Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were obtained . Lung volumes are low , although the lungs appear essentially clear bilaterally . No definite signs of pneumonia or CHF . Cardiomediastinal silhouette appears grossly unremarkable . Bony structures appear grossly stable . Resorptive changes at the right distal clavicle are partially imaged .
    OUTPUT:
    
No signs of pneumonia .