Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Right PICC is seen with tip best delineated on the lateral view within the lower SVC . Retrocardiac opacity persists but is improved since exam ___ days prior . Superiorly , the lungs are clear . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormality is identified . Surgical clips project over the left upper quadrant . Cervical fixation hardware is identified .
    OUTPUT:
    
Resolving left lower lobe opacity compared to exam from four days prior . Right PICC tip in the distal SVC .