Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were obtained . Apparent bibasilar interstitial opacities , new since ___ , may be due to low lung volumes , and summation of soft - tissue shadows . No effusion or pneumothorax is present . The heart size is normal .
    OUTPUT:
    
No acute cardio - pulmonary process .