Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are markedly low lung volumes bilaterally , but are otherwise clear with no areas of focal consolidation , pleural effusion or pneumothorax . Previously seen cluster of opacities in the left lower lobe is not appreciated on current study . The heart is top normal in size and the aorta is tortuous and moderately calcified . Pleural surfaces are unremarkable . There are stable mild degenerative changes seen along the thoracic spine . Patient is status post cholecystectomy with distal clips in the right upper quadrant .
    OUTPUT:
    
No evidence of infection or malignancy .