Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged with a left ventricular predominance , but decrease in size compared to the prior exam . The mediastinal and hilar contours are unremarkable . Streaky opacities in the lung bases may reflect areas of atelectasis . No focal consolidation , pleural effusion or pneumothorax is identified . Previous pattern of mild pulmonary vascular congestion appears slightly improved . Patient is status post right shoulder arthroplasty . No acute osseous abnormalities are detected . Remote left - sided rib fractures are re - demonstrated .
    OUTPUT:
    
Patchy opacities in lung bases , likely atelectasis but infection is not excluded . Mild pulmonary vascular congestion and cardiomegaly are improved in the interval .