Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The heart size is accentuated due to the presence of low inspiratory lung volumes , appearing borderline enlarged . Mediastinal and hilar contours are normal . No pulmonary edema is demonstrated . Assessment of the lung bases is limited by low lung volumes . Patchy opacities in both lower lobes may reflect atelectasis . No right pleural effusion is demonstrated , and no large left pleural effusion is seen , though a small left pleural effusion is not completely excluded . No pneumothorax is detected .
    OUTPUT:
    
Low lung volumes limit assessment of the lung bases . Patchy opacities at the lung bases likely reflect areas of atelectasis though infection can not be excluded . There may be a trace left pleural effusion . Consider repeat PA and lateral views when the patient can take a deeper inspiration for improved assessment of the lung bases .