Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Lung volumes are low . A patchy opacity at the right lung base is unchanged . No pleural effusion or pneumothorax . Hilar and cardiomediastinal contours are normal .
    OUTPUT:
    
Unchanged patchy opacity at the right lung base may reflect atelectasis , aspiration or pneumonia . Repeat imaging in ___ days may be performed if further evaluation is clinically indicated .