Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increased retrocardiac density that is similar to most recent prior examination from ___ but increased from ___ . Though this could reflect vascular crowding , aspiration or pneumonia are within the differential . No other confluent consolidation is identified . There is no pneumothorax . Cardiomediastinal and hilar contours are within normal limits . There is no interstitial edema or large pleural effusion .
    OUTPUT:
    
Retrocardiac opacification may reflect bronchovascular crowding though aspiration or pneumonia are possible . Recommend dedicated PA and lateral chest radiographs when patient is able for further evaluation .