Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright chest radiograph was obtained . The lungs appear clear bilaterally without signs of pneumonia or CHF . A dense nodule in the left mid lung is most compatible with a calcified granuloma . No large effusion or pneumothorax is seen . Heart size is normal . Mediastinal contour is unremarkable . No definite bony abnormality is seen .
    OUTPUT:
    
No acute findings in the chest .