Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No significant interval change . Bilateral lower lung volumes are overall unchanged . No focal consolidation , pleural effusion , pulmonary edema , or pneumothorax . Linear opacities in the bilateral lung bases are unchanged and reflects scarring . The heart size is normal . The mediastinum and hila are within normal limits and unchanged from the prior exam . Numerous surgical clips projecting over the thorax , abdomen , left neck , and left axilla / lateral chest wall prior unchanged . Coronary artery stent appears patent and also unchanged .
    OUTPUT:
    
No acute intrathoracic abnormality including no focal consolidation to suggest pneumonia . The right lung base , the area of clinical concern , is clear .