Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable chest x-ray . The lungs are grossly clear given limitation of portable technique positioning and overlying soft tissues . The cardiac silhouette appears enlarged , but likely in part contributed to technique and positioning . Left chest wall dual - lead pacing device is identified .
    OUTPUT:
    
Possible mild cardiomegaly without acute cardiopulmonary process .