Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are moderately well expanded with mild vascular congestion . Right lung is clear . Left lower lobe heterogeneous opacity is most consistent with atelectasis given elevation of left hemidiaphragm . No additional focal opacity . Heart size , mediastinal contour , and hila are unremarkable . No pleural effusion or pneumothorax .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Left lower lobe atelectasis . 3 . Mild vascular congestion .