imaging session that will include acquiring simultaneous 4D ultrasound and 4D MRI scan.~A substudy including patients undergoing radiotherapy for malignancies of the abdomen and pelvis. They will also be asked to complete a single imaging session that will include acquiring simultaneous 4D ultrasound and 4D MRI scan.
- Patient Group (Type: None): Patients receiving radiotherapy for malignancies of the abdomen and pelvis will be asked to complete two research visits lasting approximately one hour. Each visit will include a 30 minute combined 4D ultrasound and 4D MRI scan.

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