Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The mediastinal and hilar contours are unremarkable . Pulmonary vasculature is not engorged . Focal opacity within the left lower lobe is concerning for pneumonia combined with partial collapse . Minimal patchy opacity in the right lower lobe may also reflect an additional site of infection . There is no pleural effusion or pneumothorax . No acute osseous abnormalities seen . Clips in the right upper quadrant abdomen indicate prior cholecystectomy .
    OUTPUT:
    
Left lower lobe focal opacity concerning for pneumonia and partial collapse . Patchy right basilar opacity may reflect an additional site of infection . Followup radiographs after treatment are recommended to ensure resolution of this finding .