Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Stable mild cardiomegaly . Lung volumes are slightly lower on this exam compared to the prior . A moderate left , loculated , pleural effusion may be slightly smaller . There is no evidence of pneumothorax . There is no evidence of focal consolidation in either lung . There are multiple loose bodies seen adjacent to the left glenohumeral joint .
    OUTPUT:
    
Moderate , loculated left pleural effusion slightly decreased from the prior study .