Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is borderline in size . The aorta is mildly tortuous . There is no pneumomediastinum . There is no pleural effusion or pneumothorax . The chest is hyperinflated . A focal area of opacification is noted in the right upper lobe as well as streaky retrocardiac opacification and vague opacity effacing the right lateral costophrenic angle . Air beneath the right hemidiaphragm is consistent with intraluminal air in colon interposed immediately below the diaphragm .
    OUTPUT:
    
No evidence of pneumomediastinum . Right upper lobe opacity ; differential considerations pneumonia in the appropriate setting or perhaps a more chronic opacity . Correlation with prior radiographs is recommended in follow - up , if available , or alternatively follow - up radiographs within three months to reassess .