Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An ICD is in place . 1 lead overlies right atrium AND AN other overlies the right ventricle . The third lead courses posteriorly and lies in the expected location of the coronary sinus . There is a small effusion at the right costophrenic angle . There is probable atelectasis with a small curvilinear sliver of air in between . This is less likely to represent a RIGHT LUNG BASE pneumothorax , as there is no corresponding abnormality on the lateral view . Left costophrenic sulcus is clear . No overt CHF or focal infiltrate identified . No apical pneumothorax detected . Background hyperinflation likely present , similar to prior
    OUTPUT:
    
ICD leads over right atrium , right ventricle , and in region of coronary sinus . Probable atelectasis and small right pleural effusion new or more pronounced than on ___ . Right lung base pneumothorax is considered much less likely . Attention to this area on followup films is requested .