Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest somewhat lower lung volumes compared to the prior study with possibly some mild atelectasis of the left lung base . There is no evidence of pleural effusion or focal opacity . No pneumothorax is identified . The cardiomediastinal silhouette is unremarkable . There is no evidence of pulmonary edema .
    OUTPUT:
    
No acute cardiopulmonary process .