Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No strong evidence of pneumonia is identified , though low lung volumes limit evaluation of the bases , particularly on the left . No pleural effusion , pulmonary edema , or pneumothorax is present . The cardiomediastinal silhouette is unchanged with tortuosity of the aorta and top normal heart size . A previously seen right - sided PICC has been removed . A left humeral prosthesis is partially imaged .
    OUTPUT:
    
No strong evidence of pneumonia , though evaluation at the bases , particularly on the left is limited due to low lung volumes . PA and lateral radiographs are recommended .