Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are compared to previous exam from ___ . A subtle increased opacity projecting over the heart on the lateral view which is not corroborated on the frontal and may be due to atelectasis . Elsewhere , lungs are clear . Cardiomediastinal silhouette is normal . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
No definite acute cardiopulmonary process . Probable atelectasis , seen only on the lateral view .