Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart appears mildly enlarged . The aorta is partly calcified and mildly unfolded . Patchy opacity projecting over the lingular area suggests minor residual scarring or atelectasis , but decreased . There are no pleural effusions or pneumothorax . Mild losses among mid and lower thoracic vertebral body heights appear unchanged . A contour abnormality of the left posterolateral fifth rib appears old and unchanged suggesting a prior fracture .
    OUTPUT:
    
No evidence of acute injury .