Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since prior , there has been interval placement of left - sided pigtail catheter projecting over the left costophrenic angle . There is no visualized pneumothorax on the current exam noting that the chin obscures portion of the lung apices bilaterally . Left basilar opacity is at least partially due to atelectasis . Fiducial marker now projects over the left mid upper lung focal opacity as seen on prior . Known spiculated right upper lung nodule is also noted . Cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Interval placement of left - sided pigtail catheter . No visualized pneumothorax .