Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear left basilar opacity is most likely atelectasis . Lungs are otherwise clear without consolidation or large effusion . Posterior costophrenic ankle on the right is excluded from the field of view . Aortic core valve device is again seen . Mild cardiomegaly and tortuosity of the descending thoracic aorta is unchanged . Median sternotomy wires and mediastinal clips again noted .
    OUTPUT:
    
No acute cardiopulmonary process .