Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low . Mild to moderate enlargement of the cardiac silhouette is unchanged . The aortic knob is calcified . Mediastinal and hilar contours are similar with enlargement of the right hilum appearing unchanged . Pulmonary vasculature is not engorged . Patchy opacity is seen in the left lower lobe , as noted on the prior examinations , and likely reflective of chronic bronchiectasis with bronchial wall thickening , atelectasis and chronic aspiration . No new focal consolidation is present . No large pleural effusion is present with chronic blunting of the right costophrenic sulcus likely due to chronic pleural thickening . No pneumothorax is seen . Patient is status post bilateral shoulder arthroplasties , incompletely imaged .
    OUTPUT:
    
Patchy left lower lobe opacity , as seen on the previous exams , and likely reflective of chronic bronchiectasis with atelectasis and chronic aspiration , better detailed on the previous CT . No new focal consolidation .