Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The study is limited due to patient rotation . The aorta remains diffusely calcified and markedly tortuous , relatively unchanged compared to the prior exam . The heart size is at least mildly enlarged . Calcified right superior mediastinal nodule , likely thyroid in origin , is again seen . No pulmonary vascular engorgement is identified . The left lung is grossly clear . Hazy opacity within the right lung base could reflect a combination of atelectasis and small pleural effusion though infection can not be excluded . No pneumothorax is identified . Diffuse demineralization of the osseous structures is present .
    OUTPUT:
    
Limited study due to patient rotation . Hazy opacity in the right lung base could reflect a combination of small right pleural effusion and atelectasis though infection can not be excluded . Extensively tortuous thoracic aorta .