Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Endotracheal tube tip terminates approximately 5 cm from the carina and the orogastric tube tip is within the stomach . The heart size is normal . The aorta is slightly unfolded . There is crowding of the bronchovascular structures due to low lung volumes . Streaky opacities within the lung bases likely reflect atelectasis . No large pneumothorax is identified on this supine study . A possible trace right pleural effusion may be present as the right costophrenic angle is slightly indistinct . No acute osseous abnormalities seen .
    OUTPUT:
    
Endotracheal and orogastric tube tips are in standard positions . Low lung volumes with streaky opacities in the lung bases , likely atelectasis . Possible trace right pleural effusion .