Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax . The lungs are well expanded . A double contour of the breast tissue bilaterally is consistent with bilateral breast implants . Hazy opacification of the lower lungs may be accounted for by breast implants . However , the suggestion of air bronchograms in the left retrocardiac space with slightly increased density in this area may be indicative of an acute process . Pulmonary vasculature is within normal limits .
    OUTPUT:
    
Possible left retrocardiac opacity , which may be accounted for by breast implant . Lateral radiograph is recommended for further evaluation .