Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is present . Aortic knob is calcified . Linear opacities in both lung bases likely reflect subsegmental atelectasis . There is mild pulmonary vascular congestion . No overt pulmonary edema is seen . There is no pleural effusion or pneumothorax . No acute osseous abnormalities identified .
    OUTPUT:
    
Mild pulmonary vascular congestion and bibasilar atelectasis .