Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously visualized right subclavian PICC is visualized with the catheter tip at the upper SVC . Post - surgical changes are visualized with clamshell mid sternal wires , mediastinal clips , and replace the aortic valve . Otherwise , the lungs are clear with no evidence of consolidation , effusion , or pneumothorax . The cardiomediastinal silhouette remains stable . Osseous structures are stable .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .