Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . Mediastinal and hilar contours are within normal limits . Pulmonary vasculature is not engorged . Lungs are hyperinflated . 8 mm nodular opacity is seen within the left upper lung field . Remainder lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . Moderate multilevel degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
1 . 8 mm left upper lung field nodular opacity . Comparison with previous imaging is recommended , and if none are available , nonemergent chest CT is recommended for further assessment . 2 . No acute cardiopulmonary process .