Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left PICC is seen with tip at the upper SVC . On the lateral view , there is increased opacity projecting over the lower spine obscuring likely the right posterior costophrenic angle . Superiorly and on the frontal view , the lungs are clear . The cardiac silhouette is enlarged but unchanged . Tortuosity of descending thoracic aorta is noted . No acute osseous abnormalities .
    OUTPUT:
    
Increased opacity projecting over the posterior costophrenic angle likely localizing to the right which could represent atelectasis or infection .