Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no focal consolidation , pleural effusion , pneumothorax , or pulmonary edema . No triangular opacity to suggest pulmonary infarct . The cardiomediastinal silhouette is within normal limits . Background hyperinflation is noted .
    OUTPUT:
    
No acute pulmonary process identified . Please note that presence or absence of venous thrombosis can not be assessed based on radiographs .