Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The inspiratory lung volumes are appropriate . Opacification of the left lower lobe most pronounced on the lateral view is improved from ___ . There is no pleural effusion or pneumothorax . The pulmonary vasculature is not engorged . The cardiomediastinal and hilar contours are within normal limits with mild tortuosity of the thoracic aorta and minimal calcification of the aortic knob . No acute osseous abnormality is detected . Hypertrophic changes of the spine are noted .
    OUTPUT:
    
Improved but persistent opacification of the left lower lobe . Recommend follow - up to resolution .