Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate enlargement of the cardiac silhouette is again noted with a left ventricular predominance . The aorta remains tortuous . The mediastinal and hilar contours are otherwise grossly unchanged . The pulmonary vasculature is not engorged . Patchy atelectasis is noted in the lung bases . No focal consolidation , pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities demonstrated .
    OUTPUT:
    
Patchy opacities in the lung bases , likely atelectasis .