Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to the previous radiograph , there is no relevant change . Normal lung volumes . Normal structure and transplanted lung parenchyma . No evidence of acute or chronic lung disease . In particular , there is no evidence of tuberculosis changes . Normal size of the cardiac silhouette appears normal . Hilar and mediastinal structures . No pleural effusions .
    OUTPUT:
    
No lung parenchymal or cardiac abnormalities .