Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is moderate to severely enlarged , slightly increased compared to the previous exam . The aorta is diffusely calcified and markedly tortuous . The pulmonary vasculature is normal . Apart from minimal atelectasis in the right lung base , the lungs are clear . No pleural effusion or pneumothorax is demonstrated . No acute osseous abnormalities detected .
    OUTPUT:
    
Moderate to severe cardiomegaly , slightly increased compared to the previous exam . Mild right basilar atelectasis .