Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild cardiomegaly is similar to prior . Pleural effusions have nearly completely resolved since the prior exam . No focal consolidation or pneumothorax . Left lung base linear opacities are compatible with scarring or atelectasis . A mitral valve prosthesis is noted . Sternotomy wires are intact . Osseous structures are unremarkable .
    OUTPUT:
    
Left lung base atelectasis or scarring . Near - complete interval resolution of bilateral pleural effusions .