Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are appreciably lower than in ___ when large air - filled stomach traversed the midline hiatus hernia . Today opacification in the right lower hemithorax is best explained by right lower lobe collapse . The new fluid collection in the hernia looks like a segment of colon . Left lung and right upper lobes are clear . Heart size top - normal .
    OUTPUT:
    
Acute right lower lobe collapse . New loop of fluid - filled bowel traverses hiatus hernia .