Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP view of the chest demonstrates relatively low lung volumes . The cardiac silhouette is slightly prominent , but this is likely due to AP portable technique . No focal opacity is identified within the lungs and there is no evidence of pneumothorax , pleural effusion or pulmonary edema .
    OUTPUT:
    
No acute cardiopulmonary process .