Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: When compared to prior , there has been interval placement of a left base chest tube . Degree of opacification of the left hemi thorax has decreased with some aeration in the left lung although multi focal nodular densities are suspicious for underlying nodules and regions of persistent atelectasis / consolidation . Although not definitive , there is suspected left apical pneumothorax medially . Right lung pulmonary nodules as seen on previous exam .
    OUTPUT:
    
Interval placement of left - sided pigtail catheter with improved aeration in the left lung but persistent diffuse opacity . Suspected but not definitive left apical pneumothorax .