Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is minimal left basilar atelectasis . The lungs are otherwise clear without evidence of a pneumonia or pulmonary edema . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal , and unchanged from the prior CT . There is equivocal intraperitoneal air layering below the left hemidiaphragm , though this may be gastric gas . The bowel gas pattern is nonspecific .
    OUTPUT:
    
1 . Equivocal pneumoperitoneum below the left hemidiaphragm . Consider further evaluation with a CT scan . 2 . No acute cardiopulmonary process .