Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no focal consolidation , pleural effusion or pneumothorax . Lung volumes are low . Linear opacities at the left base are likely atelectasis . Cardiomediastinal sillhouette is unremarkable . There are degenerative changes at the shoulder joints bilaterally , right greater than left . There is cervical fusion hardware in place .
    OUTPUT:
    
No acute cardiopulmonary process . Atelectasis at the left base .