Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . Streaky opacity projecting over the retrocardiac region on the frontal view not seen on the lateral view is unchanged and unlikely to represent an acute process . The lungs are otherwise unremarkable . There is no effusion or pulmonary vascular congestion . The cardiomediastinal silhouette is normal . Osseous structures are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .