Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates low lung volumes with resulting bronchovascular crowding . There is mild cardiomegaly , which is unchanged . Again seen is a chronic left - sided pleural effusion versus pleural thickening with some adjacent atelectasis , overall not significantly changed from the prior study . A left - sided peripheral line ends in the axilla . The patient is status post CABG with median sternotomy wires in place .
    OUTPUT:
    
Chronic left pleural effusion versus pleural thickening adjacent atelectasis , overall not significantly changed from the prior study .