Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate stable mild cardiomegaly . Mediastinal contour is unchanged and dual - chamber pacemaker , sternotomy wires and replaced valve are again noted and remain unchanged in position . There is no pulmonary edema . However , in comparison to the prior study , there is obscuration of the mid portion of the right hemidiaphragm and increased opacification at the right base . There is no pleural effusion or pneumothorax . Calcifications are seen along the aortic arch , degenerative changes in the thoracic spine and an intramedullary rod in the right humerus are also noted .
    OUTPUT:
    
Increased opacification at the right base with obscuration of the mid portion of the right hemidiaphragm may represent atelectasis or airspace consolidation and pneumonia should be considered in the appropriate clinical setting .