Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . There are streaky left basilar opacities , similar to prior , most likely due to scarring . There is persistent blunting of the posterior right costophrenic angle as on prior compatible with fat - containing Bochdalek hernia seen on CT scan performed the same day . The lungs are otherwise clear . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormality is identified . Old healed right rib fractures are again seen .
    OUTPUT:
    
No acute cardiopulmonary process .