Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates diffuse interstitial markings bilaterally in keeping with chronic interstitial lung disease . There is no pleural effusion or pneumothorax . Cardiomediastinal and hilar contours are stable in appearance . No acute osseous abnormality it detected .
    OUTPUT:
    
Chronic interstitial lung disease without definite evidence of an acute intrathoracic abnormality .