Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal shadow is normal . Prominent hila . No airspace consolidation . Mild elevation of the left hemidiaphragm . Opacification in the left lung base most likely represents atelectasis and a small pleural effusion . No pneumothorax . Spondylotic changes of the thoracic spine .
    OUTPUT:
    
No pneumonia . Minimal atelectasis with a small effusion seen in the left lung base . Prominent hila suggest pulmonary arterial enlargement and pulmonary arterial hypertension should be excluded .