Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increased opacity at the right lung base with a configuration of the diaphragm with peak relatively lateral compatible with subpulmonic effusion . Linear right midlung opacity is similar to prior , potentially combination of fluid in the fissure and atelectasis . Left basilar atelectasis is noted . Elsewhere , the lungs are clear . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities . Surgical clips project over the left axilla .
    OUTPUT:
    
Moderate right - sided pleural effusion . Right midlung opacity as on recent prior , potentially fluid within a fissure or atelectasis .