Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Status post prior median sternotomy . The left hemodialysis catheter is unchanged , projecting over the right atrium . No focal consolidation , pleural effusion or pneumothorax identified . Unchanged linear atelectasis / scarring in the left lower lung zone . The size of the cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
No significant interval change since the prior exam . Unchanged position of the hemodialysis catheter .