Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiograph demonstrates unremarkable cardiomediastinal and hilar contours . Interstitial markings are more prominent , likely related to low lung volumes . No focal opacification identified . No pleural effusion or pneumothorax is present . No osseous abnormality identified .
    OUTPUT:
    
No acute intrathoracic process .