Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is at the upper limits of normal , similar to ___ . No CHF , focal infiltrate , effusion or pneumothorax detected . No rib fracture identified on these lung technique films . No free air seen beneath the diaphragm . Mild right convex curvature of the thoracic spine is suggested , similar to the ___ radiograph .
    OUTPUT:
    
No acute pulmonary process identified . No pleural effusion or pneumothorax detected .