Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable frontal semi-erect chest radiograph demonstrates well - defined opacity overlying the right lower lobe is compatible with a Bochdalek hernia is seen on CT from earlier the same day . Opacities in the left mid lung and left base likely represent left lower lobe masses seen on the same CT . There is no appreciable pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal . No displaced rib fracture is identified .
    OUTPUT:
    
No acute cardiopulmonary process . Opacity at the left mid lung and left lung base likely represent left lower lobe masses seen on CT from earlier the same day .