Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable frontal chest radiograph demonstrates intact sternotomy wires and mitral valve replacement . The right subclavian catheter is again seen with the tip in the right atrium , and the left jugular catheter tip is in the mid to lower SVC . The remainder of the exam is unchanged , including mild pulmonary edema , a likely small left pleural effusion , and left lower lobe atelectasis .
    OUTPUT:
    
Unchanged chest radiograph demonstrating mild pulmonary edema , a likely small left pleural effusion , and left lower lobe atelectasis .