Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Minimal bibasilar subsegmental atelectasis is unchanged . There is no new consolidation . A minimal trace left pleural effusion is present . The heart and mediastinum are within normal limits . Mild kyphosis is unchanged . A new percutaneous cholecystostomy tube projects over the right upper quadrant .
    OUTPUT:
    
Unchanged bibasilar subsegmental atelectasis and trace left pleural effusion . Infection at the left base can not be excluded in the appropriate clinical context .