Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes without pleural effusion , focal consolidation or pneumothorax . Hilar and mediastinal silhouettes are unremarkable . Heart size is normal . Patient is status post medial sternotomy . Multiple sternotomy wires appear fractures , unchanged . There is no pulmonary edema . Patient 's known anterior mediastinal mass , is better assessed on CT chest of ___ .
    OUTPUT:
    
No evidence of acute cardiopulmonary process . Known anterior mediastinal mass is better assessed on ___ CT exam .