Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is unchanged . Median sternotomy wires are intact and in normal alignment . The patient is status post mitral valve repair . A left pacer is re-demonstrated . There is no pneumothorax or pleural effusion . Right juxta hilar triangular opacity corresponds to collapsed right upper lobe as seen on prior . Blunting of the right costophrenic angle and irregularity along the right hemidiaphragm and right heart border are sequelae of radiation fibrosis / atelectasis .
    OUTPUT:
    
No acute cardiopulmonary process .