Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP semi-upright portable chest x-ray was provided . Similar to the prior exam , there is a moderate - to - large right - sided pleural effusion with overlying atelectasis . Underlying consolidation can not be excluded . There has been interval improvement in the left pulmonary opacities . Cardiomediastinal silhouette appears grossly stable from the prior study . There is no pneumothorax .
    OUTPUT:
    
Stable moderate - to - large right - sided pleural effusion . Underlying consolidation can not be excluded . Improvement in the left pulmonary edema .