Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right - sided chest tube terminates in the right lung apex . There is no visible pneumothorax . There may be a small right pleural effusion . Overall , right mid and lower lung atelectasis as well as linear atelectasis in the left lower lobe is unchanged . There is mild tortuosity of the aorta ; otherwise , the hilar and mediastinal contours are unremarkable . Mild cardiomegaly has been stable compared to exams dated back to ___ .
    OUTPUT:
    
No evidence of a pneumothorax . There may be a residual small right pleural effusion , however true PA and lateral radiographs are recommended for further evaluation .