Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior study from earlier today , there is no interval change in the position of the pacemaker leads or the pacemaker generator . There is no pleural effusion . The cardiac and mediastinal contours are unchanged and the lungs are clear .
    OUTPUT:
    
No interval change in position of pacemaker leads , since 8 : 30 this morning , and no development of pleural effusion .