Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal , pleural and pulmonary structures are unremarkable . There is no pneumothorax or pleural effusion . No focal airspace opacity is seen to suggest pneumonia . Heart size is normal . Surgical material is seen overlying the right breast consistent with prior mastectomy and flap reconstruction .
    OUTPUT:
    
No acute cardiopulmonary process .