Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aortic knob is calcified . Mediastinal contours are unremarkable . There is no pulmonary edema . Ill - defined opacities within both lung bases are concerning for pneumonia or aspiration . No pleural effusion or pneumothorax is clearly identified . There are multilevel degenerative changes in the thoracic spine . Degenerative changes are also noted within the right shoulder with narrowing of the acromiohumeral interval suggestive of rotator cuff disease .
    OUTPUT:
    
Bibasilar pneumonia or aspiration .