Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are provided . Dialysis catheter again seen with right IJ access with tip in the region of the right atrium . There is no focal consolidation , effusion or pneumothorax . The heart size appears normal . Mediastinal contour is unremarkable . Bony structures are intact . No free air is seen below the right hemidiaphragm . There is a linear density in the region of the right middle lobe which could represent some atelectasis or scarring . Clips noted in the right upper quadrant .
    OUTPUT:
    
Linear density in the right middle lobe region likely represents atelectasis or scarring . No definite signs of pneumonia .