Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable semi upright view of the chest . Lung volumes are somewhat low though allowing for this the lungs appear clear . There is no large effusion or pneumothorax seen . The cardiomediastinal silhouette is unremarkable and unchanged . Bony structures are intact . High riding right humeral head suggests chronic rotator cuff disease .
    OUTPUT:
    
No acute intrathoracic process .