Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . The lungs are clear . Cardiomediastinal silhouette is within normal limits . Increased density projecting over the right side of the cardiac silhouette is again noted , potentially left atrium . The azygoesophageal recess is not displaced . No acute osseous abnormality detected .
    OUTPUT:
    
No acute cardiopulmonary process . Double density projecting over the region of the right atrium , potentially due to configuration of the left atrium . If desired , further characterization could be performed by CT .