Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable supine chest radiograph was provided . Lung volumes are low . There is continued elevation of the right hemidiaphragm . Previously seen opacities in the right and left upper lung fields are no longer visualized . There is no definite evidence of focal consolidation or pneumothorax . There may be small bilateral pleural effusions . Cardiomediastinal silhouette is unchanged . A right humeral prosthesis is noted .
    OUTPUT:
    
No evidence of pneumonia or CHF .