Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal lateral views of the chest were performed . The lung volumes are low . There is opacification of the left lung base which may represent atelectasis or crowding of the vessels . There is no pleural effusion or pneumothorax . The right lung is clear . There are no osseous abnormalities . The imaged upper abdomen is unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .