Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a hazy right midlung opacity which is seen on prior exam dating back to ___ but not definitively seen in ___ . Streaky left basilar opacity is also noted , unchanged from most recent exam although potentially due to atelectasis given low lung volumes . Cardiomediastinal silhouette is within normal limits on this single portable film . No acute osseous abnormalities visualized .
    OUTPUT:
    
Hazy right mid lung opacity which has persisted since ___ . No definite acute cardiopulmonary process .