Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are well expanded and clear . There is no pneumothorax or pleural effusion . Cardiomediastinal silhouette is unremarkable . Visualized osseous structures are unremarkable . Radiopaque surgical material is noted in the right upper quadrant .
    OUTPUT:
    
Unremarkable chest radiograph with no evidence of acute pulmonary or cardiac process .