Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta remains markedly tortuous . Mediastinal and hilar contours are otherwise similar . Pulmonary vasculature is normal . Lungs are clear without focal consolidation . Previously noted focal opacity within the left lower lung has resolved . No pleural effusion or pneumothorax is identified . No acute osseous abnormality is visualized .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Resolution of previously noted left lower lung focal opacity which was concerning for pneumonia .