Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal lateral views of the chest . There is persistent elevation of the left hemidiaphragm . Blunting of the posterior left costophrenic angle suggestive of small effusion versus atelectasis , unchanged from remote prior . The lungs are otherwise clear without consolidation or pulmonary vascular congestion . The trachea is deviated to the right at the thoracic inlet suggestive of underlying asymmetric thyroid enlargement , unchanged . Cardiomediastinal silhouette is stable . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .