Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral images of the chest demonstrate slightly decreased lung volumes likely due to poor inspiration , but lungs are clear . The left hemidiaphragm is elevated slightly . Epicardial defibrillators are seen . Venous access line is again seen with the tip in the right atrium . There is no pneumothorax or pleural effusion . Cardiomediastinal silhouette is unremarkable . Visualized osseous structures are unremarkable .
    OUTPUT:
    
Unchanged chest radiograph from previous imaging with no evidence of pneumonia .