Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are compared to previous portable chest x-ray from ___ . There is a moderate to large left and small right pleural effusion , decreased in size on the right compared to prior . More dense left basilar opacity suggestive of underlying atelectasis , with consolidation also possible . Superiorly , the lungs are clear . Cardiomediastinal silhouette is unchanged as are the osseous and soft tissue structures . Surgical clips in the upper abdomen again noted .
    OUTPUT:
    
Moderate to large left effusion and smaller right pleural effusion compared to prior . Likley underlying atelectasis with possible airspace disease at the left lung base .