Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are mildly hypoinflated with focal linear left lower lobe opacity . Mild vascular congestion is present . No focal opacity . No pleural effusion or pneumothorax . Mild cardiomegaly with coronary stents is stable . A tortuous aorta is present . Mediastinal contour and hila are unremarkable . Visualized osseous structures are notable for multilevel degenerative changes of the thoracic spine with endplate sclerosis and disc space loss .
    OUTPUT:
    
1 . Mild vascular congestion . 2 . Left basilar opacity is most consistent with atelectasis . If there is strong clinical suspicion for pneumonia , short - term followup radiographs may be considered .