Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Slightly low lung volumes result in bronchovascular crowding . There is no focal consolidation , pleural effusion or pneumothorax . Heart size is normal . Mediastinal contour is unchanged since ___ with a right - sided aortic arch , confirmed on MRI ___ .
    OUTPUT:
    
No pneumonia , edema , or effusion .