Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left hemodialysis catheter ends in the right atrium . Mediastinal clips and sternotomy wires are in appropriate position . Mild - to - moderate cardiomegaly is unchanged . Mild pulmonary vascular congestion is unchanged . Mild left basilar atelectasis with likely tiny left pleural effusion . Right lung is clear . No evidence of pneumonia .
    OUTPUT:
    
No evidence of pneumonia .