Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded and clear . Splaying of the carina , double cardiac silhouette in the left , and a transverse dimension of the right atrium of 11 .2 cm are compatible with right atrial enlargement which appears stable compared with the previous exam allowing for difference in technique . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Stable moderate cardiomegaly with primary right atrial contribution . No evidence of pneumonia .