Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . There is a dual lead pacemaker / ICD device that appears unchanged . The mediastinal and hilar contours appear similar . The aortic arch is again calcified . There is mild relative elevation of the anterior right hemidiaphragm , as seen previously and suggesting a small eventration . Patchy basilar opacities suggest minor atelectasis or scarring and appear unchanged . In addition , there is a vague retrocardiac opacity with increased density which potentially indicates early infection . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Vague new retrocardiac opacity , potentially due to pneumonia ; lower airway inflammation or infection could also be considered in addition to bronchopneumonia . Short - term followup radiographs may be helpful to evaluate further if clinically indicated .