Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is no new focal opacity . Again seen are left hemidiaphragm elevation and atelectasis / scarring , unchanged since prior study from ___ . There is a small left pleural effusion . Pulmonary vasculature is normal .
    OUTPUT:
    
No acute intrathoracic process .