Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP portable chest radiograph demonstrates diffuse bilateral interstitial markings consistent with known interstitial lung disease . No acute focal opacity concerning for pneumonia is seen . There is no pleural effusion or pneumothorax . A left chest pacer defibrillator is identified , its leads in unchanged position when compared to prior radiograph dated ___ . Density inferior to the right chest leads is likely reflective of calcified pleural plaques . Patient is status post median sternotomy . Cardiomediastinal and hilar contours are stable . No acute osseous abnormality is detected .
    OUTPUT:
    
No acute abnormality detected .