Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP portable view of the chest is obtained . No focal consolidation , pleural effusion , or evidence of pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable . The cardiac silhouette is not frankly enlarged . Mild degenerative changes of the right acromioclavicular joint are seen .
    OUTPUT:
    
No acute intrathoracic process .