Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is at the upper limits of normal or slightly enlarged . Mediastinal and hilar silhouettes are otherwise within normal limits . No CHF , focal infiltrate , effusion , or pneumothorax is detected . No free air seen beneath the diaphragms . No displaced rib fractures detected on these lung technique films . Assessment of bony detail in the thoracic spine is quite limited due to lung technique and overlying soft tissues .
    OUTPUT:
    
1 . Heart size at the upper limits of normal or slightly enlarged . No acute pulmonary process detected . 2 . Please note that assessment of the thoracic spine is relatively limited on these views .