Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are within normal limits . Three catheters , likely drains for recent right latissimus flap surgery , are seen projecting over the chest , two of which whose tips project over the medial aspect of the left hemithorax , and one of which projects over the base of the right hemithorax . The lungs are clear . No pleural effusions , pneumothorax , or pulmonary edema is seen . No acute osseous abnormality is present .
    OUTPUT:
    
No acute cardiopulmonary process .