Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . There is interval mild improvement in bilateral diffuse interstitial opacities . Dense left retrocardiac opacity persists . Small left pleural effusion . There has been interval removal of right - sided PICC with placement of a right jugular venous catheter terminating in the proximal SVC . Unchanged position of left pacer maker with intact pacer wires . Hepatic flexure of the colon is located beneath the right hemidiaphragm compatible with Chilaiditis .
    OUTPUT:
    
Low lung volumes with mild interval improvement in interstitial edema , persistent small left pleural effusion and left basilar atelectasis . Interval removal of right PICC with placement of a right IJ catheter terminating in the proximal SVC .