Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are somewhat low . There is no pleural effusion , pneumothorax , vascular engorgement or pulmonary edema . Tiny pleural effusion on the left , if any . Mediastinal and hilar contours are stable . Heart is normal .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Equivocal left pleural effusion .