Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal . The hilar and mediastinal contours are within normal limits . There is no pneumothorax , focal consolidation , or pleural effusion . Coarse linear bibasilar opacities compatible with atelectasis . Pulmonary vessels are prominent , however , there is no overt edema . There are old left rib fractures .
    OUTPUT:
    
No acute intrathoracic process .