Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low with fibrotic changes present at the lung bases . In addition there is increased airspace opacities , most pronounced on the right . There is no pleural effusion or pneumothorax . Cardiomediastinal silhouette is unchanged . There is no acute osseous abnormality . Calcifications project in the right upper quadrant
    OUTPUT:
    
Diffuse increased airspace opacities in the background of fibrotic lung disease , findings could be secondary to vascular congestion , atypical infection , or acute exacerbation of interstitial lung disease .