Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No focal opacity to suggest pneumonia is seen . Right infrahilar opacities are linear and felt to represent overlapping structures . No pleural effusion , pneumothorax , or pulmonary edema is seen . The heart size is normal . There are calcifications of the aortic arch .
    OUTPUT:
    
No radiographic evidence of acute intrathoracic process .