Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires again noted . Previously noted right IJ central venous catheter is been removed . Elevation of the left hemidiaphragm is unchanged with mild left basal atelectasis . A tiny nodular opacity at the right lung base could represent a small calcified granuloma . No convincing evidence for pneumonia or edema . There is mild central congestion . No large effusion or pneumothorax is seen .
    OUTPUT:
    
Central congestion , left basal opacity likely scarring atelectasis .