Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The heart size is borderline enlarged . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Minimal patchy left basilar opacity likely reflects atelectasis . No pleural effusion or pneumothorax is seen . There are mild degenerative changes noted in the imaged thoracolumbar spine .
    OUTPUT:
    
Left basilar patchy opacity likely reflects atelectasis in the setting of low lung volumes . Infection is not completely excluded , and if there is continued clinical concern , consider repeat PA and lateral views with improved inspiratory effort .