Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged allowing for differences in technique aside from decreased heart size . Mitral annular calcifications are prominent . The main pulmonary artery contour is again mildly prominent . The aortic arch is calcified . There is no pleural effusion or pneumothorax . Streaky opacities in the left mid lung probably in the lingula and medial right lower lung , probably in the right lower lobe are suggestive of minor atelectasis , although particularly with regard to the latter , an early developing pneumonia is difficult to exclude .
    OUTPUT:
    
Patchy basilar opacities , probably compatible with atelectasis , although developing pneumonia not excluded in the right lower lung .