Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The lungs are clear without focal consolidation , pleural effusion or pneumothorax . Mild cardiomegaly and aortic tortuosity are unchanged from three days prior . Hilar contours are normal . No displaced rib fracture is identified . Mild loss of height in the lower thoracic vertebral body is unchanged from ___ and of unknown chronicity .
    OUTPUT:
    
Mild cardiomegaly , unchanged . No acute intrathoracic process .