Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Low lung volumes and elevation of the left hemidiaphragm are similar to prior . Pulmonary vascular markings are indistinct , compatible with mild pulmonary edema . Left base atelectasis is present . No substantial pleural effusion or pneumothorax . Cardiomediastinal contours are stable .
    OUTPUT:
    
Mild pulmonary edema with low lung volumes .